CN104601212B - 用于多输入多输出系统中的天线选择的方法和设备 - Google Patents

用于多输入多输出系统中的天线选择的方法和设备 Download PDF

Info

Publication number
CN104601212B
CN104601212B CN201510024446.2A CN201510024446A CN104601212B CN 104601212 B CN104601212 B CN 104601212B CN 201510024446 A CN201510024446 A CN 201510024446A CN 104601212 B CN104601212 B CN 104601212B
Authority
CN
China
Prior art keywords
antenna
virtual
subcarrier
symbol
equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201510024446.2A
Other languages
English (en)
Other versions
CN104601212A (zh
Inventor
塔梅尔·卡杜斯
阿莫德·卡恩德卡尔
灰纳恩杰伊·阿肖克·戈尔
阿列克谢·戈罗霍夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of CN104601212A publication Critical patent/CN104601212A/zh
Application granted granted Critical
Publication of CN104601212B publication Critical patent/CN104601212B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • H04B7/0608—Antenna selection according to transmission parameters
    • H04B7/061—Antenna selection according to transmission parameters using feedback from receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/26035—Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transceivers (AREA)
  • Details Of Aerials (AREA)

Abstract

本发明涉及用于多输入多输出系统中的天线选择的方法和设备。本发明阐述可灵活地实现所需空间多路复用阶数、空间分集阶数及信道估计开销阶数的传输方案。对于数据传输来说，确定接收机的所指派副载波及空间多路复用阶数(M)，其中M≥1。对于每一所指派副载波来说，从用规范正交矩阵的V个列形成的V个虚拟天线中选择M个虚拟天线，其中V≥M。V可经选择以实现所需的空间分集阶数及信道估计开销阶数。通过应用所述规范正交矩阵，将输出符号映射到针对每一所指派副载波选择的M个虚拟天线。还将导频符号映射到所述V个虚拟天线。提供所述经映射符号以供从T个发射天线传输，其中T≥V。例如，基于正交频分多路复用(OFDM)或单载波频分多址(SC‑FDMA)产生所述经映射符号的传输符号。可针对所述T个发射天线应用不同的循环延迟以改良分集。

Description

用于多输入多输出系统中的天线选择的方法和设备
分案申请的相关信息
本案是分案申请。该分案的母案是申请日为2006年8月22日、申请号为200680038384.X、发明名称为“用于多输入多输出系统中的天线选择的方法和设备”的发明专利申请案。
相关申请案交叉参考
本申请案主张优先于2005年8月22日申请的标题为“用于用户多输入多输出通信系统中的天线分集的方法及设备(Method and Apparatus for Antenna Diversity inMulti-input Multi-Output Communication Systems)”的美国临时专利申请案第60/710,408号及2005年8月24日申请的标题为“用于用户多输入多输出通信系统中的天线分集的方法及设备(Method and Apparatus for Antenna Diversity in Multi-input Multi-Output Communication Systems)”的美国临时专利申请案第60/711,144号，所述两个专利均受让给本发明的受让人且以引用方式并入本文中。本申请案进一步涉及与本文同日申请的标题为“蜂窝式系统中的自适应扇区化(Adaptive Sectorization in CellularSystems)”序号待定的共同受让美国专利申请案，且其以引用方式并入本文中。
技术领域
本揭示内容一般来说涉及通信，且更具体来说涉及无线通信的传输方案。
背景技术
在无线通信系统中，发射机(例如基站或终端)可利用多个(T个)发射天线进行对装备有一个或多个(R个)接收天线的接收机的数据传输。所述多个发射天线可用于通过从所述天线发射不同数据来增加系统通过量及/或通过重复地发射数据来改良可靠性。举例来说，发射机可从所有T个发射天线发射既定符号，且接收机可经由R个接收天线接收这一符号的多个版本。一般来说，所发射符号的所述多个版本会改良接收机还原所述符号的能力。
可通过开发借助所述多个发射天线及(如果存在)所述多个接收天线所获得的空间维度来改良传输性能。每一对发射与接收天线之间均存在传播路径。T个发射天线与R个接收天线之间形成T-R个不同的传播路径。所述传播路径可经历不同的信道条件(例如不同的衰落、多路径及干扰影响)并可实现不同的信号对噪声及干扰比(SNR)。所述T-R个传播路径的信道响应可在路径之间发生变化，且可进一步对于分散性无线信道在频率上发生变化及/或对于时变无线信道随时间发生变化。
使用多个发射天线进行数据传输的主要缺点是：通常需要估计每一对发射及接收天线之间(或每一传播路径)的信道响应，以正确地接收数据传输。出于若干原因，估计所有T-R个发射及接收天线对的全部信道响应可能是不合需要的。首先，为了传输用于信道估计的导频，可能消耗大量链路资源，这又会减少可用于传输数据的链路资源。其次，对所有T-R个发射及接收天线对的信道估计会增加接收机处的处理开销。
因此，在此项技术中需要可改善估计所有发射及接收天线对的全部信道响应的需要的传输方案。
发明内容
本文阐述可灵活地实现所需空间多路复用阶数、空间分集阶数及信道估计开销阶数的传输方案。空间多路复用阶数确定在一个符号周期内将在一个副载波上同时发送的符号数量，空间分集阶数确定由所发射符号遵守的空间分集量，且信道估计开销阶数确定导频开销量。
在一个实施例中，为进行从发射机到接收机的数据传输，确定指派给所述接收机的副载波及用于所述接收机的空间多路复用阶数(M)，其中M≥1。对于每一所指派的副载波来说，从以规范正交矩阵的V个列形成的V个虚拟天线中选择M个虚拟天线，其中V≥M。V可经选择以实现所需的空间分集阶数及信道估计开销阶数。如下文所述，可采用各种方法选择每一所指派副载波的M个虚拟天线。通过应用所述规范正交矩阵将接收机的输出符号映射到为每一所指派副载波所选择的M个虚拟天线。同样将导频符号映射到所述V个虚拟天线。提供所述经映射输出符号及导频符号(或发射符号)以从T个物理发射天线进行传输，其中T＞V。针对每一发射天线基于所述发射天线的发射符号产生传输符号(例如，OFDM符号或SC-FDMA符号)。可对所述T个发射天线的传输符号应用不同的循环延迟。
本发明的各种方面及实施例将在下文中得到进一步详细阐述。
附图说明
根据下文所述的详细阐述并结合所述图示，将更易明了本发明的特征及性质，其中所有图示中相同的参考符号相应地进行识别。
图1显示无线通信系统。
图2A及2B分别显示MISO及MIMO信道。
图3显示具有虚拟天线的传输方案。
图4显示具有虚拟天线及循环延迟分集的传输方案。
图5显示通过循环经过各虚拟天线的MIMO传输。
图6A、6B及6C显示三个实例性副载波结构。
图7显示实例性频率跳跃方案。
图8显示用于符号率跳跃的实例性导频方案。
图9A到9D显示四个用于区块跳跃的实例性导频方案。
图10显示用于将数据及导频传输到一个或多个接收机的过程。
图11显示用于将数据及导频传输到一个或多个接收机的设备。
图12显示一个基站及两个终端的方块图。
具体实施方式
在本文中，“实例性”一词用于意谓“用作实例、例子或例证”。本文中阐述为“实例性”的任一实施例或设计均未必应解释为较其它实施例或设计为优选或有利。
图1显示具有多个基站110及多个终端120的无线通信系统100。基站是与终端进行通信的站。基站可可被称作接入点、节点B及/或某一其它网络实体且可含有接入点、节点B及/或某一其它网络实体的一些或全部功能。每一基站110均为特定地理区域102提供通信覆盖。依据使用所述术语的上下文，术语“小区”可以是指基站及/或其覆盖区域。为改良系统容量，可将基站覆盖区域分割成多个更小的区域，例如三个更小的区域104a、104b及104c。每一更小的区域均由各自的基地收发机子系统(BTS)服务。依据使用所述术语的上下文，术语“扇区”可以是指BTS及/或其覆盖区域。对于经扇区化小区来说，所述小区中的所有扇区的BTS通常共同定位于所述小区的基站内。本文所述传输技术可用于具有若干经扇区化小区的系统及具有若干未经扇区化小区的系统。举例来说，所述技术可用于前述美国专利申请案序号[代理档案号码05091]中所阐述的系统。为简洁起见，在下文阐述中，术语“基站”通用于服务扇区的BTS及服务小区的基站。
终端120通常分散于整个系统中，且每一终端均可以是固定或可移动。终端也可称作移动台、用户设备及/或某些其它装置且可含有移动台、用户设备及/或某些其它装置的一些或全部功能。终端可以是无线装置、蜂窝式电话、个人数字助理(PDA)、无线调制解调器卡等等。每一终端可在任一既定时刻与下行链路及上行链路上的零个、一个或多个基站通信。下行链路(或正向链路)是指从基站到终端的通信链路，而上行链路(或反向链路)是指从终端到基站的通信链路。
对于集中式体系结构来说，系统控制器130耦合到基站110并为所述基站提供协调及控制。对于分布式体系结构来说，基站可根据需要彼此通信。
本文所述传输技术可用于各种无线通信系统，例如正交频分多址(OFDMA)系统、单载波频分多址(SC-FDMA)系统、频分多址(FDMA)系统、码分多址(CDMA)系统、时分多址(TDMA)系统、空分多址(SDMA)系统等等。OFDMA系统利用正交频分多路复用(OFDM)，其是一种将总系统带宽分割成多个(K个)正交副载波的多载波调制技术。所述副载波也可称作音调(tone)、频率组等等。对于OFDM来说，每一副载波均与可借助数据调制的各自副载波相关联。SC-FDMA系统可利用交错FDMA(IFDMA)在分布于整个系统带宽上的副载波上进行传输，利用本地化FDMA(LFDMA)在毗邻副载波区块上进行传输，或利用增强型FDMA(EFDMA)在多个毗邻副载波区块上进行传输。一般来说，在OFDM的频域中及在SC-FDMA的时域中发送调制符号。
如下所述，可在一个符号周期内为一个发射天线产生OFDM符号。将N个调制符号映射到N个用于传输的副载波(或N个所指派副载波)，且将信号值为零的零个符号映射到剩余K-N个副载波。对所述K个调制符号及零符号执行K点快速傅立叶逆转换(IFFT)或离散傅立叶逆转换(IDFT)以获得K个时域样本的序列。将所述序列的最后Q个样本复制到所述序列的开头以形成含有K+Q个样本的OFDM符号。所述Q个经复制样本通常称作循环前缀或保护间隔，且Q是循环前缀长度。循环前缀用于克服因频率选择性衰落(其是在整个系统带宽内变化的频率响应)所致的符号间干扰(ISI)。
如下所述，可在一个符号周期内为一个发射天线产生SC-FDMA符号。用N点快速傅立叶变换(EFT)或离散傅立叶变换(DFT)将将要在N个所指派副载波上发送的N个调制符号变换到频域以获得N个频域符号。将所述N个频域符号映射到N个所指派副载波，且将零符号映射剩余的K-N个副载波。随后对所述K个频域符号及零符号实施K点IFFT或IDFT以获得K个时域样本的序列。将所述序列的最后Q个样本复制到所述序列的开头以形成含有K+Q个样本的SC-FDMA符号。
传输符号可以是OFDM符号或SC-FDMA符号。在K+Q个样本/码片周期内传发射传输符号的K+Q个样本。符号周期是一个传输符号的持续时间且等于K+Q个样本/码片周期。
本文所述传输技术可用于下行链路以及上行链路。为清晰起见，下文说明的大部分是针对从基站(发射机)到一个或多个终端(接收机)的下行链路传输。对于每一副载波来说，基站可不借助SDMA而传输到一个终端或借助SDMA传输到多个终端。
图2A显示由基站110处的多个(T个)发射天线112a到112t及终端120x处的单个接收天线122x形成的多输入单输出(MISO)信道。所述MISO信道可由每一副载波k的1xT的信道响应行向量h(k)来表征，其中可由下式给出：
h(k)＝[h1(k)h2(k)...hT(k)]， 方程式(1)
其中hi(k)(i＝1，...，T)表示副载波k的发射天线i与所述单个接收天线之间的耦合信道增益或复合信道增益。
图2B显示由基站110处的T个发射天线112a到112t及终端120y处的多个(R个)接收天线122a到122r形成的多输入多输出(MIMO)信道。所述MIMO信道可由每一副载波k的R x T信道响应矩阵H(k)来表征，其中可由下式给出：
方程式(2)
其中hj，i(k)(j＝1，...，R且i＝1，...，T)表示副载波k的发射天线i与接收天线j之间的复合信道增益；且
h i(k)是发射天线i的R x 1信道响应向量，发射天线i是H(k)的第i列。
发射机可在每一符号周期内在每一副载波上从T个发射天线发射一个或多个输出符号。每一输出符号可以是OFDM的调制符号、SC-FDMA的频域符号或某些其它复值。数据传输可由下述度量来量化：
·空间多路复用阶数(M)-在一个符号周期内经由T个发射天线在一个副载波上传输的输出符号数量；
·空间分集阶数(D)-所发射输出符号遵守的空间分集量；及
·信道估计开销阶数(C)-接收机针对每一接收天线所估计的虚拟天线数量。
一般来说，M≤min{T，R}，D≤T且C≤T。空间分集是指使用多个发射天线所得的传输分集且不包括使用多个接收天线所得的接收分集。
如果发射机直接从所述T个发射天线发射输出符号，则接收机通常需要估计所有T个发射天线的全部信道响应以还原数据传输。则信道估计开销阶数为C＝T。在某些情况中，(例如)如果信道条件不良，则可需要同时发射少于T个的输出符号。可使用所述T个发射天线的子集来发射少于T个的输出符号。然而，这并不合需要，这是因为可用于未使用的发射天线的发射功率并未适宜地用于传输。
本文所述传输方案容许灵活选择三个度量M、D及C，以实现数据传输在不同条件下的良好性能。举例来说，可针对具有高SNR的良好信道条件选择较大的空间多路复用阶数M，而针对具有低SNR的不良信道条件可选择较小的空间多路复用阶数。(例如)可在因低SNR导致的低通过量不能证明大信道估计开销正确的情况下选择较低的信道估计开销阶数C。
不论正发送的输出符号数量及无论使用哪些副载波进行传输，本文所述传输方案均可利用所有T个发射天线进行传输。此能力容许发射机(例如)通过利用耦合到每一天线的功率放大器来利用可用于所述T个发射天线的所有发射功率进行传输，这通常会改良性能。使用少于T个发射天线进行传输通常导致使用少于所有可用发射功率进行传输，这将影响性能。
本文所述传输方案可易于支持MIMO、单输入多输出(SIMO)及单输入单输出(SISO)传输。MIMO传输是在一个符号周期内于一个副载波上多个输出符号从多个虚拟天线到多个接收天线的传输。SIMO传输是在一个符号周期内于一个副载波上单个输出符号从一个虚拟天线到多个接收天线的传输。SISO传输是在一个符号周期内于一个副载波上单个输出符号从一个虚拟天线到一个接收天线的传输。发射机还可在一个符号周期内将MIMO、SIMO及/或SISO传输的组合发送到一个或多个接收机。
发射机可使用各种传输方案在一个符号周期内于一个副载波上从所述T个发射天线同时发射M个输出符号。在一个实施例中，发射机按下式处理所述输出符号以供传输：
x(k)＝U·P(k)·s(k)， 方程式(3)
其中s(k)是含有M个将要在一个符号周期内于副载波k上发送的输出符号的M x1向量；
P(k)是副载波k的V×M置换矩阵；
U ＝[u 1 u2...u v]是T×V规范正交矩阵；且
x(k)是含有T个将要在一个符号周期内于副载波k上从T个发射天线发送的发射符号的T×1向量。
V是借助规范正交矩阵U所形成的虚拟天线的数量。一般来说，1≤M≤V≤T。V可以是固定值或可配置值。
规范正交矩阵U是由属性U H·U＝I表征，其中“H”表示共轭转置且I是单位矩阵(identity matrix)。U的V个列彼此正交，且每一列均具有单位功率(unit power)。在一个实施例中，U经定义以使每一行中的V个项的平方和等于常数值。这种属性导致将均等发射功率用于所有T个发射天线。U还可以是由属性U H·U＝U·U H＝I表征的酉矩阵(unitarymatrix)。可如下文所述形成规范正交矩阵及酉矩阵。U的V个列可用于形成在一个符号周期内于一个副载波上发送多达V个输出符号的V个虚拟天线。所述虚拟天线还可称作有效天线或某一其它术语。
在一个实施例中，在所有符号周期内将单个规范正交矩阵U用于所有总计K个副载波，以使U并非副载波索引k或符号索引n的函数。在另一个实施例中，将不同的规范正交矩阵用于可指派给不同接收机的不同副载波组。在再一个实施例中，将不同的规范正交矩阵用于不同的副载波。在再一个实施例中，将不同的规范正交矩阵用于不同的时间间隔，其中每一时间间隔可跨越一个或多个符号周期。在再一个实施例中，如下文所述，自多个规范正交矩阵中选择一个或多个规范正交矩阵以供使用。一般来说，可使用一个或多个规范正交矩阵传输数据及导频，以使接收机能够基于所述导频估计信道响应并使用所述信道响应估计值来还原发送到所述接收机的数据。
置换矩阵P(k)从V个可供使用的虚拟天线中选择哪M个虚拟天线将用于副载波k，或U的所述V个列中的哪M个列。如下文所述，可以各种方式定义置换矩阵P(k)，且不同的置换矩阵可用于不同的副载波。
图3显示由方程序(3)给出的传输方案的模型300。发射机接收用于传输的每一副载波及符号周期的数据向量s(k)。虚拟天线映射器310处理数据向量s(k)并产生发射向量x(k)。在虚拟天线映射器310内，符号到虚拟天线映射单元312将数据向量s(k)与置换矩阵P(k)相乘，并产生V x 1中间向量。空间扩展单元314将所述中间向量与规范正交矩阵U相乘，并产生发射向量x(k)。所述发射向量x(k)是从T个发射天线发射并经由MIMO信道350到达接收机处的R个接收天线。
接收机处的所接收符号可表述为：
r(k)＝H(k)·x(k)+n(k)，
＝H(k)·U·P(k)·s(k)+n(k)，
＝H eff(k)·P(k)·s(k)+n(k)，
＝H used(k)·s(k)+n(k)，
方程式(4)
其中r(k)是含有在一个符号周期中于副载波k上来自R个接收天线的R个所接收符号的R x 1向量；
H cff(k)是副载波k的R×V有效信道响应矩阵；
H used(k)是副载波k的R×M所使用信道响应矩阵；且
n(k)是副载波k的R×1噪声矩阵。
有效及所使用信道响应矩阵可由下列各式给出：
H eff(k)＝H(k)·U，
＝[H(k)·u 1 H(k)·u 2...H(k)·u V]，及
方程式(5)
H used(k)＝H eff(k)·P(k)，
＝[H(k)·u (1) H(k)·u (2)...H(k)·u (M)]，
方程式(6)
其中
如方程序(3)中所示及图3中所图解说明，通过使用规范正交矩阵U形成具有V个虚拟天线的有效MIMO信道。在所有V个虚拟天线或其子集上发送数据。所使用的MIMO信道是由M个用于传输的虚拟天线形成。
对于上文所述的传输方案来说，R x T MIMO系统被有效地减少为R x V MIMO系统。所述发射机表现为其好像具有V个虚拟天线而非T个发射天线，其中V≤T。这种传输方案将信道估计开销阶数降低到C＝V。然而，空间多路复用阶数限定于V，或M≤V，且空间分集阶数也限定于V，或D≤V。
上述说明是针对一个副载波k。发射机还可针对用于传输的每一副载波实施相同处理。每一虚拟天线在副载波上的频率分集与物理发射天线的频率分集相同。然而，空间分集从T降低为V。
在另一个实施例中，发射机按下式处理输出符号以供传输：
方程式(7)
其中D(k)是副载波k的T x T对角矩阵。D(k)用于实现循环延迟分集，这会改良虚拟天线的频率选择性并可改良空间分集阶数到V与T之间的某处。循环延迟分集可在时域或频域中实现。
可通过将每一发射天线i的K个时域样本(从K点IDFT或IFFT获得)的序列循环地移位(或循环地延迟)为Ti(i＝1，...，T)的延迟而在时域中实现循环延迟分集。举例来说，可将T定义为Ti＝(i-1)·J，其中J可等于一个样本周期、样本周期的一部分或多于一个的样本周期。J可经选择以使每一虚拟天线的信道脉冲响应预期短于循环前缀长度。可通过将K个时域样本的序列中的最后X个样本移动到所述序列的开头而实现X个样本的循环延迟。将所述T个发射天线的时域样本循环延迟不同的量。可在应用循环延迟后附加循环前缀以保证所述总计K个副载波之间的正交性。
还可通过在每一发射天线的总计K个副载波上应用相位斜坡(或渐进相移)而在频域内实现循环延迟分集。将T个不同的相位斜坡用于T个发射天线以针对所述天线实现K个不同的循环延迟。每一副载波k的对角矩阵D(k)可按下式定义：
其中k＝1，...，K.方程式(8)
如方程序(8)所指示，发射天线1在总计K个副载波上具有0相位斜率，发射天线2在总计K个副载波上具有2π·J/T相位斜率，等等，且发射天线T在总计K个副载波上具有2π·(T-1)·J/T相位斜率。对角矩阵D(k)及规范正交矩阵U也可经组合以获得新规范正交矩阵U(k)＝D(k)·U，其中U(k)可应用于数据向量s(k)。
具有循环延迟分集的所接收符号可由下式表述：
方程式(9)
其中具有循环延迟分集的R x 1所接收向量；
是具有循环延迟分集的R x V有效信道响应矩阵；且
是具有循环延迟分集的R x M所使用信道响应矩阵。
有效及所使用信道响应矩阵可由下列各式给出：
及 方程式(10)
方程式(11)
图4显示由方程序(7)给出的传输方案的模型400。在虚拟天线映射器410中，符号到虚拟天线映射单元412将数据向量s(k)与置换矩阵P(k)相乘，并产生V x 1向量。空间扩展单元414将所述V x 1向量与规范正交矩阵U相乘，并产生T x 1向量。循环延迟分集单元416将所述T x 1向量与对角矩阵D(k)相乘，并产生T x 1发射向量x(k)。所述发射向量x(k)是从T个发射天线发射并经由MIMO信道450到达接收机处的R个接收天线。
如方程序(7)中所示及图4中所图解说明，通过使用规范正交矩阵U及循环延迟分集形成具有V个虚拟天线的有效MIMO信道所使用MIMO信道是由M个用于传输的虚拟天线形成。
方程序(3)及(7)假设均等发射功率用于在一个符号周期内于一个副载波上同时发送的M个输出符号。一般来说，可用于每一发射天线的发射功率可均匀地或不均匀地分布在用于传输的各副载波上。可用于每一副载波的T个发射天线的发射功率可均匀地或不均匀地分布到正在所述副载波上发送的M个输出符号。可通过按下式用对角增益矩阵G缩放数据向量s(k)来将不同发射功率用于所述M个输出符号：x(k)＝U·P(k)·G·s(k)或其中diag{G}＝{g1g2...gM}且gi是输出符号si的增益。
各种类型的矩阵可用于形成规范正交矩阵U。举例来说，U可以是基于傅立叶矩阵、沃尔什矩阵或某一其它矩阵形成。T x T傅立叶矩阵F TxT在第m行第n列中具有元素fn，m，所述元素可由下式表述：
方程式(12)
可形成任一正方维度(例如2、3、4、5、6等等)的傅立叶矩阵。2x2沃尔什矩阵W 2x2及更大尺寸的沃尔什矩阵W 2Nx2N可由下列各式表述：
及 方程式(13)
在一个实施例中，规范正交矩阵U等于含有T x T傅立叶矩阵或T x T沃尔什矩阵的V个列的矩阵。在另一个实施例中，U按下式形成：
U＝Λ·F， 方程式(14)
其中F是含有T×T傅立叶矩阵的第一V列的T×V矩阵；且
Λ是含有用于F的T行的T个缩放值的T×T对角矩阵。
举例来说，可将对角矩阵Λ定义为其中θi(i＝1，...，T)可以是随机相位。方程序(14)将F的列与随机相位相乘，这改变由F的列所描绘的空间方向。在再一个实施例中，U是具有伪随机要素(例如具有单位大小及伪随机相位)的规范正交矩阵。
发射机可在一组副载波(称作所指派副载波)上将MIMO、SIMO或SISO传输发送到接收机。所述总计K个副载波可分割为多个不重叠的副载波组。在这种情况下，发射机可在多个副载波组上同时发射到多个接收机。发射机可将相同或不同类型的传输发送到所述多个接收机。举例来说，所述发射机可在第一副载波组上将MIMO传输发送到第一接收机，在第二副载波组上将SIMO传输发送到第二接收机，在第三副载波组上将SISO传输发送到第三接收机，等等。
可从由规范正交矩阵U的单个列所形成的单个虚拟天线发送SIMO或SISO传输。在这种情况中M＝V＝1，且有效MIMO信道变成具有h eff(k)＝H(k)·u 1或 的信道响应向量的R x 1SISO或SIMO信道。数据向量s(k)变成含有单个输出符号的1x1向量，置换矩阵P(k)变成含有单个“1”的1x1矩阵，且规范正交矩阵U变成含有单个列Tx1矩阵。
可从由规范正交矩阵U的多个列所形成的多个虚拟天线发送MIMO传输。如果输出符号的数量少于虚拟天线的数量(或M＜S)，则可以各种方式选择所述M个虚拟天线以供使用。
图5显示用于从所述V个虚拟天线循环发射输出符号的实施例。对于这一实施例来说，在第一个所指派副载波上从虚拟天线1到M发送第一M个输出符号，在下一个所指派副载波上自虚拟天线2到M+1发送下一M个输出符号，等等。可给予所指派副载波为k＝1，2，...的索引。对于图5中所示实施例来说，将用于副载波k+1的M个虚拟天线与用于副载波k的M个虚拟天线偏置一个。所选虚拟天线在到达最后一个虚拟天线时绕回到虚拟天线1。因此，虚拟天线((k-1)mod V)+1到((k+M-2)mod V)+1用于所指派副载波k，其中“mod S”表示以S为模操作，且“-1”及“+1”是由于所指派副载波的索引及所述虚拟天线的索引是以1开始而非以0开始。每一所指派副载波k的置换矩阵P(k)的M个列是V×V识别矩阵的((k-1，k，k+1，...，k+M-2)mod V)+1列。举例来说，如果M＝2且V＝3，则可将所述置换矩阵定义为：
等等 方程式(15)
在另一个实施例中，在第一个所指派副载波上从虚拟天线1到M发送第一M个输出符号，在下一个所指派副载波上自虚拟天线M+1到((2M-1)mod V)+1发送下一M个输出符号，等等。对于这一实施例来说，用于副载波k+1的M个虚拟天线开始于用于副载波k的最后一个虚拟天线后。在再一个实施例中，以伪随机方式(例如根据一伪随机数(PN)产生器或接收机也已知的序列)选择每一副载波的M个虚拟天线。
在再一个实施例中，基于来自接收机的反馈选择虚拟天线。举例来说，所述反馈可能指示用于所有所指派副载波的特定虚拟天线、用于每一个所指派副载波的特定虚拟天线，等等。在再一个实施例中，发射机可基于从所述接收机接收的导频或某一其它传输来选择虚拟天线。举例来说，发射机可基于所接收的导频估计上行链路信道响应，基于所述上行链路信道响应估计值来估计下行链路信道响应，并基于所述下行链路信道响应估计值来选择虚拟天线。在(例如)其中在相同频率信道上但不同的时间间隔内发送下行链路及上行链路传输的分时双工(TDD)系统中，下行链路及上行链路信道响应可以是类似的。
一般来说，可通过下述方式来选择虚拟天线：(1)由发射机在无来自接收机的反馈的情况下以确定性方式(例如循环地)或伪随机方式进行选择，(2)由发射机基于来自接收机的反馈进行选择，或(3)由接收机进行选择并发送到发射机。
规范正交矩阵U可以是固定，且可如上文所述选择借助U所形成的V个虚拟天线以供使用。在另一个实施例中，从可供使用的一组规范正交矩阵中选择一个或多个规范正交矩阵以供使用。所述组规范正交矩阵形成码本，且所述码本的一个或多个项可用于传输。所述组中的规范正交矩阵是彼此不同的(且可以是伪随机的)。举例来说，规范正交矩阵可经定义以针对不同的信道条件(例如低及高SNR条件、低及高移动率等等)提供良好性能。可为所有所指派副载波、为每一所指派副载波等等选择一个规范正交矩阵。可通过下述方式做出矩阵选择：(1)由发射机在有或无来自接收机的反馈的情况下做出选择或(2)由接收机做出选择并发送回发射机。可基于诸如信道条件、移动率、上行链路资源等各种因素做出矩阵选择。一般来说，码本中将用于传输的特定项或若干特定项可由发射机自主选择或根据来自接收机的反馈进行选择。
本文所述传输方案具有下述合意特征：
·容易选择虚拟天线数量的灵活性；
·发送高达可用虚拟天线数量的任一数量的输出符号的灵活性；及
·不论正在发送的输出符号数量及可用虚拟天线数量，所有T个发射天线均可用于传输的利用率。
虚拟天线(V)的数量可经选择以支持所需的空间多路复用阶数(M)，实现所需的空间分集阶数(D)及获得所需的信道估计开销阶数(C)。虚拟天线的数量可由发射机自主选择或根据来自接收机的反馈进行选择。所需的虚拟天线数量可通过借助正确列数量来定义规范正交矩阵U而容易地获得。
空间多路复用阶数受到发射天线数量及接收天线数量限制，或M≤min{T，R}。在某些情况(例如高SNR条件)下且如果受到接收器支持，则较高的空间多路复用阶数可以是合乎需要。在其它情况下(例如低SNR条件)或如果较高的空间多路复用阶数不受到接收机支持，则较低的空间多路复用阶数(例如M＝1)可以是合乎需要。可基于信道条件及/或其它因素动态地选择空间多路复用阶数。举例来说，如果SNR小于第一阈值，则可将空间多路复用阶数设为1，如果SNR在第一阈值与第二阈值之间，则可将空间多路复用阶数设为2，如果SNR在第二阈值与第三阈值之间，则可将空间多路复用阶数设为3，等等。虚拟天线数量经选择以等于或大于空间多路复用阶数，或V＞M。
一般来说，较高的空间分集阶数有益于改良性能，而较低的信道估计开销阶数有益于减少为信道估计传输导频所使用的链路资源量。信道估计开销阶数与空间分集阶数紧密相关，且两者均由虚拟天线数量决定。因此，可基于所需空间分集阶数、所需信道估计开销阶数、信道条件及/或其它因素动态地选择虚拟天线数量。
可以方式选择虚拟天线的数量。在一个实施例中，可将虚拟天线的数量设定为等于空间多路复用阶数，或V＝M。在另一个实施例中，可将虚拟天线的数量设定为最大可能值，以便将用于导频传输的链路资源维持在预定百分比的总链路资源之内在再一个实施例中，基于信道条件设定虚拟天线数量。举例来说，如果SNR小于第一值，则定义一个虚拟天线，如果SNR在所述第一值与第二值之间，则定义两个虚拟天线，等等。
本文所述传输方案可与各种副载波结构一起使用，其中某些将阐述于下文中。下述说明假设总计K个副载波可用于传输且给予为1到K的索引。
图6A显示交错副载波结构600。对于这种副载波结构来说，将总计K个副载波布置成S个不重叠交错，每一交错含有均匀分布在总计K个副载波上的N个副载波，且每一交错中的连贯副载波被S个副载波隔开，其中K＝S·N。交错u含有副载波u作为第一副载波，其中u∈{1，...，S}。
图6B显示区块副载波结构610。对于这种副载波结构来说，将总计K个副载波布置成S个不重叠区块，其中每一区块含有N个毗邻副载波，其中K＝S·N。区块v含有副载波v·N+1到(v+1)·N，其中v∈{1，...，S}。
图6C显示群组副载波结构620。对于这种副载波结构来说，将总计K个副载波布置成S个不重叠群组，每一群组含有G个分布于系统带宽上的子群组，且每一子群组含有L个毗邻副载波，其中K＝S·N且N＝G·L。可将所述总计K个副载波分割为G个频率范围，其中每一频率范围含有S·L个连贯副载波。每一频率范围进一步被分割为S个子群组，其中每一子群组含有L个连贯副载波。对于每一频率范围来说，将第一L个副载波分配给群组1，将下一L个副载波分配给群组2，等等，并将最后L个副载波分配给群组S。每一群组含有G个分别含有L个连贯副载波的子群组，或总计为N＝G·L个的副载波。
一般来说，本文所述传输技术可用于具有任何数量的副载波组的任何副载波结构。每一副载波组可包含可以任一方式布置的任何数量的副载波。举例来说，一副载波组可等同于交错、副载波区块、副载波群组等等。对于每一副载波组，(1)所述组内的各副载波可均匀或不均匀地分布于系统带宽上，(2)所述组内的各副载波可在一群组中彼此毗邻，或(3)所述组内的各副载波可分布于多个群组中，其中每一群组可定位于所述系统带宽内任何地方并可含有一个或多个副载波。
针对上文所述的所有副载波结构，可给不同的接收机指派不同的副载波组，且发射机可在其所指派副载波组上将数据发射到每一接收机。发射机可将相同的规范正交矩阵U用于所有接收机，将不同的规范正交矩阵用于每一接收机，将不同的规范正交矩阵用于每一副载波组，将不同的规范正交矩阵用于每一副载波，等等。
本文所述传输技术可与或不与频率跳跃一起使用。运用频率跳跃技术，数据传输随时间以伪随机或确定性方式从一个副载波跳跃到另一个副载波，这使数据传输能够更好地承受诸如窄频干扰、人为干扰(jamming)、衰落等有害信道条件。频率跳跃可提供频率分集及干扰随机化。可为接收机指派与跳跃模式(hop pattern)相关联的业务信道，所述跳跃模式指示在每一时隙中将使用哪一(哪些)组副载波(如果有)。跳跃模式也被称作频率跳跃模式或序列。时隙系在既定副载波上花费的时间量，且也称作跳跃周期。跳跃模式可以伪随机或确定性方式在不同时隙内选择不同组的副载波。
图7显示实例性频率跳跃方案700。在图7中，将业务信道1映射到特定的时间-频率区块序列。每一时间-频率区块均是特定时隙中的特定副载波集合。在图7所示实例中，将业务信道1映射到时隙1中的副载波组1、时隙2中的副载波组4等等。可将业务信道2到S映射到业务信道1的时间-频率区块序列的经垂直、循环移位版本。举例来说，可将业务信道2映射到时隙1中的副载波组2、时隙2中的副载波组5等等。
可将频率跳跃与图6A到6C中所示的副载波结构中的任一者结合使用。举例来说，符号率跳跃方案可被定义为其中在每一符号周期内每一时间-频率区块是特定交错。对于这种跳跃方案来说，所指派副载波跨越整个系统带宽且在符号周期之间发生变化。作为另一个实例，区块跳跃方案可被定义为其中在包含多个符号周期的时隙内每一时间-频率区块是特定副载波区块。对于这种跳跃方案来说，所指派副载波相互毗邻且对于整个时隙来说是固定的，但在时隙之间发生变化。对于所述区块跳跃方案来说，可将空间多路复用阶数设定为等于虚拟天线数量，从而可在具有同步扇区的系统的任一扇区内任一既定时间-频率区块上观测到恒定干扰。也可定义其它跳跃方案。
可借助上文所述副载波结构以各种方式传输导频。符号率跳跃及区块跳跃的一些实例性导频方案阐述如下。
图8显示用于符号率跳跃的实例性导频方案。对于导频方案800来说，发射机在每一符号周期内在一个交错上从虚拟天线1发射共用导频。如图8所示，发射机可在不同的符号周期内于不同交错上发射共用导频。此种错列导频允许接收机在更多副载波上对频谱取样，并由此推导出更长的信道脉冲响应估计值。发射机还可在一个或多个交错上从剩余的虚拟天线发射辅助导频，以允许MIMO接收机估计所有用于传输的虚拟天线的信道响应。对于图8所示实施例来说，发射机在每一符号周期内在一个交错上发射所述辅助导频，并在V-1个不同符号周期内循环经过虚拟天线2到V。对于如图8中所示V＝4的情况，发射机在符号周期n+1中从虚拟天线2发射所述辅助导频，然后在符号周期n+2中从虚拟天线3发射所述辅助导频，随后在符号周期n+3中从虚拟天线4发射所述辅助导频，随后在符号周期n+4中从虚拟天线2发射所述辅助导频，等等。
发射机可以其它方式发射共用及辅助导频。在另一个实施例中，将辅助导频错列并在不同的副载波组上发送。在再一个实施例中，在一个或多个副载波组上发送共用导频，所述一个或多个副载波组相对于用于辅助导频的一个或多个副载波组是伪随机(或具有随机偏置)。
发射机可为MIMO、SIMO及SISO接收机发射共用导频且可仅当存在MIMO接收机时发射辅助导频。MIMO、SIMO及SISO接收机可使用共用导频为虚拟天线1的总计K个副载波推导出信道估计值。MIMO接收机可使用所述辅助导频推导出虚拟天线2到V的信道估计值。
图9A显示一种用于区块跳跃的实例性导频方案910。对图9A中所示实施例来说，一个时间-频率区块由16个毗邻副载波k+1到k+16组成且进一步跨8个符号周期n+1到n+8。对于导频方案910来说，发射机在符号周期n+1到n+3及n+6到n+8中的每一者中在副载波k+3、k+9及k+15上发射专用导频，或6条各3个导频符号。可从任一虚拟天线发送每一导频符号。举例来说，如果V＝3，则发射机可在符号周期n+1及n+6中从虚拟天线1发射所述导频，在符号周期n+2及n+7中从虚拟天线2发射所述导频，及在符号周期n+3及n+8中从虚拟天线3发射所述导频。
图9B显示一种用于区块跳跃的实例性导频方案920。对于导频方案920来说，所述发射机在符号周期n+1到n+8中的每一者内在副载波k+3、k+9及k+15上发射专用导频，或3条各8个导频符号。可从任一虚拟天线发送每一导频符号。举例来说，如果V＝4，则所述发射机可在符号周期n+1及n+5中从虚拟天线1发射导频，在符号周期n+2及n+6中从虚拟天线2发射导频，在符号奏起n+3及n+7中从虚拟天线3发射导频，及在符号周期n+4及n+8中从虚拟天线4发射导频。
图9C显示用于区块跳跃的实例性导频方案930。对于导频方案930来说，发射机在符号周期n+1、n+2、n+1及n+8中在副载波k+1、k+4、k+1、k+10、k+13及k+16上发射专用导频。可从任一虚拟天线发送每一导频符号。举例来说，发射机可在符号周期n+1内从虚拟天线1发射所述导频，在符号周期n+2内从虚拟天线2发射所述导频，在符号周期内n+7从虚拟天线1或3发射所述导频，并在符号周期n+8内从虚拟天线2或4发射所述导频。
图9D显示用于区块跳跃的实例性导频方案940。对于导频方案940来说，发射机在每一符号周期内于三个副载波上发射错列导频，并在不同的符号周期内于不同导频副载波上进行发射。可自任一虚拟天线发送每一导频符号。举例来说，发射机可在每一符号周期内从不同的虚拟天线发射所述导频，并可在V个符号周期内循环经过所述V个虚拟天线。
一般来说，对于所述区块跳跃方案，发射机可在每一时间-频率区块中发射导频，以使接收机能够为用于传输的每一虚拟天线推导出信道估计值。图9A到9D显示四个可供使用的实例性导频模式。也可定义其它导频模式并将其用于导频传输。
对于符号率跳跃及区块跳跃两者来说，发射机均可自任一数量的虚拟天线发射所述导频，可将任一数量的导频副载波用于每一虚拟天线，并将任一数量的发射功率用于每一虚拟天线。如果从多个虚拟天线发送所述导频，则发射机可将相同或不同数量的副载波用于所述虚拟天线，且可以相同或不同功率电平为所述虚拟天线发射所述导频。发射机可为每一虚拟天线交错所述导频，但也可不交错。发射机可在更多副载波上发射所述导频，以使接收机获得对频域内无线信道的更多“关注”，并推导出更长的信道脉冲响应估计值。如上文所述，发射机可在每一符号周期内在所有导频副载波上从一个虚拟天线发射所述导频。或者，发射机可在一既定符号周期内在多个副载波子集上从多个虚拟天线发射所述导频。
在一个实施例中，如图8到9D所述，发射机从若干虚拟天线发射所述导频。在另一个实施例中，发射机从若干物理天线发射所述导频而不应用规范正交矩阵U或置换矩阵P(k)。对于这种实施例，接收机可基于所述导频估计实际信道响应，且然后可基于所述实际信道响应估计值及规范正交矩阵与置换矩阵推导出有效信道响应估计值。
图10显示一种用于将数据及导频发射到一个或多个接收机的过程1000。对每一接收机的处理可如下实施。确定指派给所述接收机的副载波组及所述接收机的空间多路复用阶数(M)，其中M≥1(区块1012)。对于每一所指派副载波来说，从借助规范正交矩阵U的V个列形成的V个虚拟天线中选择M个虚拟天线以供使用，其中V≥M(区块1014)。如上文所述，可以各种方式选择用于每一所指派副载波的M个虚拟天线。通过应用所述规范正交矩阵将所述接收机的输出符号映射到为每一所指派副载波选择的M个虚拟天线(区块1016)。提供经映射的输出符号(或发射符号)以供从T个发射天线进行传输，其中T≥V(区块1018)。
还将导频符号映射到所述用于传输的虚拟天线(区块1020)。举例来说，可在第一组导频副载波上将共用导频的导频符号映射到第一虚拟天线，并在第二组导频副载波上将辅助导频的导频符号映射到剩余的虚拟天线。
如果存在多个接收机，则可将相同或不同的空间多路复用阶数用于所述接收机。此外，可在不同的副载波组上将数据同时发送到多个接收机。举例来说，可将数据在第一组副载波上从一个虚拟天线发送到SIMO或SISO接收机，在第二组副载波上从多个虚拟天线发送到MIMO接收机，等等。在任一情况中，将所有接收机的发射符号均解多路复用到T个发射天线(区块1022)。对于每一发射天线来说，将每一接收机的发射符号映射到指派给所述接收机的副载波(同样为区块1022)。然后，基于所述发射天线的发射符号并使用(例如)OFDM或SC-FDMA为每一发射天线产生传输符号(区块1024)。可对所述T个发射天线应用不同的循环延迟，例如通过将每一发射天线的传输符号循环延迟不同量(区块1026)。
对于图10中的区块1016来说，基于从V个可供使用的映射模式中选择的M个映射模式将指派给每一接收机的每一副载波的所述(等)输出符号映射到T个发射天线。每一映射模式指示输出符号到所述T个发射天线的特定映射。所述V个映射模式可由规范正交矩阵的V个列形成，或以其它方式形成。可(例如)基于预定模式在既定符号周期内及/或不同的符号周期内为不同的副载波选择不同的映射模式。所述预定模式可由置换矩阵或以某一其它方式定义。所述预定模式可在不同的副载波及/或符号周期内循环经过所述V个可用映射模式。
图11显示一种用于将数据及导频发射到一个或多个接收机的设备1100的实施例。设备1100包含：用于确定指派给每一接收机的副载波组及每一接收机的空间多路复用阶数(M)(区块1112)的装置；用于从V个虚拟天线中为指派给每一接收机的每一副载波选择M个虚拟天线以供使用(区块1114)的装置；用于(例如通过应用规范正交矩阵的所选列或所选映射模式)将每一接收机的输出符号映射到为指派给所述接收机的每一副载波所选的虚拟天线(区块1116)的装置；用于提供经映射的输出符号(或发射符号)以供从T个发射天线传输(区块1118)的装置；用于将导频符号映射到虚拟天线以供传输(区块1120)的装置；用于将每一接收机的发射符号解多路复用到所述T个发射天线的所指派副载波(区块1122)的装置；用于(例如)使用OFDM或SC-FDMA为每一发射天线产生传输符号(区块1124)的装置；及用于对所述T个发射天线应用不同的循环延迟(区块1126)的装置。
图12显示基站110、单天线终端120x及多天线终端120y的实施例的方块图。在基站110处，发射(TX)数据处理器1210接收一个或多个终端的数据，根据一个或多个编码及调制方案处理(例如编码、交错及符号映射)所述数据，并提供调制符号。TX数据处理器1210通常基于选择用于所述终端的编码及调制方案单独地为每一终端处理数据。如果系统100利用SC-FDMA，则TX数据处理器1210可对每一终端的调制符号实施FFT/DFT以获得所述终端的频域符号。TX数据处理器1210获得每一终端的输出符号(其可以是OFDM的调制符号或SC-FDMA的频域符号)并将所述终端的输出符号多路复用到用于所述终端的副载波及虚拟天线上。TX数据处理器1210进一步将导频符号多路复用到用于导频传输的副载波及虚拟天线上。
TX空间处理器1220接收所述经多路复用的输出符号及导频符号，对每一副载波实施空间处理(例如，如方程序(3)或(7)中所示)，并为所述T个发射天线提供发射符号。调制器(Mod)1222针对(例如)OFDM、SC-FDMA或某一其它调制技术处理每一发射天线的发射符号，并为彼发射天线产生输出样本流。由于TX空间处理器1220对每一副载波实施空间处理，因而将SC-FDMA调制分为分别由TX数据处理器1210及调制器1222实施的两个部分。调制器1222将T个输出样本流提供给T个发射单元(TMTR)1224a到1224t。每一发射单元1224均处理(例如转换为模拟、放大、滤波及增频转换)其输出样本流，并产生经调制信号。分别自T个天线112a到112t发射来自发射单元1224a到1224t的T个经调制信号。
在每一终端120处，一个或多个天线122接收基站110发射的经调制信号，且每一天线分别将所接收信号提供给接收单元(RCVR)1254。每一接收单元1254处理(例如放大、滤波、降频转换及数字化)其接收信号，并将所接收样本提供给解调器(Demod)1256。解调器1256(例如基于OFDM、SC-FDMA或某一其它调制技术)处理每一接收天线122的所接收样本，获得所述总计K个副载波的频域接收符号，为所指派副载波提供所接收符号，并为所述用于导频传输的副载波提供所接收导频符号。
对于单天线终端120x来说，数据检测器1260x自解调器1256x获得所接收符号，基于所接收导频符号推导所指派副载波的信道估计值，并基于所述信道估计值对所接收符号实施数据检测(例如平等化)以获得经检测符号，其中所述经检测符号是发射到终端120x的输出符号的估计值。对于多天线终端120y来说，接收(RX)空间处理器1260y从解调器1256y获得所接收符号，根据所接收导频符号推导所指派副载波的信道估计值，并根据所述信道估计值对所接收符号实施接收机空间处理以获得经检测符号。RX空间处理器1260y可实施最小均方差(MMSE)技术、强制归零(ZF)技术、最大比率组合(MRC)技术、连续干扰消除技术或某一其它接收机处理技术。对于每一终端来说，RX数据处理器1262处理(例如符号解映射、解交错及解码)所检测符号，并为终端提供经解码符号。一般来说，每一终端120所实施处理与由基站110所实施处理互补。
每一终端120可针对到所述终端的数据传输产生反馈信息。举例来说，每一终端120可(例如)基于所接收导频符号估计虚拟天线的SNR。每一终端120可根据所述SNR估计值及/或其它信息选择一个或多个编码及调制方案、一个或多个包格式、一个或多个用于数据传输的虚拟天线、一个或多个规范正交矩阵等等。每一终端120还可针对正确接收的数据包产生确认信息(ACK)。反馈信息可包含SNR估计值、所选编码及调制方案、所选虚拟天线、所选规范正交矩阵、所选副载波、ACK、用于功率控制的信息、某一其它信息或其任一组合。所述反馈信息由TX数据处理器1280处理，且如果存在多个天线则进一步由TX空间处理器1282处理，由调制器1284调制，由发射单元1254调整，并经由天线122发送到基站110。在基站110处，终端120x及120y所发射的经调制信号由天线112接收，由接收单元1224调整，并由解调器1240、RX空间处理器1242及RX数据处理器1244处理以还原由终端发送的反馈信息。控制器/处理器1230使用所述反馈信息确定用于到每一终端的数据传输的数据率及编码和调制方案，并产生用于TX数据处理器1210及TX空间处理器1220的各种控制。
控制器/处理器1230、1270x及1270y分别控制基站110及终端120x及120y的各种处理单元的操作。存储器单元1232、1272x及1272y分别储存基站110及终端120x及120y所使用的数据及程序代码。控制器/处理器1230可实施图10及11的部分，并可(1)为每一终端指派副载波并选择空间多路复用阶数(图10中区块1012)及(2)为指派给每一终端的副载波选择虚拟天线(图10中区块1214)。TX数据处理器1220可实施图10及11的部分，并可实施图10中区块1116到1126中所示的处理。
为清晰起见，上述大部分说明系针对具有总计K个副载波的系统。本文所述传输技术也可用于具有单个副载波的系统。对于这种系统，上述说明中的k可作为符号周期而非副载波的索引。
可通过各种手段来实施本文所述的传输技术。举例来说，所述技术可实施于硬件、固件、软件或其组合中。对于硬件实施方案来说，发射机的各处理单元可实施于一个或多个专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理装置(DSPD)、可编程逻辑装置(PLD)、现场可编程门阵列(FPGA)、处理器、控制器、微控制器、微处理器、电子装置、其它设计用于实施本文所述功能的电子单元、或其组合中。接收机处的各处理单元也可实施于一个或多个ASIC、DSP、处理器等中。
对于软件实施方案来说，可借助能实施本文所述功能的模块(例如程序、功能等等)来实施所述传输技术。软件程序代码可储存于存储器(例如图12中的存储器1230、1272x或1272y)中并由处理器(例如处理器1232、1270x或1270y)执行。所述存储器既可实施于处理器内部也可实施于处理器外部。
提供上述对所揭示实施例的阐述以使任一所属技术领域的技术人员均能够制作或使用本发明。所述实施例的各种修改对于所属技术领域的技术人员而言将是显而易见的，且本文所界定的一般原理也可适用于其它实施例，这并不背离本发明的精神或范围。因此，本文并不希望将本发明限定于本文所示的实施例，而是希望赋予其与本文所揭示原理及新颖特征相一致的最宽广范围。

Claims (18)

1.一种用于天线选择的设备，其包含：
至少一个处理器，其经配置以：
接收数据矢量；
从接收器接收反馈；
基于所述反馈选择表示天线端口的多个虚拟天线；
形成指示所选择的多个虚拟天线的置换矩阵；
将所述置换矩阵应用于所述数据矢量，以产生输出符号；及
将所述输出符号提供至所述天线端口；以及
存储器，其耦合至所述至少一个处理器。
2.如权利要求1所述的设备，其中所述至少一个处理器进一步经配置以使用规范正交矩阵来形成所述多个虚拟天线。
3.如权利要求2所述的设备，其中所述至少一个处理器进一步经配置以从可用的多个规范正交矩阵中选择所述规范正交矩阵来形成所述多个虚拟天线。
4.如权利要求3所述的设备，其中所述至少一个处理器进一步经配置以基于所述反馈从所述可用的多个规范正交矩阵中选择所述规范正交矩阵来形成所述多个虚拟天线。
5.如权利要求1所述的设备，其进一步包括与所述至少一个处理器集成的至少一个基站或终端。
6.如权利要求1所述的设备，其中所述多个虚拟天线包含V个虚拟发射天线，所述多个发射天线包含T个发射天线，所述至少一个处理器经配置以使用T×V规范正交矩阵来形成所述V个虚拟发射天线，且所述至少一个处理器进一步经配置以定义所述T×V规范正交矩阵，以使所述T×V规范正交矩阵的每一行中的V个项的平方和等于常数值。
7.如权利要求1所述的设备，其中所述反馈指示所述多个虚拟天线中的用于所有所指派的副载波的特定虚拟天线。
8.如权利要求1所述的设备，其中所述反馈指示所述多个虚拟天线中的用于每一个所指派的副载波的特定虚拟天线。
9.如权利要求1所述的设备，其中所述至少一个处理器进一步经配置以：
基于接收到的导频估计上行链路信道响应；
基于上行链路信道响应估计来估计下行链路信道响应；及
使用下行链路信道响应估计来选择所述多个虚拟天线。
10.一种用于天线选择的方法，其包括：
接收数据矢量；
从接收器接收反馈；
基于所述反馈选择表示天线端口的多个虚拟天线；
形成指示所选择的多个虚拟天线的置换矩阵；
将所述置换矩阵应用于所述数据矢量，以产生输出符号；及
将所述输出符号提供至所述天线端口。
11.如权利要求10所述的方法，其进一步包括使用规范正交矩阵来形成所述多个虚拟天线。
12.如权利要求11所述的方法，其进一步包括从可用的多个规范正交矩阵中选择所述规范正交矩阵来形成所述多个虚拟天线。
13.如权利要求12所述的方法，其进一步包括基于所述反馈从所述可用的多个规范正交矩阵中选择所述规范正交矩阵来形成所述多个虚拟天线。
14.一种用于天线选择的设备，其包括：
用于接收数据矢量的装置；
用于从接收器接收反馈的装置；
用于基于所述反馈选择表示天线端口的多个虚拟天线的装置；
用于形成指示所选择的多个虚拟天线的置换矩阵的装置；
用于将所述置换矩阵应用于所述数据矢量以产生输出符号的装置；及
用于将所述输出符号提供至所述天线端口的装置。
15.如权利要求14所述的设备，其进一步包括用于使用规范正交矩阵来形成所述多个虚拟天线的装置。
16.如权利要求15所述的设备，其进一步包括用于从可用的多个规范正交矩阵中选择所述规范正交矩阵来形成所述多个虚拟天线的装置。
17.如权利要求16所述的设备，其进一步包括用于基于所述反馈从所述可用的多个规范正交矩阵中选择所述规范正交矩阵来形成所述多个虚拟天线的装置。
18.如权利要求14所述的设备，其进一步包括与所述用于接收数据矢量的装置集成的至少一个基站或终端。
CN201510024446.2A 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备 Active CN104601212B (zh)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US71040805P 2005-08-22 2005-08-22
US60/710,408 2005-08-22
US71114405P 2005-08-24 2005-08-24
US60/711,144 2005-08-24
US11/261,823 2005-10-27
US11/261,823 US20070041457A1 (en) 2005-08-22 2005-10-27 Method and apparatus for providing antenna diversity in a wireless communication system
CN200680038384.XA CN101288245B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN200680038384.XA Division CN101288245B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备

Publications (2)

Publication Number Publication Date
CN104601212A CN104601212A (zh) 2015-05-06
CN104601212B true CN104601212B (zh) 2018-04-27

Family

ID=37395918

Family Applications (5)

Application Number Title Priority Date Filing Date
CN201510024440.5A Active CN104660317B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备
CN201510024569.6A Active CN104618004B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备
CN200680038384.XA Active CN101288245B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备
CN201510024446.2A Active CN104601212B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备
CN201510024343.6A Active CN104660316B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备

Family Applications Before (3)

Application Number Title Priority Date Filing Date
CN201510024440.5A Active CN104660317B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备
CN201510024569.6A Active CN104618004B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备
CN200680038384.XA Active CN101288245B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201510024343.6A Active CN104660316B (zh) 2005-08-22 2006-08-22 用于多输入多输出系统中的天线选择的方法和设备

Country Status (9)

Country Link
US (4) US20070041457A1 (zh)
EP (1) EP1917736B1 (zh)
JP (6) JP5405108B2 (zh)
KR (1) KR100954485B1 (zh)
CN (5) CN104660317B (zh)
CL (2) CL2009000738A1 (zh)
ES (1) ES2525474T3 (zh)
TW (1) TWI358216B (zh)
WO (1) WO2007024935A2 (zh)

Families Citing this family (174)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9130810B2 (en) 2000-09-13 2015-09-08 Qualcomm Incorporated OFDM communications methods and apparatus
US7295509B2 (en) 2000-09-13 2007-11-13 Qualcomm, Incorporated Signaling method in an OFDM multiple access system
US20030204602A1 (en) * 2002-04-26 2003-10-30 Hudson Michael D. Mediated multi-source peer content delivery network architecture
EP1511212B1 (en) * 2003-08-29 2007-03-07 Mitsubishi Electric Information Technology Centre Europe B.V. Method for transmitting optimally interleaved data in a MIMO telecommunication system
US9137822B2 (en) * 2004-07-21 2015-09-15 Qualcomm Incorporated Efficient signaling over access channel
US9148256B2 (en) 2004-07-21 2015-09-29 Qualcomm Incorporated Performance based rank prediction for MIMO design
EP2323305A3 (en) * 2004-09-27 2012-08-15 Sharp Kabushiki Kaisha Radio transmission device
ATE476028T1 (de) * 2004-12-13 2010-08-15 Mitsubishi Electric Corp Verfahren, system und vorrichtung zur gleichmässig verteilten datenübertragung in mimo- übertragungssystemen
US9246560B2 (en) * 2005-03-10 2016-01-26 Qualcomm Incorporated Systems and methods for beamforming and rate control in a multi-input multi-output communication systems
US9154211B2 (en) * 2005-03-11 2015-10-06 Qualcomm Incorporated Systems and methods for beamforming feedback in multi antenna communication systems
US8724740B2 (en) * 2005-03-11 2014-05-13 Qualcomm Incorporated Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink MIMO channel data rates
US8995547B2 (en) * 2005-03-11 2015-03-31 Qualcomm Incorporated Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink MIMO channel data rates
US8446892B2 (en) * 2005-03-16 2013-05-21 Qualcomm Incorporated Channel structures for a quasi-orthogonal multiple-access communication system
US9520972B2 (en) 2005-03-17 2016-12-13 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9461859B2 (en) * 2005-03-17 2016-10-04 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9143305B2 (en) * 2005-03-17 2015-09-22 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9184870B2 (en) * 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
US9036538B2 (en) * 2005-04-19 2015-05-19 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US9408220B2 (en) 2005-04-19 2016-08-02 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US8879511B2 (en) 2005-10-27 2014-11-04 Qualcomm Incorporated Assignment acknowledgement for a wireless communication system
US8565194B2 (en) * 2005-10-27 2013-10-22 Qualcomm Incorporated Puncturing signaling channel for a wireless communication system
US8611284B2 (en) * 2005-05-31 2013-12-17 Qualcomm Incorporated Use of supplemental assignments to decrement resources
US8462859B2 (en) * 2005-06-01 2013-06-11 Qualcomm Incorporated Sphere decoding apparatus
US8599945B2 (en) 2005-06-16 2013-12-03 Qualcomm Incorporated Robust rank prediction for a MIMO system
US9179319B2 (en) 2005-06-16 2015-11-03 Qualcomm Incorporated Adaptive sectorization in cellular systems
US8885628B2 (en) * 2005-08-08 2014-11-11 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
US20070041457A1 (en) 2005-08-22 2007-02-22 Tamer Kadous Method and apparatus for providing antenna diversity in a wireless communication system
US9209956B2 (en) 2005-08-22 2015-12-08 Qualcomm Incorporated Segment sensitive scheduling
US8073068B2 (en) * 2005-08-22 2011-12-06 Qualcomm Incorporated Selective virtual antenna transmission
US8644292B2 (en) * 2005-08-24 2014-02-04 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US9136974B2 (en) * 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
US8139672B2 (en) * 2005-09-23 2012-03-20 Qualcomm Incorporated Method and apparatus for pilot communication in a multi-antenna wireless communication system
KR101304785B1 (ko) * 2005-09-29 2013-09-05 인터디지탈 테크날러지 코포레이션 Ｍｉｍｏ 빔형성 기반의 단일 반송파 주파수 분할 다중접속 시스템
US8582509B2 (en) * 2005-10-27 2013-11-12 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US9210651B2 (en) 2005-10-27 2015-12-08 Qualcomm Incorporated Method and apparatus for bootstraping information in a communication system
US8693405B2 (en) 2005-10-27 2014-04-08 Qualcomm Incorporated SDMA resource management
US9225416B2 (en) * 2005-10-27 2015-12-29 Qualcomm Incorporated Varied signaling channels for a reverse link in a wireless communication system
US9225488B2 (en) * 2005-10-27 2015-12-29 Qualcomm Incorporated Shared signaling channel
US9144060B2 (en) * 2005-10-27 2015-09-22 Qualcomm Incorporated Resource allocation for shared signaling channels
US9088384B2 (en) 2005-10-27 2015-07-21 Qualcomm Incorporated Pilot symbol transmission in wireless communication systems
US8477684B2 (en) 2005-10-27 2013-07-02 Qualcomm Incorporated Acknowledgement of control messages in a wireless communication system
US9172453B2 (en) 2005-10-27 2015-10-27 Qualcomm Incorporated Method and apparatus for pre-coding frequency division duplexing system
US8045512B2 (en) 2005-10-27 2011-10-25 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US8582548B2 (en) 2005-11-18 2013-11-12 Qualcomm Incorporated Frequency division multiple access schemes for wireless communication
US8831607B2 (en) 2006-01-05 2014-09-09 Qualcomm Incorporated Reverse link other sector communication
US7940640B2 (en) 2006-01-20 2011-05-10 Nortel Networks Limited Adaptive orthogonal scheduling for virtual MIMO system
KR101221706B1 (ko) 2006-01-25 2013-01-11 삼성전자주식회사 고속 패킷 데이터 시스템의 순방향 링크에서 다중 입력 다중 출력 기술을 지원하는 송수신 장치 및 방법
US7729433B2 (en) * 2006-03-07 2010-06-01 Motorola, Inc. Method and apparatus for hybrid CDM OFDMA wireless transmission
KR101241895B1 (ko) * 2006-04-10 2013-03-11 엘지전자 주식회사 다수의 반송파를 이용한 반복 전송 방법
JP2007295219A (ja) * 2006-04-25 2007-11-08 Fujitsu Ltd マルチキャリア変調方式による通信装置
US7787554B1 (en) * 2006-05-02 2010-08-31 Marvell International Ltd. Beamforming to a subset of receive antennas in a wireless MIMO communication system
TWI343200B (en) * 2006-05-26 2011-06-01 Lg Electronics Inc Method and apparatus for signal generation using phase-shift based pre-coding
KR20070113967A (ko) * 2006-05-26 2007-11-29 엘지전자 주식회사 위상천이 기반의 프리코딩 방법 및 이를 지원하는 송수신기
JPWO2007142233A1 (ja) * 2006-06-05 2009-10-29 パナソニック株式会社 マルチキャリア通信における無線通信装置および無線通信方法
FI20065438A0 (fi) * 2006-06-22 2006-06-22 Nokia Corp Häiriönpoistoyksikkö ja häiriönpoistomenetelmä
KR20080022033A (ko) * 2006-09-05 2008-03-10 엘지전자 주식회사 프리코딩 정보 피드백 방법 및 프리코딩 방법
US7751495B1 (en) * 2006-09-06 2010-07-06 Marvell International Ltd. Equal power output spatial spreading matrix for use in a wireless MIMO communication system
CN101512931B (zh) * 2006-09-06 2014-03-12 高通股份有限公司 编组天线的码字置换和精简反馈
KR100951383B1 (ko) * 2006-09-15 2010-04-08 삼성전자주식회사 다중 안테나 시스템에서 시공간 부호화 장치 및 방법
CN101542938B (zh) * 2006-09-18 2012-12-12 马维尔国际贸易有限公司 用于无线mimo通信系统中的隐式波束形成的校准校正
KR20080026010A (ko) * 2006-09-19 2008-03-24 엘지전자 주식회사 위상천이 기반의 프리코딩을 이용한 데이터 전송 방법 및이를 구현하는 송수신 장치
KR20080026019A (ko) * 2006-09-19 2008-03-24 엘지전자 주식회사 위상천이 기반의 프리코딩 방법 및 이를 지원하는 송수신기
TWI337462B (en) * 2006-09-26 2011-02-11 Realtek Semiconductor Corp Receiver of mimo multi-carrier system and associated apparatus and method for receive antenna selection
US8503560B2 (en) * 2006-10-02 2013-08-06 Samsung Electronics Co., Ltd System and method for performing precoding in a wireless communication system
CA2819715A1 (en) 2006-11-06 2008-05-15 Qualcomm Incorporated Mimo transmission with layer permutation in a wireless communication system
US8374271B2 (en) * 2007-01-08 2013-02-12 Cisco Technology, Inc. Method and system for resizing a MIMO channel
US8780771B2 (en) * 2007-02-06 2014-07-15 Qualcomm Incorporated Cyclic delay diversity and precoding for wireless communication
US20080195917A1 (en) * 2007-02-09 2008-08-14 Interdigital Technology Corporation Method and apparatus for low complexity soft output decoding for quasi-static mimo channels
ATE539499T1 (de) * 2007-02-14 2012-01-15 Lg Electronics Inc Datensende- und empfangsverfahren mit auf phasenverschiebung basierender vorcodierung und dieses unterstützender sender/empfänger
KR20080076683A (ko) * 2007-02-14 2008-08-20 엘지전자 주식회사 위상천이 기반의 프리코딩 방법 및 이를 지원하는 송수신기
KR100974194B1 (ko) * 2007-03-05 2010-08-05 삼성전자주식회사 다중 입출력 무선통신 시스템에서 역호환성을 갖는 공간다중화 장치 및 방법
CN101262265B (zh) * 2007-03-09 2011-09-21 中兴通讯股份有限公司 一种时分双工无线通信系统的延时分集发射与接收的方法
WO2008126516A1 (ja) * 2007-04-10 2008-10-23 Naoki Suehiro 送信方法、送信装置、受信方法及び受信装置
US8131218B2 (en) * 2007-04-13 2012-03-06 General Dynamics C4 Systems, Inc. Methods and apparatus for wirelessly communicating signals that include embedded synchronization/pilot sequences
US8325852B2 (en) * 2007-06-08 2012-12-04 Samsung Electronics Co., Ltd. CDD precoding for open loop SU MIMO
US8160177B2 (en) 2007-06-25 2012-04-17 Samsung Electronics Co., Ltd. Transmit methods with delay diversity and space-frequency diversity
EP2187552A4 (en) * 2007-08-28 2012-10-03 Sharp Kk COMMUNICATION APPARATUS
KR20090030200A (ko) * 2007-09-19 2009-03-24 엘지전자 주식회사 위상천이 기반의 프리코딩을 이용한 데이터 송수신 방법 및이를 지원하는 송수신기
KR20090042140A (ko) 2007-10-25 2009-04-29 한국전자통신연구원 다중 안테나 통신 방법 및 시스템
KR101455992B1 (ko) * 2007-11-14 2014-11-03 엘지전자 주식회사 다중 안테나 시스템에서 신호 전송 방법
JP5006172B2 (ja) * 2007-12-04 2012-08-22 パナソニック株式会社 無線通信方法及び無線通信システム
US20090180459A1 (en) * 2008-01-16 2009-07-16 Orlik Philip V OFDMA Frame Structures for Uplinks in MIMO Networks
EP2234286B1 (en) * 2008-01-17 2016-07-20 Alcatel Lucent Method and apparatus for performing cyclic delay mapping to signals in multiple antenna transmitters
WO2009098532A1 (en) * 2008-02-07 2009-08-13 Nokia Corporation Apparatus, methods, and computer program products providing improved spatial multiplexing for mimo communication
KR101543194B1 (ko) * 2008-02-28 2015-08-07 애플 인크. 무선 통신 시그널링에 적용되는 코딩을 식별하는 정보를 포함하는 피드백 데이터 구조체의 통신
US8379752B2 (en) * 2008-03-19 2013-02-19 General Dynamics C4 Systems, Inc. Methods and apparatus for multiple-antenna communication of wireless signals with embedded synchronization/pilot sequences
CN101350801B (zh) * 2008-03-20 2012-10-10 中兴通讯股份有限公司 长循环前缀帧结构下行专用导频与物理资源块的映射方法
US8331420B2 (en) * 2008-04-14 2012-12-11 General Dynamics C4 Systems, Inc. Methods and apparatus for multiple-antenna communication of wireless signals with embedded pilot signals
US8687480B2 (en) * 2008-06-12 2014-04-01 Apple Inc. Systems and methods for SC-FDMA transmission diversity
CN102077101B (zh) * 2008-06-24 2014-03-12 苹果公司 用于支持蜂窝网络中多用户天线波束形成的系统和方法
EP2294769B1 (en) 2008-07-01 2012-10-24 Telefonaktiebolaget L M Ericsson (PUBL) Methods and apparatus using precoding matrices in a mimo telecommunications system
KR20110031165A (ko) * 2008-07-04 2011-03-24 각고호우징 게이오기주크 멀티캐리어 통신 시스템
KR20100019947A (ko) 2008-08-11 2010-02-19 엘지전자 주식회사 무선 통신 시스템에서 정보 전송 방법
KR101603338B1 (ko) * 2008-08-11 2016-03-15 엘지전자 주식회사 무선 통신 시스템에서 정보 전송 방법 및 장치
EP2327193B1 (en) 2008-08-14 2017-05-31 Samsung Electronics Co., Ltd. Method and apparatus for supporting multiple reference signals in ofdma communication systems
USRE47326E1 (en) 2008-08-14 2019-03-26 Samsung Electronics Co., Ltd Method and apparatus for supporting multiple reference signals in OFDMA communication systems
US8355666B2 (en) * 2008-09-10 2013-01-15 Qualcomm Incorporated Apparatus and method for interference-adaptive communications
US9608780B2 (en) * 2008-09-23 2017-03-28 Qualcomm Incorporated Transmit diversity for SC-FDMA
US8811371B2 (en) * 2008-09-23 2014-08-19 Qualcomm Incorporated Transmit diversity scheme for uplink data transmissions
KR101497928B1 (ko) * 2008-09-25 2015-03-03 삼성전자주식회사 다중입력 다중출력 시스템에서 신호 송수신 장치 및 그 방법
CN101729119B (zh) * 2008-10-15 2014-06-11 中兴通讯股份有限公司 一种下行多输入多输出模式自适应切换的方法和系统
US8948704B2 (en) * 2008-10-22 2015-02-03 Qualcomm Incorporated Scope of channel quality reporting region in a multi-carrier system
WO2010056068A2 (ko) 2008-11-14 2010-05-20 엘지전자주식회사 무선 통신 시스템에서 신호 전송 방법 및 장치
EP2357735B1 (en) 2008-11-14 2016-11-09 LG Electronics Inc. Method and apparatus for information transmission in wireless communication system
US8160188B2 (en) * 2008-12-18 2012-04-17 Broadcom Corporation Method and system for communication in a wireless orthogonal frequency division multiplexing (OFDM) communication system
KR101547284B1 (ko) * 2008-12-31 2015-08-25 인텔렉추얼디스커버리 주식회사 공간―주파수 송신 다이버시티를 이용한 송신 장치 및 방법
EP2209220A1 (en) * 2009-01-19 2010-07-21 ST-Ericsson (France) SAS Process for beamforming data to be transmitted by a base station in a MU-MIMO system and apparatus for performing the same
KR101755038B1 (ko) * 2009-01-30 2017-07-06 엘지전자 주식회사 무선 통신 시스템에서 참조신호 전송 장치 및 방법
US8503572B2 (en) 2009-02-02 2013-08-06 Qualcomm Incorporated Antenna virtualization in a wireless communication environment
KR20100091876A (ko) 2009-02-11 2010-08-19 엘지전자 주식회사 다중안테나 전송을 위한 단말 동작
US8838051B1 (en) 2009-02-19 2014-09-16 Qualcomm Incorporated Transmitter beamforming power control
CN101834702B (zh) * 2009-03-12 2013-12-18 夏普株式会社 信道重构方法、基站和用户设备
US20100232384A1 (en) * 2009-03-13 2010-09-16 Qualcomm Incorporated Channel estimation based upon user specific and common reference signals
JP5410812B2 (ja) * 2009-03-31 2014-02-05 三星電子株式会社 無線通信装置、無線通信システム、及び直接波の受信タイミング検出方法
US20100329370A1 (en) * 2009-04-28 2010-12-30 Beceem Communications Inc. Selection of a Subset of Antennas for Transmission
US8908615B2 (en) * 2009-07-01 2014-12-09 Institute For Information Industry Base station, relay station, computing apparatus, and reference signal transmission, allocation, and receiving methods thereof
GB2472013B (en) * 2009-07-20 2015-04-29 Nvidia Technology Uk Ltd Adaptive transmission
HUE035293T2 (en) * 2009-08-14 2018-05-02 Ericsson Telefon Ab L M Antenna equipment
CN101997650B (zh) * 2009-08-28 2014-07-30 华为技术有限公司 多天线系统数据信号的发射方法、装置和系统
US8355466B2 (en) * 2009-09-25 2013-01-15 General Dynamics C4 Systems, Inc. Cancelling non-linear power amplifier induced distortion from a received signal by moving incorrectly estimated constellation points
US8744009B2 (en) * 2009-09-25 2014-06-03 General Dynamics C4 Systems, Inc. Reducing transmitter-to-receiver non-linear distortion at a transmitter prior to estimating and cancelling known non-linear distortion at a receiver
CN102035579B (zh) * 2009-09-28 2014-09-03 夏普株式会社 信息反馈方法和用户设备
WO2011073252A1 (en) * 2009-12-18 2011-06-23 Nokia Siemens Networks Oy Reference signal resource randomization with su-mimo
CN101778072B (zh) * 2010-01-25 2012-10-17 华为技术有限公司 多载波多天线的信号发送方法及发射机
US9806789B2 (en) * 2010-04-06 2017-10-31 Samsung Electronics Co., Ltd. Apparatus and method for spatial division duplex (SDD) for millimeter wave communication system
EP2385664A1 (en) * 2010-05-03 2011-11-09 Mitsubishi Electric R&D Centre Europe B.V. Method for transferring data and information enabling an estimate of a wireless link between a source and at least one receiver.
CN101854712A (zh) 2010-06-18 2010-10-06 华为技术有限公司 天线间功率平衡方法及装置、基站
CN102299731B (zh) * 2010-06-28 2016-06-29 中兴通讯股份有限公司 Ofdm系统的发射装置及提高循环延迟分集性能的方法
US8625689B2 (en) * 2010-07-09 2014-01-07 Texas Instruments Incorporated Time-domain link adaptation
US9007263B2 (en) 2010-09-09 2015-04-14 Qualcomm Incorporated Phase rotation techniques in a multi-user wireless communication environment
ES2663612T3 (es) * 2010-10-04 2018-04-16 Vodafone España, S.A.U. Método y sistema para transmisión mejorada en redes de comunicación móvil
US8737506B1 (en) * 2010-12-29 2014-05-27 Sprint Communications Company L.P. Determination of transmit diversity transmission delays
CN102394676B (zh) * 2011-06-30 2017-11-28 中兴通讯股份有限公司 预校正信息的反馈方法及终端
US9154969B1 (en) 2011-09-29 2015-10-06 Marvell International Ltd. Wireless device calibration for implicit transmit
US8750913B2 (en) * 2011-12-13 2014-06-10 Telefonaktiebolaget L M Ericsson (Publ) Asymmetric resource sharing using stale feedback
EP2892163B1 (en) 2012-08-31 2018-05-02 LG Electronics Inc. Method and apparatus for virtualizing antenna in wireless communication system
US9661579B1 (en) 2013-05-03 2017-05-23 Marvell International Ltd. Per-tone power control in OFDM
US9843097B1 (en) 2013-07-08 2017-12-12 Marvell International Ltd. MIMO implicit beamforming techniques
CN103607364B (zh) * 2013-12-04 2017-01-25 北京邮电大学 循环延迟分集系统中基于信道估计的物理层加密方法
CN104753573B (zh) * 2013-12-31 2018-05-01 中兴通讯股份有限公司 一种实现空分复用的方法、系统、基站及终端
US10033505B2 (en) * 2014-07-31 2018-07-24 Qualcomm Incorporated Transmission of uplink control channels over an unlicensed radio frequency spectrum band
US9867187B2 (en) * 2014-08-04 2018-01-09 Qualcomm Incorporated Techniques for configuring uplink channel transmissions using shared radio frequency spectrum band
EP3035547B1 (en) 2014-12-16 2019-11-20 Nokia Technologies Oy An apparatus and method for multiple antenna systems
CN105991172A (zh) * 2015-02-16 2016-10-05 富士通株式会社 天线阵列的虚拟化模型选择方法、装置以及通信系统
CN105071842B (zh) * 2015-07-07 2018-05-15 江苏中兴微通信息科技有限公司 Sc-mimo系统中一流三天线或三流四天线空间分集收发方法及装置
FR3052615B1 (fr) * 2016-06-09 2019-11-01 B-Com Procede de demodulation d'un signal recu, produit programme d'ordinateur et dispositif correspondants
CN106788632B (zh) * 2016-12-13 2020-02-18 广西师范大学 分布式mimo系统的端口和天线选择方法
KR101980959B1 (ko) * 2017-03-02 2019-05-21 포항공과대학교 산학협력단 다중 입력 다중 출력을 지원하는 무선 통신 시스템에서 공간 격자 변조 방법 및 이를 이용하는 장치
CN108923896B (zh) 2017-04-19 2021-03-26 上海朗帛通信技术有限公司 一种被用于寻呼的用户设备、基站中的方法和装置
US10707922B2 (en) 2017-07-06 2020-07-07 Microsoft Technology Licensing, Llc Spatial hopping using antenna sets across multiple base stations
CN109842580B (zh) * 2017-11-28 2021-02-12 华为技术有限公司 一种信道估计方法以及相关设备
TW202002401A (zh) * 2018-06-06 2020-01-01 財團法人工業技術研究院 多輸入多輸出天線系統及其控制方法
US10432272B1 (en) 2018-11-05 2019-10-01 XCOM Labs, Inc. Variable multiple-input multiple-output downlink user equipment
US10812216B2 (en) 2018-11-05 2020-10-20 XCOM Labs, Inc. Cooperative multiple-input multiple-output downlink scheduling
US10659112B1 (en) 2018-11-05 2020-05-19 XCOM Labs, Inc. User equipment assisted multiple-input multiple-output downlink configuration
US10756860B2 (en) 2018-11-05 2020-08-25 XCOM Labs, Inc. Distributed multiple-input multiple-output downlink configuration
US11290172B2 (en) 2018-11-27 2022-03-29 XCOM Labs, Inc. Non-coherent cooperative multiple-input multiple-output communications
US11063645B2 (en) 2018-12-18 2021-07-13 XCOM Labs, Inc. Methods of wirelessly communicating with a group of devices
US10756795B2 (en) 2018-12-18 2020-08-25 XCOM Labs, Inc. User equipment with cellular link and peer-to-peer link
US11330649B2 (en) 2019-01-25 2022-05-10 XCOM Labs, Inc. Methods and systems of multi-link peer-to-peer communications
US10756767B1 (en) 2019-02-05 2020-08-25 XCOM Labs, Inc. User equipment for wirelessly communicating cellular signal with another user equipment
US11032841B2 (en) 2019-04-26 2021-06-08 XCOM Labs, Inc. Downlink active set management for multiple-input multiple-output communications
US10756782B1 (en) 2019-04-26 2020-08-25 XCOM Labs, Inc. Uplink active set management for multiple-input multiple-output communications
US10686502B1 (en) 2019-04-29 2020-06-16 XCOM Labs, Inc. Downlink user equipment selection
US10735057B1 (en) 2019-04-29 2020-08-04 XCOM Labs, Inc. Uplink user equipment selection
US11411778B2 (en) 2019-07-12 2022-08-09 XCOM Labs, Inc. Time-division duplex multiple input multiple output calibration
CN110881200B (zh) * 2019-10-30 2021-06-22 中国科学院上海微系统与信息技术研究所 一种基于非正交多址的信号传输方法、系统及电子设备
US11411779B2 (en) 2020-03-31 2022-08-09 XCOM Labs, Inc. Reference signal channel estimation
CA3175361A1 (en) 2020-04-15 2021-10-21 Tamer Adel Kadous Wireless network multipoint association and diversity
CA3178604A1 (en) 2020-05-26 2021-12-02 XCOM Labs, Inc. Interference-aware beamforming
KR20230091910A (ko) 2020-10-19 2023-06-23 엑스콤 랩스 인코퍼레이티드 무선 통신 시스템에서의 참조 신호
WO2022093988A1 (en) 2020-10-30 2022-05-05 XCOM Labs, Inc. Clustering and/or rate selection in multiple-input multiple-output communication systems
CN114301509B (zh) * 2021-12-24 2022-10-18 西南交通大学 基于虚拟相位共轭信号自适应聚焦的分集天线定位方法
US11616671B1 (en) * 2022-01-10 2023-03-28 Qualcomm Incorporated Subcarrier mapping techniques for guard interval-based orthogonal frequency division multiplexing communications

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1337838A (zh) * 2000-07-21 2002-02-27 三星电子株式会社 发射天线分集方法和使用该方法的基站装置和移动站装置
CN1507167A (zh) * 2002-12-11 2004-06-23 华为技术有限公司 一种空时发射分集方法
EP1538772A1 (en) * 2003-12-05 2005-06-08 Samsung Electronics Co., Ltd. Apparatus and method for transmitting data using eigenvector selection in MIMO mobile communication systems

Family Cites Families (947)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4393276A (en) 1981-03-19 1983-07-12 Bell Telephone Laboratories, Incorporated Fourier masking analog signal secure communication system
FR2527871B1 (fr) 1982-05-27 1986-04-11 Thomson Csf Systeme de radiocommunications, a sauts de frequence
SU1320883A1 (ru) 1985-02-06 1987-06-30 Предприятие П/Я Р-6707 Устройство дл восстановлени временных интервалов цифровых сигналов,принимаемых из канала с ограниченной полосой пропускани
FR2584884B1 (fr) 1985-07-09 1987-10-09 Trt Telecom Radio Electr Procede et dispositif de recherche de canal libre pour un systeme de radio mobile
JPS6216639A (ja) 1985-07-16 1987-01-24 Kokusai Denshin Denwa Co Ltd <Kdd> 秘話音声信号送出装置
GB2180127B (en) 1985-09-04 1989-08-23 Philips Electronic Associated Method of data communication
JPS6290045A (ja) 1985-10-16 1987-04-24 Kokusai Denshin Denwa Co Ltd <Kdd> Ｆｄｍａ通信方式における周波数割当方式
JPH028725A (ja) 1988-06-27 1990-01-12 Toshiba Corp 漏洩検出装置
JPH0331342A (ja) 1989-06-28 1991-02-12 Mitsubishi Petrochem Co Ltd ポリオレフィン樹脂組成物
US5008900A (en) 1989-08-14 1991-04-16 International Mobile Machines Corporation Subscriber unit for wireless digital subscriber communication system
JPH0382148A (ja) 1989-08-25 1991-04-08 Hitachi Ltd 半導体装置
FR2652452B1 (fr) 1989-09-26 1992-03-20 Europ Agence Spatiale Dispositif d'alimentation d'une antenne a faisceaux multiples.
JPH0484200A (ja) 1990-07-27 1992-03-17 Nec Corp マルチパルス音声符号化方法
JPH04111544A (ja) 1990-08-31 1992-04-13 Nippon Telegr & Teleph Corp <Ntt> 無線チャネル割当方法
JP2807771B2 (ja) 1991-03-28 1998-10-08 キヤノン株式会社 無線電話システム及び無線通信装置
US5257399A (en) 1990-11-28 1993-10-26 Telefonaktiebolaget L M Ericsson Multiple access handling in a cellular communications system
US5253270A (en) 1991-07-08 1993-10-12 Hal Communications Apparatus useful in radio communication of digital data using minimal bandwidth
US5592490A (en) 1991-12-12 1997-01-07 Arraycomm, Inc. Spectrally efficient high capacity wireless communication systems
US5455839A (en) 1991-12-27 1995-10-03 Motorola, Inc. Device and method for precoding
JP2904986B2 (ja) 1992-01-31 1999-06-14 日本放送協会 直交周波数分割多重ディジタル信号送信装置および受信装置
US5384810A (en) 1992-02-05 1995-01-24 At&T Bell Laboratories Modulo decoder
US5363408A (en) 1992-03-24 1994-11-08 General Instrument Corporation Mode selective quadrature amplitude modulation communication system
US5282222A (en) 1992-03-31 1994-01-25 Michel Fattouche Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum
GB9209027D0 (en) 1992-04-25 1992-06-17 British Aerospace Multi purpose digital signal regenerative processing apparatus
US5268694A (en) 1992-07-06 1993-12-07 Motorola, Inc. Communication system employing spectrum reuse on a spherical surface
FR2693861A1 (fr) 1992-07-16 1994-01-21 Philips Electronique Lab Récepteur de signaux à répartition multiplexée de fréquences orthogonales muni d'un dispositif de synchronisation de fréquences.
US5604744A (en) * 1992-10-05 1997-02-18 Telefonaktiebolaget Lm Ericsson Digital control channels having logical channels for multiple access radiocommunication
US5603081A (en) 1993-11-01 1997-02-11 Telefonaktiebolaget Lm Ericsson Method for communicating in a wireless communication system
US5768276A (en) 1992-10-05 1998-06-16 Telefonaktiebolaget Lm Ericsson Digital control channels having logical channels supporting broadcast SMS
US5404355A (en) 1992-10-05 1995-04-04 Ericsson Ge Mobile Communications, Inc. Method for transmitting broadcast information in a digital control channel
JP2942913B2 (ja) 1993-06-10 1999-08-30 ケイディディ株式会社 相手認証／暗号鍵配送方式
CA2165342C (en) 1993-06-18 2005-11-15 Brian K. Butler Method and apparatus for determining the data rate of a received signal
US5870393A (en) * 1995-01-20 1999-02-09 Hitachi, Ltd. Spread spectrum communication system and transmission power control method therefor
JPH0746248A (ja) 1993-07-30 1995-02-14 Toshiba Corp 無線通信システム
US6501810B1 (en) 1998-10-13 2002-12-31 Agere Systems Inc. Fast frame synchronization
GB9320556D0 (en) 1993-10-06 1993-11-24 Unilever Plc Hair conditioning composition
US5594738A (en) * 1993-10-18 1997-01-14 Motorola, Inc. Time slot allocation method
ZA948134B (en) 1993-10-28 1995-06-13 Quaqlcomm Inc Method and apparatus for performing handoff between sectors of a common base station
US5410538A (en) 1993-11-09 1995-04-25 At&T Corp. Method and apparatus for transmitting signals in a multi-tone code division multiple access communication system
SG48266A1 (en) 1993-12-22 1998-04-17 Philips Electronics Nv Multicarrier frequency hopping communications system
US5465253A (en) 1994-01-04 1995-11-07 Motorola, Inc. Method and apparatus for demand-assigned reduced-rate out-of-band signaling channel
US5469471A (en) 1994-02-01 1995-11-21 Qualcomm Incorporated Method and apparatus for providing a communication link quality indication
GB9402942D0 (en) * 1994-02-16 1994-04-06 Northern Telecom Ltd Base station antenna arrangement
US5513379A (en) 1994-05-04 1996-04-30 At&T Corp. Apparatus and method for dynamic resource allocation in wireless communication networks utilizing ordered borrowing
JPH07336323A (ja) 1994-06-10 1995-12-22 Oki Electric Ind Co Ltd 符号分割多元接続装置
US5603096A (en) 1994-07-11 1997-02-11 Qualcomm Incorporated Reverse link, closed loop power control in a code division multiple access system
US5490139A (en) 1994-09-28 1996-02-06 International Business Machines Corporation Mobility enabling access point architecture for wireless attachment to source routing networks
US5583869A (en) 1994-09-30 1996-12-10 Motorola, Inc. Method for dynamically allocating wireless communication resources
KR100211426B1 (ko) 1994-10-27 1999-08-02 포만 제프리 엘 이동 사용자의 안전한 식별 방법 및 시스템
JP3437291B2 (ja) 1994-11-14 2003-08-18 キヤノン株式会社 再生装置および再生方法
US6169910B1 (en) * 1994-12-30 2001-01-02 Focused Energy Holding Inc. Focused narrow beam communication system
US5684491A (en) 1995-01-27 1997-11-04 Hazeltine Corporation High gain antenna systems for cellular use
JPH08288927A (ja) 1995-04-17 1996-11-01 Oki Electric Ind Co Ltd スペクトル拡散通信方式及びスペクトル拡散通信装置
EP0740431B1 (en) 1995-04-28 2005-09-14 Alcatel Method for TDMA management, central station, terminal station and network system to perform this method
US5612978A (en) 1995-05-30 1997-03-18 Motorola, Inc. Method and apparatus for real-time adaptive interference cancellation in dynamic environments
US6535666B1 (en) * 1995-06-02 2003-03-18 Trw Inc. Method and apparatus for separating signals transmitted over a waveguide
US6215983B1 (en) 1995-06-02 2001-04-10 Trw Inc. Method and apparatus for complex phase equalization for use in a communication system
US6018317A (en) 1995-06-02 2000-01-25 Trw Inc. Cochannel signal processing system
JP3073666B2 (ja) 1995-06-21 2000-08-07 モトローラ株式会社 プリアンブルを付加情報伝送のために活用したプリアンブル同期通信システム
US5726978A (en) * 1995-06-22 1998-03-10 Telefonaktiebolaget L M Ericsson Publ. Adaptive channel allocation in a frequency division multiplexed system
FI99252C (fi) 1995-07-03 1997-12-29 Nokia Mobile Phones Ltd Yhdistetty radiosignaalin modulointi- ja monikäyttömenetelmä
US6154484A (en) 1995-09-06 2000-11-28 Solana Technology Development Corporation Method and apparatus for embedding auxiliary data in a primary data signal using frequency and time domain processing
US5815488A (en) 1995-09-28 1998-09-29 Cable Television Laboratories, Inc. Multiple user access method using OFDM
JP3639364B2 (ja) 1995-11-08 2005-04-20 オリンパス株式会社 超音波診断装置
DE69633705T2 (de) 1995-11-16 2006-02-02 Ntt Mobile Communications Network Inc. Verfahren zum Erfassen eines digitalen Signals und Detektor
JPH09139725A (ja) 1995-11-16 1997-05-27 Matsushita Electric Ind Co Ltd 多重通信装置
US5887023A (en) 1995-11-29 1999-03-23 Nec Corporation Method and apparatus for a frequency hopping-spread spectrum communication system
US5815116A (en) 1995-11-29 1998-09-29 Trw Inc. Personal beam cellular communication system
JP2812318B2 (ja) 1995-11-29 1998-10-22 日本電気株式会社 スペクトラム拡散通信方法及び装置
KR0150275B1 (ko) 1995-12-22 1998-11-02 양승택 멀티캐스트 통신의 폭주 제어방법
EP0786889B1 (en) 1996-02-02 2002-04-17 Deutsche Thomson-Brandt Gmbh Method for the reception of multicarrier signals and related apparatus
US6088592A (en) 1996-03-25 2000-07-11 Airnet Communications Corporation Wireless system plan using in band-translators with diversity backhaul to enable efficient depolyment of high capacity base transceiver systems
US6134215A (en) 1996-04-02 2000-10-17 Qualcomm Incorpoated Using orthogonal waveforms to enable multiple transmitters to share a single CDM channel
US5822368A (en) 1996-04-04 1998-10-13 Lucent Technologies Inc. Developing a channel impulse response by using distortion
JPH09284200A (ja) 1996-04-10 1997-10-31 Mitsubishi Electric Corp 無線通信装置及び無線通信方法
JPH09281508A (ja) * 1996-04-12 1997-10-31 Semiconductor Energy Lab Co Ltd 液晶表示装置およびその作製方法
GB9609148D0 (en) 1996-05-01 1996-07-03 Plessey Telecomm Multi-party communication
US5790537A (en) 1996-05-15 1998-08-04 Mcgill University Interference suppression in DS-CDMA systems
DE69705356T2 (de) 1996-05-17 2002-05-02 Motorola Ltd., Basingstoke Verfahren und Vorrichtung zur Gewichtung eines Uebertragungsweges
US5926470A (en) 1996-05-22 1999-07-20 Qualcomm Incorporated Method and apparatus for providing diversity in hard handoff for a CDMA system
GB9611146D0 (en) 1996-05-29 1996-07-31 Philips Electronics Nv Method of, and system for, transmitting messages
US5732113A (en) 1996-06-20 1998-03-24 Stanford University Timing and frequency synchronization of OFDM signals
KR980007105A (ko) 1996-06-28 1998-03-30 김광호 이동국 송신전력 제어방법
US6058309A (en) 1996-08-09 2000-05-02 Nortel Networks Corporation Network directed system selection for cellular and PCS enhanced roaming
US6141317A (en) 1996-08-22 2000-10-31 Tellabs Operations, Inc. Apparatus and method for bandwidth management in a multi-point OFDM/DMT digital communications system
US6233456B1 (en) 1996-09-27 2001-05-15 Qualcomm Inc. Method and apparatus for adjacent coverage area handoff in communication systems
JP3444114B2 (ja) 1996-11-22 2003-09-08 ソニー株式会社 通信方法、基地局及び端末装置
US5956642A (en) 1996-11-25 1999-09-21 Telefonaktiebolaget L M Ericsson Adaptive channel allocation method and apparatus for multi-slot, multi-carrier communication system
US6061337A (en) 1996-12-02 2000-05-09 Lucent Technologies Inc. System and method for CDMA handoff using telemetry to determine the need for handoff and to select the destination cell site
KR19980063990A (ko) 1996-12-11 1998-10-07 윌리엄비.켐플러 로컬 다지점 분배 서비스 시스템 내에서 전송 자원을 할당 및할당해제하는 방법
KR100221336B1 (ko) 1996-12-28 1999-09-15 전주범 직교 주파수 분할 다중화 수신 시스템의 프레임 동기 장치 및 그 방법
US5953325A (en) 1997-01-02 1999-09-14 Telefonaktiebolaget L M Ericsson (Publ) Forward link transmission mode for CDMA cellular communications system using steerable and distributed antennas
US6232918B1 (en) 1997-01-08 2001-05-15 Us Wireless Corporation Antenna array calibration in wireless communication systems
US6173007B1 (en) 1997-01-15 2001-01-09 Qualcomm Inc. High-data-rate supplemental channel for CDMA telecommunications system
US5933421A (en) 1997-02-06 1999-08-03 At&T Wireless Services Inc. Method for frequency division duplex communications
US5920571A (en) 1997-02-07 1999-07-06 Lucent Technologies Inc. Frequency channel and time slot assignments in broadband access networks
US6335922B1 (en) 1997-02-11 2002-01-01 Qualcomm Incorporated Method and apparatus for forward link rate scheduling
EP0925693A4 (en) 1997-02-21 2002-01-02 Motorola Inc METHOD AND DEVICE FOR ASSIGNING FREQUENCY RESOURCES OF A WIRELESS COMMUNICATION SYSTEM
US6359923B1 (en) 1997-12-18 2002-03-19 At&T Wireless Services, Inc. Highly bandwidth efficient communications
US6584144B2 (en) * 1997-02-24 2003-06-24 At&T Wireless Services, Inc. Vertical adaptive antenna array for a discrete multitone spread spectrum communications system
US5838268A (en) 1997-03-14 1998-11-17 Orckit Communications Ltd. Apparatus and methods for modulation and demodulation of data
US5974310A (en) 1997-03-20 1999-10-26 Omnipoint Corporation Communication control for a user of a central communication center
FI104610B (fi) 1997-03-27 2000-02-29 Nokia Networks Oy Ohjauskanavan allokointi pakettiradioverkossa
US6175550B1 (en) 1997-04-01 2001-01-16 Lucent Technologies, Inc. Orthogonal frequency division multiplexing system with dynamically scalable operating parameters and method thereof
KR100242421B1 (ko) 1997-04-14 2000-02-01 윤종용 디지털 이동 통신시스템의 파이롯트 피엔 오프셋 할당 방법
FI106605B (fi) * 1997-04-16 2001-02-28 Nokia Networks Oy Autentikointimenetelmä
US6076114A (en) 1997-04-18 2000-06-13 International Business Machines Corporation Methods, systems and computer program products for reliable data transmission over communications networks
FI105136B (fi) 1997-04-21 2000-06-15 Nokia Mobile Phones Ltd Yleinen pakettiradiopalvelu
FI104939B (fi) 1997-04-23 2000-04-28 Nokia Networks Oy Merkinannon toteutus tietoliikenneverkossa
EP0978958B1 (en) 1997-04-24 2010-07-21 Ntt Mobile Communications Network Inc. Mobile communication method and mobile communication system
KR100241894B1 (ko) 1997-05-07 2000-02-01 윤종용 개인통신 시스템의 코드분할 접속방식 기지국 시스템에서 소프트웨어 관리방법
US6075814A (en) 1997-05-09 2000-06-13 Broadcom Homenetworking, Inc. Method and apparatus for reducing signal processing requirements for transmitting packet-based data with a modem
JP2879030B2 (ja) 1997-05-16 1999-04-05 株式会社次世代デジタルテレビジョン放送システム研究所 Ｏｆｄｍ送信装置及び受信装置とｏｆｄｍ送信方法及び受信方法
FI105063B (fi) 1997-05-16 2000-05-31 Nokia Networks Oy Menetelmä lähetyssuunnan määrittämiseksi ja radiojärjestelmä
US6374115B1 (en) 1997-05-28 2002-04-16 Transcrypt International/E.F. Johnson Method and apparatus for trunked radio repeater communications with backwards compatibility
US6111865A (en) 1997-05-30 2000-08-29 Qualcomm Incorporated Dual channel slotted paging
DE69838063T2 (de) 1997-05-30 2008-03-13 Qualcomm Inc., San Diego Verfahren und Einrichtung zum indirekten Funkruf eines schnurlosen Endgerätes mit weniger codierten Funkrufandeutung.
US6052364A (en) 1997-06-13 2000-04-18 Comsat Corporation CDMA system architecture for satcom terminals
SE9702271D0 (sv) 1997-06-13 1997-06-13 Ericsson Telefon Ab L M Återanvändning av fysisk kontrollkanal i ett distribuerat cellulärt radiokommunikationssystem
US6151296A (en) 1997-06-19 2000-11-21 Qualcomm Incorporated Bit interleaving for orthogonal frequency division multiplexing in the transmission of digital signals
US5867478A (en) 1997-06-20 1999-02-02 Motorola, Inc. Synchronous coherent orthogonal frequency division multiplexing system, method, software and device
US6240129B1 (en) 1997-07-10 2001-05-29 Alcatel Method and windowing unit to reduce leakage, fourier transformer and DMT modem wherein the unit is used
US5852630A (en) 1997-07-17 1998-12-22 Globespan Semiconductor, Inc. Method and apparatus for a RADSL transceiver warm start activation procedure with precoding
US6038263A (en) 1997-07-31 2000-03-14 Motorola, Inc. Method and apparatus for transmitting signals in a communication system
US6307849B1 (en) 1997-09-08 2001-10-23 Qualcomm Incorporated Method and system for changing forward traffic channel power allocation during soft handoff
KR100365346B1 (ko) 1997-09-09 2003-04-11 삼성전자 주식회사 이동통신시스템의쿼시직교부호생성및쿼시직교부호를이용한대역확산장치및방법
US6038450A (en) * 1997-09-12 2000-03-14 Lucent Technologies, Inc. Soft handover system for a multiple sub-carrier communication system and method thereof
US6377809B1 (en) 1997-09-16 2002-04-23 Qualcomm Incorporated Channel structure for communication systems
US6577739B1 (en) 1997-09-19 2003-06-10 University Of Iowa Research Foundation Apparatus and methods for proportional audio compression and frequency shifting
US6058105A (en) * 1997-09-26 2000-05-02 Lucent Technologies Inc. Multiple antenna communication system and method thereof
US6075797A (en) 1997-10-17 2000-06-13 3Com Corporation Method and system for detecting mobility of a wireless-capable modem to minimize data transfer rate renegotiations
US6000054A (en) 1997-11-03 1999-12-07 Motorola, Inc. Method and apparatus for encoding and decoding binary information using restricted coded modulation and parallel concatenated convolution codes
US7184426B2 (en) 2002-12-12 2007-02-27 Qualcomm, Incorporated Method and apparatus for burst pilot for a time division multiplex system
KR100369602B1 (ko) * 1997-11-03 2003-04-11 삼성전자 주식회사 부호분할다중접속방식이동통신시스템의전력제어비트삽입방법
US5995992A (en) 1997-11-17 1999-11-30 Bull Hn Information Systems Inc. Conditional truncation indicator control for a decimal numeric processor employing result truncation
US6108323A (en) 1997-11-26 2000-08-22 Nokia Mobile Phones Limited Method and system for operating a CDMA cellular system having beamforming antennas
US5971484A (en) * 1997-12-03 1999-10-26 Steelcase Development Inc. Adjustable armrest for chairs
US6067315A (en) 1997-12-04 2000-05-23 Telefonaktiebolaget Lm Ericsson Method and apparatus for coherently-averaged power estimation
US6563806B1 (en) 1997-12-12 2003-05-13 Hitachi, Ltd. Base station for multi-carrier TDMA mobile communication system and method for assigning communication channels
US6222832B1 (en) 1998-06-01 2001-04-24 Tantivy Communications, Inc. Fast Acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
US6393008B1 (en) 1997-12-23 2002-05-21 Nokia Movile Phones Ltd. Control structures for contention-based packet data services in wideband CDMA
JPH11191756A (ja) 1997-12-25 1999-07-13 Nec Corp Ｐｈｓ（登録商標）によるデータ通信装置及び方法
JPH11196109A (ja) 1997-12-26 1999-07-21 Canon Inc 無線情報通信システム
DE19800953C1 (de) 1998-01-13 1999-07-29 Siemens Ag Verfahren und Funk-Kommunikationssystem zur Zuteilung von Funkressourcen einer Funkschnittstelle
US6175650B1 (en) * 1998-01-26 2001-01-16 Xerox Corporation Adaptive quantization compatible with the JPEG baseline sequential mode
US6084919A (en) 1998-01-30 2000-07-04 Motorola, Inc. Communication unit having spectral adaptability
US5955992A (en) 1998-02-12 1999-09-21 Shattil; Steve J. Frequency-shifted feedback cavity used as a phased array antenna controller and carrier interference multiple access spread-spectrum transmitter
DE69908516T2 (de) 1998-02-14 2003-12-11 Samsung Electronics Co., Ltd. Daten kommunikationsgerät und verfahren für mobile kommunikationsanordnung mit zugeteiltem kontrollkanal
JP3589851B2 (ja) 1998-02-20 2004-11-17 株式会社日立製作所 パケット通信システム及びパケット通信装置
WO1999044383A1 (de) 1998-02-27 1999-09-02 Siemens Aktiengesellschaft Telekommunikationssysteme mit drahtloser, auf code- und zeitmultiplex basierender telekommunikation zwischen mobilen und/oder stationären sende-/empfangsgeräten
DE59907450D1 (de) 1998-02-27 2003-11-27 Siemens Ag Telekommunikationssysteme mit drahtloser, auf code- und zeitmultiplex basierender telekommunikation
JP3199020B2 (ja) 1998-02-27 2001-08-13 日本電気株式会社 音声音楽信号の符号化装置および復号装置
US6768728B1 (en) 1998-03-14 2004-07-27 Samsung Electronics Co., Ltd. Device and method for exchanging frame messages of different lengths in CDMA communication system
BRPI9909023B1 (pt) 1998-03-23 2017-03-28 Samsung Electronics Co Ltd dispositivo de controle de potência e método de controle de um canal comum de enlace inverso num sistema de comunicação cdma
EP2285054A1 (en) 1998-04-03 2011-02-16 Tellabs Operations, Inc. Filter for impulse response shortening, with additional spectral constraints, for multicarrier transmission
US6112094A (en) 1998-04-06 2000-08-29 Ericsson Inc. Orthogonal frequency hopping pattern re-use scheme
JPH11298954A (ja) 1998-04-08 1999-10-29 Hitachi Ltd 無線通信方法及び無線通信装置
US6353620B1 (en) 1998-04-09 2002-03-05 Ericsson Inc. System and method for facilitating inter-nodal protocol agreement in a telecommunications
US6816477B1 (en) 1998-04-21 2004-11-09 Thomson Licensing S.A. Transmission method in a domestic communication system comprising a wireless channel
US6567425B1 (en) 1998-04-23 2003-05-20 Telefonaktiebolaget Lm Ericsson (Publ) Bearer independent signaling protocol
US6075350A (en) 1998-04-24 2000-06-13 Lockheed Martin Energy Research Corporation Power line conditioner using cascade multilevel inverters for voltage regulation, reactive power correction, and harmonic filtering
US6198775B1 (en) * 1998-04-28 2001-03-06 Ericsson Inc. Transmit diversity method, systems, and terminals using scramble coding
JP3955680B2 (ja) 1998-05-12 2007-08-08 株式会社エヌ・ティ・ティ・ドコモ 時分割通信方式の移動通信システムにおける無線チャネルアクセス方法、その方法を使用する基地局及び移動局
KR100383575B1 (ko) 1998-05-12 2004-06-26 삼성전자주식회사 단말기의송신전력에서피크전력대평균전력비를줄이기위한확산변조방법및장치
CN1114282C (zh) 1998-05-12 2003-07-09 三星电子株式会社 减小移动台发射功率的蜂值与平均值功率比的装置和方法
GB2337414A (en) 1998-05-14 1999-11-17 Fujitsu Ltd Soft handoff in cellular communications networks
US6643275B1 (en) 1998-05-15 2003-11-04 Telefonaktiebolaget Lm Ericsson (Publ) Random access in a mobile telecommunications system
KR100291476B1 (ko) 1998-05-25 2001-07-12 윤종용 파일럿측정요구명령제어방법및시스템
JP2000004215A (ja) 1998-06-16 2000-01-07 Matsushita Electric Ind Co Ltd 送受信システム
JP3092798B2 (ja) 1998-06-30 2000-09-25 日本電気株式会社 適応送受信装置
JP2000022618A (ja) 1998-07-03 2000-01-21 Hitachi Ltd 基地局およびアンテナビームの制御方法
DE19829709A1 (de) 1998-07-03 2000-01-05 Beiersdorf Ag Zubereitungen zum Schutze der Kleinkinderhaut vor Dermatitis ammoniacalis
RU2141706C1 (ru) 1998-07-06 1999-11-20 Военная академия связи Способ и устройство адаптивной пространственной фильтрации сигналов
KR100318959B1 (ko) 1998-07-07 2002-04-22 윤종용 부호분할다중접속통신시스템의서로다른부호간의간섭을제거하는장치및방법
WO2000003508A1 (fr) 1998-07-13 2000-01-20 Sony Corporation Procede de communication, emetteur, et recepteur
JP3449985B2 (ja) 1998-07-16 2003-09-22 サムスン エレクトロニクス カンパニー リミテッド 移動通信システムのパケットデータ処理システム及び方法
US6636525B1 (en) 1998-08-19 2003-10-21 International Business Machines Corporation Destination dependent coding for discrete multi-tone modulation
KR100429540B1 (ko) 1998-08-26 2004-08-09 삼성전자주식회사 이동통신시스템의패킷데이터통신장치및방법
US6798736B1 (en) 1998-09-22 2004-09-28 Qualcomm Incorporated Method and apparatus for transmitting and receiving variable rate data
JP2000102065A (ja) 1998-09-24 2000-04-07 Toshiba Corp 無線通信基地局装置
CA2282942A1 (en) 1998-11-09 2000-05-09 Lucent Technologies Inc. Efficient authentication with key update
US6542485B1 (en) 1998-11-25 2003-04-01 Lucent Technologies Inc. Methods and apparatus for wireless communication using time division duplex time-slotted CDMA
US6473399B1 (en) 1998-11-30 2002-10-29 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for determining an optimum timeout under varying data rates in an RLC wireless system which uses a PDU counter
US6590881B1 (en) 1998-12-04 2003-07-08 Qualcomm, Incorporated Method and apparatus for providing wireless communication system synchronization
DE69815113T2 (de) 1998-12-04 2004-04-08 Lucent Technologies Inc. Fehlerverschleierung und -korrektur für Sprach-, Bild- und Videosignale
AU750979B2 (en) 1998-12-07 2002-08-01 Samsung Electronics Co., Ltd. Device and method for gating transmission in a CDMA mobile communication system
JP2000184425A (ja) 1998-12-15 2000-06-30 Toshiba Corp 無線通信基地局装置
WO2000036776A1 (fr) 1998-12-17 2000-06-22 Mitsubishi Denki Kabushiki Kaisha Procede de transmission et dispositif de transmission
GB2345612B (en) 1998-12-31 2003-09-03 Nokia Mobile Phones Ltd Measurement report transmission in a telecommunications system
US6654429B1 (en) 1998-12-31 2003-11-25 At&T Corp. Pilot-aided channel estimation for OFDM in wireless systems
US6452916B1 (en) 1999-01-04 2002-09-17 Lucent Technologies Inc. Space-time spreading method of CDMA wireless communication
EP1705852B1 (en) 1999-01-08 2010-02-10 Sony Deutschland Gmbh Synchronisation symbol structure for OFDM system
US6393012B1 (en) 1999-01-13 2002-05-21 Qualcomm Inc. System for allocating resources in a communication system
US6229795B1 (en) 1999-01-13 2001-05-08 Qualcomm Incorporated System for allocating resources in a communication system
EP1021019A1 (en) 1999-01-15 2000-07-19 Sony International (Europe) GmbH Quasi-differential modulation/demodulation method for multi-amplitude digital modulated signals and OFDM system
US6584140B1 (en) 1999-01-22 2003-06-24 Systems Information And Electronic Systems Integration Inc. Spectrum efficient fast frequency-hopped modem with coherent demodulation
US6271946B1 (en) 1999-01-25 2001-08-07 Telcordia Technologies, Inc. Optical layer survivability and security system using optical label switching and high-speed optical header generation and detection
US6388998B1 (en) 1999-02-04 2002-05-14 Lucent Technologies Inc. Reuse of codes and spectrum in a CDMA system with multiple-sector cells
US6256478B1 (en) 1999-02-18 2001-07-03 Eastman Kodak Company Dynamic packet sizing in an RF communications system
US6597746B1 (en) 1999-02-18 2003-07-22 Globespanvirata, Inc. System and method for peak to average power ratio reduction
CA2262315A1 (en) 1999-02-19 2000-08-19 Northern Telecom Limited Joint optimal power balance for coded/tdm constituent data channels
US6259918B1 (en) 1999-02-26 2001-07-10 Telefonaktiebolaget Lm (Publ) Preservation of cell borders at hand-off within a smart antenna cellular system
US6487243B1 (en) 1999-03-08 2002-11-26 International Business Machines Corporation Modems, methods, and computer program products for recovering from errors in a tone reversal sequence between two modems
US6317435B1 (en) 1999-03-08 2001-11-13 Qualcomm Incorporated Method and apparatus for maximizing the use of available capacity in a communication system
US6337657B1 (en) * 1999-03-12 2002-01-08 Topcon Positioning Systems, Inc. Methods and apparatuses for reducing errors in the measurement of the coordinates and time offset in satellite positioning system receivers
US6987746B1 (en) * 1999-03-15 2006-01-17 Lg Information & Communications, Ltd. Pilot signals for synchronization and/or channel estimation
US6693952B1 (en) 1999-03-16 2004-02-17 Lucent Technologies Inc. Dynamic code allocation for downlink shared channels
KR20000060428A (ko) 1999-03-16 2000-10-16 윤종용 코드분할다중접속 시스템에서 기지국간 직접 연결을 이용한 소프트/소프터 핸드오프의 강화 방법
US7151761B1 (en) 1999-03-19 2006-12-19 Telefonaktiebolaget L M Ericsson (Publ) Code reservation for interference measurement in a CDMA radiocommunication system
US6483820B1 (en) 1999-03-22 2002-11-19 Ericsson Inc. System and method for dynamic radio resource allocation for non-transparent high-speed circuit-switched data services
US6430401B1 (en) 1999-03-29 2002-08-06 Lucent Technologies Inc. Technique for effectively communicating multiple digital representations of a signal
GB2348776B (en) 1999-04-06 2003-07-09 Motorola Ltd A communications network and method of allocating resource thefor
US6249683B1 (en) 1999-04-08 2001-06-19 Qualcomm Incorporated Forward link power control of multiple data streams transmitted to a mobile station using a common power control channel
EP1047209A1 (en) 1999-04-19 2000-10-25 Interuniversitair Micro-Elektronica Centrum Vzw A method and apparatus for multiuser transmission
US6937665B1 (en) 1999-04-19 2005-08-30 Interuniversitaire Micron Elektronica Centrum Method and apparatus for multi-user transmission
JP4224168B2 (ja) 1999-04-23 2009-02-12 パナソニック株式会社 基地局装置及びピーク電力抑圧方法
US6614857B1 (en) 1999-04-23 2003-09-02 Lucent Technologies Inc. Iterative channel estimation and compensation based thereon
WO2001001609A1 (en) 1999-05-12 2001-01-04 Samsung Electronics Co., Ltd. Channel assignment method for a base station in a mobile communication system
JP3236273B2 (ja) 1999-05-17 2001-12-10 三菱電機株式会社 マルチキャリア伝送システムおよびマルチキャリア変調方法
US6445917B1 (en) 1999-05-19 2002-09-03 Telefonaktiebolaget Lm Ericsson (Publ) Mobile station measurements with event-based reporting
US6674787B1 (en) * 1999-05-19 2004-01-06 Interdigital Technology Corporation Raising random access channel packet payload
US6674810B1 (en) 1999-05-27 2004-01-06 3Com Corporation Method and apparatus for reducing peak-to-average power ratio in a discrete multi-tone signal
JP2001057545A (ja) 1999-06-02 2001-02-27 Texas Instr Inc <Ti> スペクトラム拡散チャネルの推定方法と装置
US6631126B1 (en) 1999-06-11 2003-10-07 Lucent Technologies Inc. Wireless communications using circuit-oriented and packet-oriented frame selection/distribution functions
US6539213B1 (en) * 1999-06-14 2003-03-25 Time Domain Corporation System and method for impulse radio power control
FR2794915A1 (fr) 1999-06-14 2000-12-15 Canon Kk Procede et dispositif d'emission, procede et dispositif de reception, et systemes les mettant en oeuvre
US7095708B1 (en) 1999-06-23 2006-08-22 Cingular Wireless Ii, Llc Methods and apparatus for use in communicating voice and high speed data in a wireless communication system
JP3518426B2 (ja) 1999-06-30 2004-04-12 Ｋｄｄｉ株式会社 Ｃｄｍａ移動通信システムにおける符号割当方法
US6363060B1 (en) * 1999-06-30 2002-03-26 Qualcomm Incorporated Method and apparatus for fast WCDMA acquisition
US6657949B1 (en) 1999-07-06 2003-12-02 Cisco Technology, Inc. Efficient request access for OFDM systems
AU6696300A (en) 1999-07-28 2001-02-19 Ciba Specialty Chemicals Holding Inc. Water-soluble granules of salen-type manganese complexes
US6831943B1 (en) 1999-08-13 2004-12-14 Texas Instruments Incorporated Code division multiple access wireless system with closed loop mode using ninety degree phase rotation and beamformer verification
KR100361223B1 (ko) 1999-08-14 2002-11-23 주식회사 모리아테크놀로지 무선 이동통신에서 파일럿 채널 상에 페이징 정보를 천공시키는 시스템
JP2001069046A (ja) 1999-08-30 2001-03-16 Fujitsu Ltd 送受信システムおよび受信装置
US6542743B1 (en) 1999-08-31 2003-04-01 Qualcomm, Incorporated Method and apparatus for reducing pilot search times utilizing mobile station location information
US6765969B1 (en) 1999-09-01 2004-07-20 Motorola, Inc. Method and device for multi-user channel estimation
US6928047B1 (en) 1999-09-11 2005-08-09 The University Of Delaware Precoded OFDM systems robust to spectral null channels and vector OFDM systems with reduced cyclic prefix length
US6654431B1 (en) 1999-09-15 2003-11-25 Telcordia Technologies, Inc. Multicarrier personal access communication system
BR0014344A (pt) 1999-10-02 2002-11-05 Samsung Electronics Co Ltd Aparelho e método para transmitir dados de controle por um canal num sistema de comunicação cdma
RU2242091C2 (ru) 1999-10-02 2004-12-10 Самсунг Электроникс Ко., Лтд. Устройство и способ стробирования данных, передаваемых по каналу управления в системе связи мдкр
US6870882B1 (en) * 1999-10-08 2005-03-22 At&T Corp. Finite-length equalization over multi-input multi-output channels
RU2257609C2 (ru) 1999-10-21 2005-07-27 Мацусита Электрик Индастриал Ко., Лтд. Устройство доступа к полупроводниковой карте памяти, компьютерно-считываемый носитель записи, способ инициализации и полупроводниковая карта памяти
US6337659B1 (en) 1999-10-25 2002-01-08 Gamma Nu, Inc. Phased array base station antenna system having distributed low power amplifiers
US6985466B1 (en) * 1999-11-09 2006-01-10 Arraycomm, Inc. Downlink signal processing in CDMA systems utilizing arrays of antennae
US6721568B1 (en) 1999-11-10 2004-04-13 Telefonaktiebolaget Lm Ericsson (Publ) Admission control in a mobile radio communications system
KR100602022B1 (ko) 1999-12-15 2006-07-20 유티스타콤코리아 유한회사 이동통신 시스템에서 동기식 기지국과 비동기식 기지국간핸드오프에 필요한 파라메타 전송방법
EP1230761B1 (en) * 1999-11-17 2005-10-19 Telefonaktiebolaget LM Ericsson (publ) Acceleration dependent channel switching in mobile telecommunications
US6466800B1 (en) 1999-11-19 2002-10-15 Siemens Information And Communication Mobile, Llc Method and system for a wireless communication system incorporating channel selection algorithm for 2.4 GHz direct sequence spread spectrum cordless telephone system
JP3289718B2 (ja) 1999-11-24 2002-06-10 日本電気株式会社 時分割多重アクセス方法及び基準局装置、端末局装置
DE19957288C1 (de) 1999-11-29 2001-05-10 Siemens Ag Verfahren zur Signalisierung einer Funkkanalstruktur in einem Funk-Kommunikationssystem
AU760229B2 (en) 1999-11-29 2003-05-08 Qualcomm Incorporated Apparatus and method for assigning a common packet channel in a CDMA communication system
US6763009B1 (en) 1999-12-03 2004-07-13 Lucent Technologies Inc. Down-link transmission scheduling in CDMA data networks
US6351499B1 (en) 1999-12-15 2002-02-26 Iospan Wireless, Inc. Method and wireless systems using multiple antennas and adaptive control for maximizing a communication parameter
US6690951B1 (en) * 1999-12-20 2004-02-10 Telefonaktiebolaget Lm Ericsson (Publ) Dynamic size allocation system and method
US6628673B1 (en) 1999-12-29 2003-09-30 Atheros Communications, Inc. Scalable communication system using overlaid signals and multi-carrier frequency communication
US6678318B1 (en) 2000-01-11 2004-01-13 Agere Systems Inc. Method and apparatus for time-domain equalization in discrete multitone transceivers
US6888809B1 (en) 2000-01-13 2005-05-03 Lucent Technologies Inc. Space-time processing for multiple-input, multiple-output, wireless systems
US6907020B2 (en) 2000-01-20 2005-06-14 Nortel Networks Limited Frame structures supporting voice or streaming communications with high speed data communications in wireless access networks
US7463600B2 (en) 2000-01-20 2008-12-09 Nortel Networks Limited Frame structure for variable rate wireless channels transmitting high speed data
US6804307B1 (en) 2000-01-27 2004-10-12 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for efficient transmit diversity using complex space-time block codes
KR100387034B1 (ko) 2000-02-01 2003-06-11 삼성전자주식회사 무선통신 시스템의 패킷데이타 서비스를 위한스케듈링장치 및 방법
FI117465B (fi) 2000-02-03 2006-10-31 Danisco Sweeteners Oy Menetelmä pureskeltavien ytimien kovapinnoittamiseksi
US6754511B1 (en) 2000-02-04 2004-06-22 Harris Corporation Linear signal separation using polarization diversity
WO2001059968A1 (en) * 2000-02-09 2001-08-16 Golden Bridge Technology, Inc. Collision avoidance
US6546248B1 (en) 2000-02-10 2003-04-08 Qualcomm, Incorporated Method and apparatus for generating pilot strength measurement messages
CN1107358C (zh) 2000-02-24 2003-04-30 信息产业部电信科学技术研究院 分布式智能天线系统
JP3826653B2 (ja) 2000-02-25 2006-09-27 Ｋｄｄｉ株式会社 無線通信システムのサブキャリア割当方法
WO2001065637A2 (en) * 2000-02-29 2001-09-07 Hrl Laboratories, Llc Cooperative mobile antenna system
JP2001245355A (ja) 2000-03-01 2001-09-07 Mitsubishi Electric Corp 移動通信におけるパケット伝送システム
JP2001249802A (ja) 2000-03-07 2001-09-14 Sony Corp 伝送方法、伝送システム、伝送制御装置及び入力装置
KR100493068B1 (ko) 2000-03-08 2005-06-02 삼성전자주식회사 이동통신시스템에서 피드백 정보를 이용하는 반맹목적방식의 송신안테나어레이 장치 및 방법
WO2001069814A1 (en) 2000-03-15 2001-09-20 Nokia Corporation Transmit diversity method and system
US6473467B1 (en) 2000-03-22 2002-10-29 Qualcomm Incorporated Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system
US6940845B2 (en) 2000-03-23 2005-09-06 At & T, Corp. Asymmetric measurement-based dynamic packet assignment system and method for wireless data services
JP2001285927A (ja) 2000-03-29 2001-10-12 Matsushita Electric Ind Co Ltd 通信端末装置及び無線通信方法
US6493331B1 (en) 2000-03-30 2002-12-10 Qualcomm Incorporated Method and apparatus for controlling transmissions of a communications systems
AU2000238190A1 (en) 2000-04-07 2001-10-23 Nokia Corporation Multi-antenna transmission method and system
US7289570B2 (en) 2000-04-10 2007-10-30 Texas Instruments Incorporated Wireless communications
US6934275B1 (en) 2000-04-17 2005-08-23 Motorola, Inc. Apparatus and method for providing separate forward dedicated and shared control channels in a communications system
US6961364B1 (en) 2000-04-18 2005-11-01 Flarion Technologies, Inc. Base station identification in orthogonal frequency division multiplexing based spread spectrum multiple access systems
US6954481B1 (en) 2000-04-18 2005-10-11 Flarion Technologies, Inc. Pilot use in orthogonal frequency division multiplexing based spread spectrum multiple access systems
US6807146B1 (en) 2000-04-21 2004-10-19 Atheros Communications, Inc. Protocols for scalable communication system using overland signals and multi-carrier frequency communication
EP1277317A2 (en) 2000-04-22 2003-01-22 Atheros Communications, Inc. Multi-carrier communication systems employing variable ofdm-symbol rates and number of carriers
US6748220B1 (en) 2000-05-05 2004-06-08 Nortel Networks Limited Resource allocation in wireless networks
US6987729B1 (en) 2000-05-11 2006-01-17 Lucent Technologies Inc. Method and apparatus for admission management in wireless communication systems
FI20001133A (fi) 2000-05-12 2001-11-13 Nokia Corp Menetelmä päätelaitteiden ja yhteysaseman välisen tiedonsiirron järjestämiseksi tiedonsiirtojärjestelmässä
FI20001160A (fi) 2000-05-15 2001-11-16 Nokia Networks Oy Pilottisignaalin toteuttamismenetelmä
DE60038198T2 (de) 2000-05-17 2009-03-26 Matsushita Electric Industrial Co., Ltd., Kadoma-shi Hybrides ARQ-System mit Daten- und Kontrollkanal für Datenpaketübertragung
US6529525B1 (en) * 2000-05-19 2003-03-04 Motorola, Inc. Method for supporting acknowledged transport layer protocols in GPRS/edge host application
KR100370746B1 (ko) 2000-05-30 2003-02-05 한국전자통신연구원 다차원 직교 자원 도약 다중화 통신 방식 및 장치
CA2310188A1 (en) 2000-05-30 2001-11-30 Mark J. Frazer Communication structure with channels configured responsive to reception quality
GB2363256B (en) 2000-06-07 2004-05-12 Motorola Inc Adaptive antenna array and method of controlling operation thereof
US7050402B2 (en) 2000-06-09 2006-05-23 Texas Instruments Incorporated Wireless communications with frequency band selection
US7248841B2 (en) 2000-06-13 2007-07-24 Agee Brian G Method and apparatus for optimization of wireless multipoint electromagnetic communication networks
US6701165B1 (en) * 2000-06-21 2004-03-02 Agere Systems Inc. Method and apparatus for reducing interference in non-stationary subscriber radio units using flexible beam selection
US6337983B1 (en) 2000-06-21 2002-01-08 Motorola, Inc. Method for autonomous handoff in a wireless communication system
US20020015405A1 (en) * 2000-06-26 2002-02-07 Risto Sepponen Error correction of important fields in data packet communications in a digital mobile radio network
JP2002016531A (ja) 2000-06-27 2002-01-18 Nec Corp Ｃｄｍａ通信方式及びその方法
JP2002026790A (ja) 2000-07-03 2002-01-25 Matsushita Electric Ind Co Ltd 無線通信装置及び無線通信方法
DE10032426B4 (de) 2000-07-04 2006-01-12 Siemens Ag Strahlformungsverfahren
WO2002004936A1 (en) 2000-07-11 2002-01-17 Japan Science And Technology Corporation Probe for mass spectrometry of liquid sample
IT1318161B1 (it) 2000-07-14 2003-07-23 Cit Alcatel Metodo e dispositivo per il recupero di portante in sistemi ofdm
FR2814301B1 (fr) 2000-07-17 2004-11-12 Telediffusion De France Tdf Synchronisation d'un signal amrf
US7418043B2 (en) 2000-07-19 2008-08-26 Lot 41 Acquisition Foundation, Llc Software adaptable high performance multicarrier transmission protocol
WO2002009334A1 (fr) 2000-07-26 2002-01-31 Mitsubishi Denki Kabushiki Kaisha Dispositif de communication a acces multiple par repartition de code (amrc) multiporteuse, dispositif d'emission amrc multiporteuse et dispositif de reception amrc multiporteuse
GB2366938B (en) 2000-08-03 2004-09-01 Orange Personal Comm Serv Ltd Authentication in a mobile communications network
DE10039429A1 (de) 2000-08-11 2002-03-07 Siemens Ag Verfahren zur Signalübertragung in einem Funk-Kommunikationssystem
GB0020088D0 (en) 2000-08-15 2000-10-04 Fujitsu Ltd Adaptive beam forming
US6980540B1 (en) 2000-08-16 2005-12-27 Lucent Technologies Inc. Apparatus and method for acquiring an uplink traffic channel, in wireless communications systems
CN1126382C (zh) * 2000-08-24 2003-10-29 深圳市中兴通讯股份有限公司 一种数字通信系统中的信道交织方法
US6487184B1 (en) 2000-08-25 2002-11-26 Motorola, Inc. Method and apparatus for supporting radio acknowledgement information for a uni-directional user data channel
US6850481B2 (en) * 2000-09-01 2005-02-01 Nortel Networks Limited Channels estimation for multiple input—multiple output, orthogonal frequency division multiplexing (OFDM) system
US6985434B2 (en) * 2000-09-01 2006-01-10 Nortel Networks Limited Adaptive time diversity and spatial diversity for OFDM
US6937592B1 (en) 2000-09-01 2005-08-30 Intel Corporation Wireless communications system that supports multiple modes of operation
US6898441B1 (en) 2000-09-12 2005-05-24 Lucent Technologies Inc. Communication system having a flexible transmit configuration
US7295509B2 (en) 2000-09-13 2007-11-13 Qualcomm, Incorporated Signaling method in an OFDM multiple access system
US9130810B2 (en) 2000-09-13 2015-09-08 Qualcomm Incorporated OFDM communications methods and apparatus
US6694147B1 (en) 2000-09-15 2004-02-17 Flarion Technologies, Inc. Methods and apparatus for transmitting information between a basestation and multiple mobile stations
US6802035B2 (en) 2000-09-19 2004-10-05 Intel Corporation System and method of dynamically optimizing a transmission mode of wirelessly transmitted information
US6760882B1 (en) 2000-09-19 2004-07-06 Intel Corporation Mode selection for data transmission in wireless communication channels based on statistical parameters
CN1126307C (zh) * 2000-09-22 2003-10-29 信息产业部电信传输研究所 一种多相正交扩频码生成及解扩方法
US6842487B1 (en) * 2000-09-22 2005-01-11 Telefonaktiebolaget Lm Ericsson (Publ) Cyclic delay diversity for mitigating intersymbol interference in OFDM systems
US6658258B1 (en) 2000-09-29 2003-12-02 Lucent Technologies Inc. Method and apparatus for estimating the location of a mobile terminal
US6778513B2 (en) 2000-09-29 2004-08-17 Arraycomm, Inc. Method and apparatus for separting multiple users in a shared-channel communication system
US6496790B1 (en) 2000-09-29 2002-12-17 Intel Corporation Management of sensors in computer systems
US7349371B2 (en) 2000-09-29 2008-03-25 Arraycomm, Llc Selecting random access channels
JP2002111556A (ja) 2000-10-02 2002-04-12 Ntt Docomo Inc 基地局装置
KR100452536B1 (ko) 2000-10-02 2004-10-12 가부시키가이샤 엔.티.티.도코모 이동통신기지국 장치
US7072315B1 (en) 2000-10-10 2006-07-04 Adaptix, Inc. Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks
FR2815507B1 (fr) 2000-10-16 2003-01-31 Cit Alcatel Procede de gestion des ressources radio dans un reseau de telecommunication interactif
US6704571B1 (en) * 2000-10-17 2004-03-09 Cisco Technology, Inc. Reducing data loss during cell handoffs
US6870808B1 (en) 2000-10-18 2005-03-22 Adaptix, Inc. Channel allocation in broadband orthogonal frequency-division multiple-access/space-division multiple-access networks
WO2002033856A1 (en) 2000-10-20 2002-04-25 Samsung Electronics Co., Ltd Apparatus and method for determining a data rate of packet data in a mobile communication system
US6907270B1 (en) 2000-10-23 2005-06-14 Qualcomm Inc. Method and apparatus for reduced rank channel estimation in a communications system
US6788959B2 (en) 2000-10-30 2004-09-07 Nokia Corporation Method and apparatus for transmitting and receiving dynamic configuration parameters in a third generation cellular telephone network
ATE468723T1 (de) 2000-11-03 2010-06-15 Sony Deutschland Gmbh Sendeleistungsregelung für ofdm- kommunikationsverbindungen
US6567387B1 (en) 2000-11-07 2003-05-20 Intel Corporation System and method for data transmission from multiple wireless base transceiver stations to a subscriber unit
CA2428061A1 (en) 2000-11-07 2002-05-16 Nokia Corporation System for uplink scheduling of packet data traffic in wireless system
US20020090024A1 (en) 2000-11-15 2002-07-11 Tan Keng Tiong Method and apparatus for non-linear code-division multiple access technology
US8634481B1 (en) 2000-11-16 2014-01-21 Alcatel Lucent Feedback technique for wireless systems with multiple transmit and receive antennas
US7447270B1 (en) 2000-11-17 2008-11-04 Nokia Corporation Method for controlling the data signal weighting in multi-element transceivers and corresponding devices and telecommunications network
ATE383723T1 (de) 2000-11-28 2008-01-15 Ericsson Telefon Ab L M Teilnehmergerät-abbau mittels eines rufverfahrens in einem zellularen kommunikationssystem
GB0029424D0 (en) * 2000-12-02 2001-01-17 Koninkl Philips Electronics Nv Radio communication system
DE60128132T2 (de) * 2000-12-11 2007-12-27 Sharp K.K. Funkkommunikationssystem
JP4213466B2 (ja) 2000-12-15 2009-01-21 アダプティックス インコーポレイテッド 適応クラスタ構成及び切替による多重キャリア通信
US20020077152A1 (en) 2000-12-15 2002-06-20 Johnson Thomas J. Wireless communication methods and systems using multiple overlapping sectored cells
US6947748B2 (en) 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
CN100456758C (zh) 2000-12-15 2009-01-28 昂达博思公司 具有基于组的副载波分配的多载波通信方法
US6862268B2 (en) 2000-12-29 2005-03-01 Nortel Networks, Ltd Method and apparatus for managing a CDMA supplemental channel
US6920119B2 (en) 2001-01-09 2005-07-19 Motorola, Inc. Method for scheduling and allocating data transmissions in a broad-band communications system
US6829293B2 (en) 2001-01-16 2004-12-07 Mindspeed Technologies, Inc. Method and apparatus for line probe signal processing
US6801790B2 (en) 2001-01-17 2004-10-05 Lucent Technologies Inc. Structure for multiple antenna configurations
US6813284B2 (en) 2001-01-17 2004-11-02 Qualcomm Incorporated Method and apparatus for allocating data streams given transmission time interval (TTI) constraints
EP1227601A1 (en) 2001-01-25 2002-07-31 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Downlink scheduling using parallel code trees
US6954448B2 (en) 2001-02-01 2005-10-11 Ipr Licensing, Inc. Alternate channel for carrying selected message types
RU2192094C1 (ru) 2001-02-05 2002-10-27 Гармонов Александр Васильевич Способ когерентной разнесенной передачи сигнала
FR2820574B1 (fr) 2001-02-08 2005-08-05 Wavecom Sa Procede d'extraction d'un motif de symboles de reference servant a estimer la fonction de transfert d'un canal de transmission, signal, dispositif et procedes correspondants
US6985453B2 (en) 2001-02-15 2006-01-10 Qualcomm Incorporated Method and apparatus for link quality feedback in a wireless communication system
US7120134B2 (en) 2001-02-15 2006-10-10 Qualcomm, Incorporated Reverse link channel architecture for a wireless communication system
US6975868B2 (en) 2001-02-21 2005-12-13 Qualcomm Incorporated Method and apparatus for IS-95B reverse link supplemental code channel frame validation and fundamental code channel rate decision improvement
US20020160781A1 (en) 2001-02-23 2002-10-31 Gunnar Bark System, method and apparatus for facilitating resource allocation in a communication system
US6937641B2 (en) 2001-02-28 2005-08-30 Golden Bridge Technology, Inc. Power-controlled random access
US6930470B2 (en) 2001-03-01 2005-08-16 Nortel Networks Limited System and method for code division multiple access communication in a wireless communication environment
US6675012B2 (en) * 2001-03-08 2004-01-06 Nokia Mobile Phones, Ltd. Apparatus, and associated method, for reporting a measurement summary in a radio communication system
US6940827B2 (en) 2001-03-09 2005-09-06 Adaptix, Inc. Communication system using OFDM for one direction and DSSS for another direction
US6934340B1 (en) 2001-03-19 2005-08-23 Cisco Technology, Inc. Adaptive control system for interference rejections in a wireless communications system
US6478422B1 (en) 2001-03-19 2002-11-12 Richard A. Hansen Single bifocal custom shooters glasses
US6771706B2 (en) * 2001-03-23 2004-08-03 Qualcomm Incorporated Method and apparatus for utilizing channel state information in a wireless communication system
US6748024B2 (en) 2001-03-28 2004-06-08 Nokia Corporation Non-zero complex weighted space-time code for multiple antenna transmission
US7042897B1 (en) 2001-04-05 2006-05-09 Arcwave, Inc Medium access control layer protocol in a distributed environment
US6859503B2 (en) * 2001-04-07 2005-02-22 Motorola, Inc. Method and system in a transceiver for controlling a multiple-input, multiple-output communications channel
US7145959B2 (en) 2001-04-25 2006-12-05 Magnolia Broadband Inc. Smart antenna based spectrum multiplexing using existing pilot signals for orthogonal frequency division multiplexing (OFDM) modulations
US7230941B2 (en) 2001-04-26 2007-06-12 Qualcomm Incorporated Preamble channel decoding
US6625172B2 (en) 2001-04-26 2003-09-23 Joseph P. Odenwalder Rescheduling scheduled transmissions
US6611231B2 (en) * 2001-04-27 2003-08-26 Vivato, Inc. Wireless packet switched communication systems and networks using adaptively steered antenna arrays
US7188300B2 (en) 2001-05-01 2007-03-06 Telefonaktiebolaget Lm Ericsson (Publ) Flexible layer one for radio interface to PLMN
US7042856B2 (en) 2001-05-03 2006-05-09 Qualcomm, Incorporation Method and apparatus for controlling uplink transmissions of a wireless communication system
EP1255369A1 (en) 2001-05-04 2002-11-06 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Link adaptation for wireless MIMO transmission schemes
US6785341B2 (en) 2001-05-11 2004-08-31 Qualcomm Incorporated Method and apparatus for processing data in a multiple-input multiple-output (MIMO) communication system utilizing channel state information
RU2208911C2 (ru) 2001-05-14 2003-07-20 Гармонов Александр Васильевич Способ разнесенной передачи сигнала и устройство для его реализации
US6662024B2 (en) 2001-05-16 2003-12-09 Qualcomm Incorporated Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system
US7047016B2 (en) 2001-05-16 2006-05-16 Qualcomm, Incorporated Method and apparatus for allocating uplink resources in a multiple-input multiple-output (MIMO) communication system
EP1259008B1 (en) 2001-05-17 2006-10-04 SAMSUNG ELECTRONICS Co. Ltd. Mobile communication apparatus with antenna array and mobile coomunication method therefor
US6751187B2 (en) * 2001-05-17 2004-06-15 Qualcomm Incorporated Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel transmission
FR2825208B1 (fr) 2001-05-22 2004-07-09 Cit Alcatel Procede d'attribution de ressources en communication dans un systeme de telecommunications du type mf-tdma
US7190734B2 (en) * 2001-05-25 2007-03-13 Regents Of The University Of Minnesota Space-time coded transmissions within a wireless communication network
US6904097B2 (en) 2001-06-01 2005-06-07 Motorola, Inc. Method and apparatus for adaptive signaling in a QAM communication system
US20020193146A1 (en) 2001-06-06 2002-12-19 Mark Wallace Method and apparatus for antenna diversity in a wireless communication system
EP1267513A3 (en) 2001-06-11 2006-07-26 Unique Broadband Systems, Inc. Multiplexing of multicarrier signals
WO2003001696A2 (en) 2001-06-21 2003-01-03 Flarion Technologies, Inc. Method of tone allocation for tone hopping sequences
US7027523B2 (en) 2001-06-22 2006-04-11 Qualcomm Incorporated Method and apparatus for transmitting data in a time division duplexed (TDD) communication system
CN1547861A (zh) * 2001-06-27 2004-11-17 ���˹���Ѷ��� 无线通信系统中控制信息的传递
GB0116015D0 (en) 2001-06-29 2001-08-22 Simoco Digital Systems Ltd Communications systems
US6963543B2 (en) 2001-06-29 2005-11-08 Qualcomm Incorporated Method and system for group call service
JP2003018054A (ja) 2001-07-02 2003-01-17 Ntt Docomo Inc 無線通信方法及びシステム並びに通信装置
US6751444B1 (en) 2001-07-02 2004-06-15 Broadstorm Telecommunications, Inc. Method and apparatus for adaptive carrier allocation and power control in multi-carrier communication systems
DE10132492A1 (de) 2001-07-03 2003-01-23 Hertz Inst Heinrich Adaptives Signalverarbeitungsverfahren zur bidirektionalen Funkübertragung in einem MIMO-Kanal und MIMO-System zur Verfahrensdurchführung
JP3607643B2 (ja) 2001-07-13 2005-01-05 松下電器産業株式会社 マルチキャリア送信装置、マルチキャリア受信装置、およびマルチキャリア無線通信方法
US7197282B2 (en) * 2001-07-26 2007-03-27 Ericsson Inc. Mobile station loop-back signal processing
US7236536B2 (en) 2001-07-26 2007-06-26 Lucent Technologies Inc. Method and apparatus for detection and decoding of signals received from a linear propagation channel
US20030027579A1 (en) 2001-08-03 2003-02-06 Uwe Sydon System for and method of providing an air interface with variable data rate by switching the bit time
JP4318412B2 (ja) 2001-08-08 2009-08-26 富士通株式会社 通信システムにおける送受信装置及び送受信方法
KR100703295B1 (ko) 2001-08-18 2007-04-03 삼성전자주식회사 이동통신시스템에서 안테나 어레이를 이용한 데이터 송/수신 장치 및 방법
US6776765B2 (en) 2001-08-21 2004-08-17 Synovis Life Technologies, Inc. Steerable stylet
JP4127757B2 (ja) * 2001-08-21 2008-07-30 株式会社エヌ・ティ・ティ・ドコモ 無線通信システム、通信端末装置、及びバースト信号送信方法
KR100459557B1 (ko) * 2001-08-23 2004-12-03 삼성전자주식회사 고속 순방향 패킷 접속 통신 시스템에서 데이터 상태정보를 나타내기 위한 혼화 자동 재전송 요구 채널 번호할당 방법
JP2003069472A (ja) 2001-08-24 2003-03-07 Matsushita Electric Ind Co Ltd 受信端末装置及び通信システム
KR100474689B1 (ko) 2001-08-30 2005-03-08 삼성전자주식회사 이동통신 시스템에서 소프트 핸드오프 도중의 전력제어 방법
WO2003023995A1 (en) * 2001-09-05 2003-03-20 Nokia Corporation A closed-loop signaling method for controlling multiple transmit beams and correspondingy adapted transceiver device
DE60128155T2 (de) * 2001-09-07 2008-01-03 Telefonaktiebolaget Lm Ericsson (Publ) Verfahren und anordnungen zur erzielung einer dynamischen betriebsmittelverteilungsrichtlinie in paketgestützten kommunikationsnetzen
FR2829642B1 (fr) 2001-09-12 2004-01-16 Eads Defence & Security Ntwk Signal multiporteuses, procede de poursuite d'un canal de transmission a partir d'un tel signal et dispositif pour sa mise en oeuvre
US7106319B2 (en) 2001-09-14 2006-09-12 Seiko Epson Corporation Power supply circuit, voltage conversion circuit, semiconductor device, display device, display panel, and electronic equipment
AU2002327681A1 (en) 2001-09-24 2003-04-07 Atheros Communications, Inc. Method and system for variable rate acknowledgement for wireless communication protocols
JP2003101515A (ja) 2001-09-25 2003-04-04 Sony Corp 無線通信システム、基地局、移動局、送信制御方法及びプログラム格納媒体
KR100440182B1 (ko) 2001-09-29 2004-07-14 삼성전자주식회사 음영지역에서의 퀵페이징 방법
RU2207723C1 (ru) 2001-10-01 2003-06-27 Военный университет связи Способ распределения ресурсов в системе электросвязи с множественным доступом
US7218906B2 (en) 2001-10-04 2007-05-15 Wisconsin Alumni Research Foundation Layered space time processing in a multiple antenna system
US7548506B2 (en) 2001-10-17 2009-06-16 Nortel Networks Limited System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design
US7248559B2 (en) 2001-10-17 2007-07-24 Nortel Networks Limited Scattered pilot pattern and channel estimation method for MIMO-OFDM systems
CA2408423C (en) 2001-10-17 2013-12-24 Nec Corporation Mobile communication system, communication control method, base station and mobile station to be used in the same
JP3675433B2 (ja) 2001-10-17 2005-07-27 日本電気株式会社 移動通信システム及び通信制御方法並びにそれに用いる基地局、移動局
US7773699B2 (en) 2001-10-17 2010-08-10 Nortel Networks Limited Method and apparatus for channel quality measurements
US7116652B2 (en) 2001-10-18 2006-10-03 Lucent Technologies Inc. Rate control technique for layered architectures with multiple transmit and receive antennas
US7349667B2 (en) 2001-10-19 2008-03-25 Texas Instruments Incorporated Simplified noise estimation and/or beamforming for wireless communications
KR100452639B1 (ko) 2001-10-20 2004-10-14 한국전자통신연구원 위성 이동 통신 시스템에서 공통 패킷 채널 접속 방법
KR100547847B1 (ko) 2001-10-26 2006-01-31 삼성전자주식회사 이동통신 시스템에서 역방향 링크의 제어 장치 및 방법
US20030086393A1 (en) 2001-11-02 2003-05-08 Subramanian Vasudevan Method for allocating wireless communication resources
US7164649B2 (en) * 2001-11-02 2007-01-16 Qualcomm, Incorporated Adaptive rate control for OFDM communication system
US20030125040A1 (en) 2001-11-06 2003-07-03 Walton Jay R. Multiple-access multiple-input multiple-output (MIMO) communication system
US6909707B2 (en) 2001-11-06 2005-06-21 Motorola, Inc. Method and apparatus for pseudo-random noise offset reuse in a multi-sector CDMA system
DE60209523T2 (de) 2001-11-07 2006-09-07 Koninklijke Philips Electronics N.V. Verfahren zur auswahl einer teilmenge von antennen aus mehreren antennen in einem diversity-system
US7453801B2 (en) 2001-11-08 2008-11-18 Qualcomm Incorporated Admission control and resource allocation in a communication system supporting application flows having quality of service requirements
WO2003043262A1 (en) 2001-11-13 2003-05-22 Telcordia Technologies, Inc. Method and system for spectrally compatible remote terminal adsl deployment
GB2382265B (en) 2001-11-14 2004-06-09 Toshiba Res Europ Ltd Emergency rescue aid
SE0103853D0 (sv) * 2001-11-15 2001-11-15 Ericsson Telefon Ab L M Method and system of retransmission
JP3637965B2 (ja) 2001-11-22 2005-04-13 日本電気株式会社 無線通信システム
JP3756110B2 (ja) 2001-11-29 2006-03-15 シャープ株式会社 無線通信装置
TW595857U (en) 2001-11-29 2004-06-21 Us 091219345
DE60233255D1 (de) 2001-12-03 2009-09-17 Nokia Corp Auf richtlinien basierende mechanismen zur auswahl von zugriffs-routern und mobilkontext
JP3895165B2 (ja) 2001-12-03 2007-03-22 株式会社エヌ・ティ・ティ・ドコモ 通信制御システム、通信制御方法、通信基地局及び移動端末
US7154936B2 (en) 2001-12-03 2006-12-26 Qualcomm, Incorporated Iterative detection and decoding for a MIMO-OFDM system
US6799043B2 (en) 2001-12-04 2004-09-28 Qualcomm, Incorporated Method and apparatus for a reverse link supplemental channel scheduling
JP3955463B2 (ja) 2001-12-05 2007-08-08 ソフトバンクテレコム株式会社 直交周波数分割多重通信システム
US20030112745A1 (en) 2001-12-17 2003-06-19 Xiangyang Zhuang Method and system of operating a coded OFDM communication system
US7054301B1 (en) 2001-12-31 2006-05-30 Arraycomm, Llc. Coordinated hopping in wireless networks using adaptive antenna arrays
US7020110B2 (en) 2002-01-08 2006-03-28 Qualcomm Incorporated Resource allocation for MIMO-OFDM communication systems
EP1467508B1 (en) 2002-01-10 2011-05-11 Fujitsu Limited Pilot multiplex method in ofdm system and ofdm receiving method
KR100547848B1 (ko) 2002-01-16 2006-02-01 삼성전자주식회사 다중 반송파 이동통신시스템에서 순방향 채널 상태 정보송수신 방법 및 장치
DE10240138A1 (de) 2002-01-18 2003-08-14 Siemens Ag Dynamische Zuordnung von Funkressourcen in einem Funk-Kommunikationssystem
US6954622B2 (en) 2002-01-29 2005-10-11 L-3 Communications Corporation Cooperative transmission power control method and system for CDMA communication systems
US20030142648A1 (en) 2002-01-31 2003-07-31 Samsung Electronics Co., Ltd. System and method for providing a continuous high speed packet data handoff
US7006557B2 (en) 2002-01-31 2006-02-28 Qualcomm Incorporated Time tracking loop for diversity pilots
JP2003235072A (ja) 2002-02-06 2003-08-22 Ntt Docomo Inc 無線リソース割当て方法、無線リソース割当て装置及び移動通信システム
US7031742B2 (en) 2002-02-07 2006-04-18 Qualcomm Incorporation Forward and reverse link power control of serving and non-serving base stations in a wireless communication system
KR100547845B1 (ko) 2002-02-07 2006-01-31 삼성전자주식회사 고속 순방향 패킷 접속 방식을 사용하는 통신 시스템에서서빙 고속 공통 제어 채널 셋 정보를 송수신하는 장치 및방법
RU2237379C2 (ru) 2002-02-08 2004-09-27 Самсунг Электроникс Способ формирования диаграммы направленности адаптивной антенной решетки базовой станции и устройство для его реализации (варианты)
WO2003069832A1 (de) 2002-02-13 2003-08-21 Siemens Aktiengesellschaft Methode zum beamforming eines mehrnutzempfängers mit kanalschätzung
US7009500B2 (en) 2002-02-13 2006-03-07 Ford Global Technologies, Llc Method for operating a pre-crash sensing system in a vehicle having a countermeasure system using stereo cameras
IL151937A0 (en) 2002-02-13 2003-07-31 Witcom Ltd Near-field spatial multiplexing
US7050759B2 (en) 2002-02-19 2006-05-23 Qualcomm Incorporated Channel quality feedback mechanism and method
JP2003249907A (ja) 2002-02-22 2003-09-05 Hitachi Kokusai Electric Inc Ｏｆｄｍ方式の伝送装置
US6862271B2 (en) 2002-02-26 2005-03-01 Qualcomm Incorporated Multiple-input, multiple-output (MIMO) systems with multiple transmission modes
US6636568B2 (en) 2002-03-01 2003-10-21 Qualcomm Data transmission with non-uniform distribution of data rates for a multiple-input multiple-output (MIMO) system
US7099299B2 (en) 2002-03-04 2006-08-29 Agency For Science, Technology And Research CDMA system with frequency domain equalization
US6714769B2 (en) 2002-03-08 2004-03-30 Interdigital Technology Corporation Method and system for implementing smart antennas and diversity techniques
US7039356B2 (en) * 2002-03-12 2006-05-02 Blue7 Communications Selecting a set of antennas for use in a wireless communication system
KR100464014B1 (ko) 2002-03-21 2004-12-30 엘지전자 주식회사 다중 입출력 이동 통신 시스템에서의 폐루프 신호 처리 방법
US7197084B2 (en) 2002-03-27 2007-03-27 Qualcomm Incorporated Precoding for a multipath channel in a MIMO system
JP2003292667A (ja) 2002-03-29 2003-10-15 Jsr Corp 架橋発泡用熱可塑性エラストマー組成物、成形品の製造方法、および成形品
US6741587B2 (en) 2002-04-02 2004-05-25 Nokia Corporation Inter-frequency measurements with MIMO terminals
US6850741B2 (en) 2002-04-04 2005-02-01 Agency For Science, Technology And Research Method for selecting switched orthogonal beams for downlink diversity transmission
US7508804B2 (en) 2002-04-05 2009-03-24 Alcatel-Lucent Usa Inc. Shared signaling for multiple user equipment
KR100896682B1 (ko) 2002-04-09 2009-05-14 삼성전자주식회사 송/수신 다중 안테나를 포함하는 이동 통신 장치 및 방법
JP2003348598A (ja) * 2002-04-12 2003-12-05 Seiko Epson Corp メモリ効率のいい圧縮領域ビデオ処理のための且つ因数分解及び整数近似法を用いる高速逆動き補償のための方法並びに装置
EP1499052A4 (en) 2002-04-15 2008-07-16 Matsushita Electric Ind Co Ltd RECEIVER AND RECEIVING METHOD THEREOF
US7522673B2 (en) 2002-04-22 2009-04-21 Regents Of The University Of Minnesota Space-time coding using estimated channel information
ES2351438T3 (es) 2002-04-25 2011-02-04 Powerwave Cognition, Inc. Utilización dinámica de recursos inalámbricos.
JP2003318857A (ja) 2002-04-25 2003-11-07 Mitsubishi Electric Corp デジタル放送受信機
US7161971B2 (en) 2002-04-29 2007-01-09 Qualcomm, Incorporated Sending transmission format information on dedicated channels
US6839336B2 (en) 2002-04-29 2005-01-04 Qualcomm, Incorporated Acknowledging broadcast transmissions
US7170876B2 (en) 2002-04-30 2007-01-30 Qualcomm, Inc. Outer-loop scheduling design for communication systems with channel quality feedback mechanisms
US7170937B2 (en) * 2002-05-01 2007-01-30 Texas Instruments Incorporated Complexity-scalable intra-frame prediction technique
US6836670B2 (en) 2002-05-09 2004-12-28 Casabyte, Inc. Method, apparatus and article to remotely associate wireless communications devices with subscriber identities and /or proxy wireless communications devices
JP4334274B2 (ja) 2002-05-16 2009-09-30 株式会社エヌ・ティ・ティ・ドコモ マルチキャリア伝送用送信機及びマルチキャリア伝送方法
KR100689399B1 (ko) 2002-05-17 2007-03-08 삼성전자주식회사 이동통신시스템에서 스마트 안테나의 순방향 송신빔 형성장치 및 방법
JP2003347985A (ja) 2002-05-22 2003-12-05 Fujitsu Ltd 無線基地局装置及びその省電力方法
JP4067873B2 (ja) 2002-05-24 2008-03-26 三菱電機株式会社 無線伝送装置
GB0212165D0 (en) * 2002-05-27 2002-07-03 Nokia Corp A wireless system
US6917602B2 (en) 2002-05-29 2005-07-12 Nokia Corporation System and method for random access channel capture with automatic retransmission request
US8699505B2 (en) 2002-05-31 2014-04-15 Qualcomm Incorporated Dynamic channelization code allocation
US7899067B2 (en) 2002-05-31 2011-03-01 Cisco Technology, Inc. Method and apparatus for generating and using enhanced tree bitmap data structures in determining a longest prefix match
US7366223B1 (en) 2002-06-06 2008-04-29 Arraycomm, Llc Modifying hopping sequences in wireless networks
KR100548311B1 (ko) 2002-06-07 2006-02-02 엘지전자 주식회사 이동 통신 시스템에서의 송신 다이버시티 장치와 방법
AU2003237377A1 (en) 2002-06-07 2003-12-22 Nokia Corporation Apparatus and an associated method, by which to facilitate scheduling of data communications ina radio communications system
JP3751265B2 (ja) 2002-06-20 2006-03-01 松下電器産業株式会社 無線通信システムおよびスケジューリング方法
US7184713B2 (en) * 2002-06-20 2007-02-27 Qualcomm, Incorporated Rate control for multi-channel communication systems
US7095709B2 (en) 2002-06-24 2006-08-22 Qualcomm, Incorporated Diversity transmission modes for MIMO OFDM communication systems
US7613248B2 (en) 2002-06-24 2009-11-03 Qualcomm Incorporated Signal processing with channel eigenmode decomposition and channel inversion for MIMO systems
US7483408B2 (en) * 2002-06-26 2009-01-27 Nortel Networks Limited Soft handoff method for uplink wireless communications
US7551546B2 (en) * 2002-06-27 2009-06-23 Nortel Networks Limited Dual-mode shared OFDM methods/transmitters, receivers and systems
EP1376920B1 (de) * 2002-06-27 2005-10-26 Siemens Aktiengesellschaft Anordnung und verfahren zur Datenübertragung in einem mehrfacheingabe mehrfachausgabe Funkkommunikationssystem
DE60311464T2 (de) 2002-06-27 2007-08-30 Koninklijke Philips Electronics N.V. Messung von kanaleigenschaften in einem kommunikationssystem
US20040077379A1 (en) 2002-06-27 2004-04-22 Martin Smith Wireless transmitter, transceiver and method
US7043274B2 (en) 2002-06-28 2006-05-09 Interdigital Technology Corporation System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping
US7372911B1 (en) 2002-06-28 2008-05-13 Arraycomm, Llc Beam forming and transmit diversity in a multiple array radio communications system
KR100640470B1 (ko) 2002-06-29 2006-10-30 삼성전자주식회사 패킷 서비스 통신 시스템에서 전송 안테나 다이버시티방식을 사용하여 데이터를 전송 장치 및 방법
CN1219372C (zh) 2002-07-08 2005-09-14 华为技术有限公司 一种实现多媒体广播和多播业务的传输方法
KR100630112B1 (ko) 2002-07-09 2006-09-27 삼성전자주식회사 이동통신시스템의 적응형 채널 추정장치 및 방법
US7243150B2 (en) 2002-07-10 2007-07-10 Radwin Ltd. Reducing the access delay for transmitting processed data over transmission data
WO2004008671A1 (ja) 2002-07-16 2004-01-22 Matsushita Electric Industrial Co., Ltd. 通信方法およびそれを用いた送信装置と受信装置
US20040017785A1 (en) 2002-07-16 2004-01-29 Zelst Allert Van System for transporting multiple radio frequency signals of a multiple input, multiple output wireless communication system to/from a central processing base station
CN1669264A (zh) 2002-07-17 2005-09-14 皇家飞利浦电子股份有限公司 用于准同步系统的时间－频率交织mc－cdma
MXPA05000709A (es) 2002-07-17 2005-06-06 Soma Networks Inc Igualacion de dominio de frecuencia en sistemas de comunicaciones con mezclado.
WO2004010591A2 (en) 2002-07-18 2004-01-29 Interdigital Technology Corporation Orthogonal variable spreading factor (ovsf) code assignment
US7020446B2 (en) 2002-07-31 2006-03-28 Mitsubishi Electric Research Laboratories, Inc. Multiple antennas at transmitters and receivers to achieving higher diversity and data rates in MIMO systems
JP4022744B2 (ja) 2002-08-01 2007-12-19 日本電気株式会社 移動通信システム及びベストセル変更方法並びにそれに用いる基地局制御装置
WO2004014001A1 (en) 2002-08-02 2004-02-12 Nms Communications Methods and apparatus for network signal aggregation and bandwidth reduction
JP4047655B2 (ja) 2002-08-07 2008-02-13 京セラ株式会社 無線通信システム
US6788963B2 (en) 2002-08-08 2004-09-07 Flarion Technologies, Inc. Methods and apparatus for operating mobile nodes in multiple a states
US7418241B2 (en) 2002-08-09 2008-08-26 Qualcomm Incorporated System and techniques for enhancing the reliability of feedback in a wireless communications system
US7558193B2 (en) 2002-08-12 2009-07-07 Starent Networks Corporation Redundancy in voice and data communications systems
US7180627B2 (en) 2002-08-16 2007-02-20 Paxar Corporation Hand-held portable printer with RFID read/write capability
US7280622B2 (en) 2002-08-21 2007-10-09 Texas Instruments Incorporated Low-complexity hierarchical decoding for communications systems using multidimensional QAM signaling
WO2004019447A2 (en) 2002-08-21 2004-03-04 Zyray Wireless, Inc. Antenna array including virtual antenna elements
US7050405B2 (en) 2002-08-23 2006-05-23 Qualcomm Incorporated Method and system for a data transmission in a communication system
JP3999605B2 (ja) 2002-08-23 2007-10-31 株式会社エヌ・ティ・ティ・ドコモ 基地局、移動通信システム及び通信方法
DE10238796B4 (de) 2002-08-23 2006-09-14 Siemens Ag Verfahren zur Richtungsbestimmung der Position einer Mobilstation relativ zu einer Basisstation, Mobilfunksystem sowie Einrichtung zur Richtungsbestimmung
US6985498B2 (en) * 2002-08-26 2006-01-10 Flarion Technologies, Inc. Beacon signaling in a wireless system
US6940917B2 (en) * 2002-08-27 2005-09-06 Qualcomm, Incorporated Beam-steering and beam-forming for wideband MIMO/MISO systems
JP2004096142A (ja) 2002-08-29 2004-03-25 Hitachi Kokusai Electric Inc 地区エリアポーリング方式
KR100831987B1 (ko) 2002-08-30 2008-05-23 삼성전자주식회사 다중 사용자를 위한 다중 안테나를 이용한 송수신 장치
US7167916B2 (en) 2002-08-30 2007-01-23 Unisys Corporation Computer OS dispatcher operation with virtual switching queue and IP queues
US7519032B2 (en) 2002-09-04 2009-04-14 Koninklijke Philips Electronics N.V. Apparatus and method for providing QoS service schedule and bandwidth allocation to a wireless station
IL151644A (en) 2002-09-05 2008-11-26 Fazan Comm Llc Allocation of radio resources in a cdma 2000 cellular system
US7227854B2 (en) * 2002-09-06 2007-06-05 Samsung Electronics Co., Ltd. Apparatus and method for transmitting CQI information in a CDMA communication system employing an HSDPA scheme
US7260153B2 (en) 2002-09-09 2007-08-21 Mimopro Ltd. Multi input multi output wireless communication method and apparatus providing extended range and extended rate across imperfectly estimated channels
US6776165B2 (en) 2002-09-12 2004-08-17 The Regents Of The University Of California Magnetic navigation system for diagnosis, biopsy and drug delivery vehicles
WO2004028037A1 (ja) * 2002-09-20 2004-04-01 Mitsubishi Denki Kabushiki Kaisha 無線通信システム
US7209712B2 (en) 2002-09-23 2007-04-24 Qualcomm, Incorporated Mean square estimation of channel quality measure
GB0222555D0 (en) * 2002-09-28 2002-11-06 Koninkl Philips Electronics Nv Packet data transmission system
KR100933155B1 (ko) 2002-09-30 2009-12-21 삼성전자주식회사 주파수분할다중접속 이동통신시스템에서 가상 셀의 자원할당장치 및 방법
US7317680B2 (en) 2002-10-01 2008-01-08 Nortel Networks Limited Channel mapping for OFDM
US7412212B2 (en) 2002-10-07 2008-08-12 Nokia Corporation Communication system
JP4602641B2 (ja) 2002-10-18 2010-12-22 株式会社エヌ・ティ・ティ・ドコモ 信号伝送システム、信号伝送方法及び送信機
KR100461547B1 (ko) 2002-10-22 2004-12-16 한국전자통신연구원 디에스/시디엠에이 미모 안테나 시스템에서 보다 나은수신 다이버시티 이득을 얻기 위한 전송 시스템
US8208364B2 (en) 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US8218609B2 (en) 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US7002900B2 (en) * 2002-10-25 2006-02-21 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US8169944B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Random access for wireless multiple-access communication systems
US7986742B2 (en) 2002-10-25 2011-07-26 Qualcomm Incorporated Pilots for MIMO communication system
US7477618B2 (en) 2002-10-25 2009-01-13 Qualcomm Incorporated Method and apparatus for stealing power or code for data channel operations
EP1554831B1 (en) 2002-10-26 2013-05-22 Electronics and Telecommunications Research Institute Frequency hopping ofdma method using symbols of comb pattern
US7023880B2 (en) 2002-10-28 2006-04-04 Qualcomm Incorporated Re-formatting variable-rate vocoder frames for inter-system transmissions
US6928062B2 (en) 2002-10-29 2005-08-09 Qualcomm, Incorporated Uplink pilot and signaling transmission in wireless communication systems
US7042857B2 (en) 2002-10-29 2006-05-09 Qualcom, Incorporated Uplink pilot and signaling transmission in wireless communication systems
EP1568155A4 (en) 2002-10-29 2011-06-22 Nokia Corp LIGHT COMPLEXITY BEAMMER FOR MULTIPLE TRANSMITTERS AND RECEIVERS
CN100557982C (zh) 2002-10-30 2009-11-04 Nxp股份有限公司 用于接收编码块信号的接收器及其方法和处理器系统
US6963959B2 (en) 2002-10-31 2005-11-08 International Business Machines Corporation Storage system and method for reorganizing data to improve prefetch effectiveness and reduce seek distance
JP2004153676A (ja) 2002-10-31 2004-05-27 Mitsubishi Electric Corp 通信装置、送信機および受信機
JP2004158901A (ja) 2002-11-01 2004-06-03 Kddi Corp Ｏｆｄｍ及びｍｃ−ｃｄｍａを用いる送信装置、システム及び方法
US7680507B2 (en) 2002-11-04 2010-03-16 Alcatel-Lucent Usa Inc. Shared control and signaling channel for users subscribing to data services in a communication system
JP4095881B2 (ja) 2002-11-13 2008-06-04 株式会社 サンウェイ 道路路面計画の評価方法
DE10254384B4 (de) 2002-11-17 2005-11-17 Siemens Ag Bidirektionales Signalverarbeitungsverfahren für ein MIMO-System mit einer rangadaptiven Anpassung der Datenübertragungsrate
JP4084639B2 (ja) 2002-11-19 2008-04-30 株式会社エヌ・ティ・ティ・ドコモ 移動通信における受付制御方法、移動通信システム、移動局、受付制御装置及び受付制御用プログラム
US20040098505A1 (en) 2002-11-20 2004-05-20 Clemmensen Daniel G. Forwarding system with multiple logical sub-system functionality
JP3796212B2 (ja) 2002-11-20 2006-07-12 松下電器産業株式会社 基地局装置及び送信割り当て制御方法
KR100479864B1 (ko) 2002-11-26 2005-03-31 학교법인 중앙대학교 이동 통신 시스템에서의 하향링크 신호의 구성 방법과동기화 방법 및 그 장치 그리고 이를 이용한 셀 탐색 방법
MXPA05005932A (es) 2002-12-04 2005-08-18 Interdigital Tech Corp Deteccion de confiabilidad del indicador de calidad de canal (cqi) y aplicacion a control de potencia de bucle externo.
JP4350491B2 (ja) 2002-12-05 2009-10-21 パナソニック株式会社 無線通信システム、無線通信方法、及び無線通信装置
US8179833B2 (en) 2002-12-06 2012-05-15 Qualcomm Incorporated Hybrid TDM/OFDM/CDM reverse link transmission
EP1429487A3 (en) 2002-12-09 2005-07-20 Broadcom Corporation EDGE incremental redundancy memory structure and memory management
KR100507519B1 (ko) * 2002-12-13 2005-08-17 한국전자통신연구원 Ｏｆｄｍａ 기반 셀룰러 시스템의 하향링크를 위한 신호구성 방법 및 장치
US7508798B2 (en) 2002-12-16 2009-03-24 Nortel Networks Limited Virtual mimo communication system
KR100552669B1 (ko) 2002-12-26 2006-02-20 한국전자통신연구원 층적 공간-시간 구조의 검파기를 갖는 다중 입출력시스템에 적용되는 적응 변복조 장치 및 그 방법
US6904550B2 (en) 2002-12-30 2005-06-07 Motorola, Inc. Velocity enhancement for OFDM systems
KR100606008B1 (ko) 2003-01-04 2006-07-26 삼성전자주식회사 부호 분할 다중 접속 통신 시스템에서 역방향 데이터재전송 요청 송수신 장치 및 방법
JP4098096B2 (ja) 2003-01-06 2008-06-11 三菱電機株式会社 スペクトル拡散受信装置
US8400979B2 (en) 2003-01-07 2013-03-19 Qualcomm Incorporated Forward link handoff for wireless communication systems with OFDM forward link and CDMA reverse link
CN1302671C (zh) 2003-01-07 2007-02-28 华为技术有限公司 一种第三方为接收方接收多媒体短消息付费的方法
US7280467B2 (en) 2003-01-07 2007-10-09 Qualcomm Incorporated Pilot transmission schemes for wireless multi-carrier communication systems
KR100950652B1 (ko) 2003-01-08 2010-04-01 삼성전자주식회사 직교 주파수 분할 다중 전송 방식에서 순방향 링크의 채널 상태 추정 방법
JP4139230B2 (ja) 2003-01-15 2008-08-27 松下電器産業株式会社 送信装置及び送信方法
US7346018B2 (en) 2003-01-16 2008-03-18 Qualcomm, Incorporated Margin control in a data communication system
CN100417269C (zh) 2003-01-20 2008-09-03 中兴通讯股份有限公司 智能天线波束切换方法
KR100580244B1 (ko) 2003-01-23 2006-05-16 삼성전자주식회사 무선랜상의 핸드오프 방법
WO2004068721A2 (en) 2003-01-28 2004-08-12 Celletra Ltd. System and method for load distribution between base station sectors
JP4276009B2 (ja) 2003-02-06 2009-06-10 株式会社エヌ・ティ・ティ・ドコモ 移動局、基地局、無線伝送プログラム、及び無線伝送方法
JP4514463B2 (ja) 2003-02-12 2010-07-28 パナソニック株式会社 送信装置及び無線通信方法
JP3740471B2 (ja) 2003-02-13 2006-02-01 株式会社東芝 Ｏｆｄｍ受信装置、半導体集積回路及びｏｆｄｍ受信方法
WO2004073276A1 (en) 2003-02-14 2004-08-26 Docomo Communications Laboratories Europe Gmbh Two-dimensional channel estimation for multicarrier multiple input outpout communication systems
US7155236B2 (en) 2003-02-18 2006-12-26 Qualcomm Incorporated Scheduled and autonomous transmission and acknowledgement
US8391249B2 (en) 2003-02-18 2013-03-05 Qualcomm Incorporated Code division multiplexing commands on a code division multiplexed channel
RU2368106C2 (ru) 2003-02-18 2009-09-20 Квэлкомм Инкорпорейтед Планируемая и автономная передача и подтверждение приема
US7660282B2 (en) 2003-02-18 2010-02-09 Qualcomm Incorporated Congestion control in a wireless data network
US7813322B2 (en) 2003-02-19 2010-10-12 Qualcomm Incorporated Efficient automatic repeat request methods and apparatus
US7411895B2 (en) 2003-02-19 2008-08-12 Qualcomm Incorporated Controlled superposition coding in multi-user communication systems
US9544860B2 (en) 2003-02-24 2017-01-10 Qualcomm Incorporated Pilot signals for use in multi-sector cells
CA2516732A1 (en) 2003-02-24 2004-09-10 Autocell Laboratories, Inc. Wireless network architecture
KR100539230B1 (ko) 2003-02-26 2005-12-27 삼성전자주식회사 다양한 규격의 신호를 송수신 처리하는 물리층 장치, 이를구비한 무선 랜 시스템 및 그 무선 랜 방법
CA2516865A1 (en) 2003-02-27 2004-09-10 Interdigital Technology Corporation Method for implementing fast-dynamic channel allocation radio resource management procedures
JP2004260658A (ja) 2003-02-27 2004-09-16 Matsushita Electric Ind Co Ltd 無線ｌａｎ装置
US7486735B2 (en) 2003-02-28 2009-02-03 Nortel Networks Limited Sub-carrier allocation for OFDM
KR100547758B1 (ko) 2003-02-28 2006-01-31 삼성전자주식회사 초광대역 통신 시스템의 프리앰블 송수신 장치 및 방법
US6927728B2 (en) 2003-03-13 2005-08-09 Motorola, Inc. Method and apparatus for multi-antenna transmission
US7746816B2 (en) 2003-03-13 2010-06-29 Qualcomm Incorporated Method and system for a power control in a communication system
US20040179480A1 (en) 2003-03-13 2004-09-16 Attar Rashid Ahmed Method and system for estimating parameters of a link for data transmission in a communication system
US20040181569A1 (en) 2003-03-13 2004-09-16 Attar Rashid Ahmed Method and system for a data transmission in a communication system
US7885228B2 (en) 2003-03-20 2011-02-08 Qualcomm Incorporated Transmission mode selection for data transmission in a multi-channel communication system
US7130580B2 (en) 2003-03-20 2006-10-31 Lucent Technologies Inc. Method of compensating for correlation between multiple antennas
US7016319B2 (en) 2003-03-24 2006-03-21 Motorola, Inc. Method and apparatus for reducing co-channel interference in a communication system
SE527445C2 (sv) 2003-03-25 2006-03-07 Telia Ab Lägesanpassat skyddsintervall för OFDM-kommunikation
US20040192386A1 (en) 2003-03-26 2004-09-30 Naveen Aerrabotu Method and apparatus for multiple subscriber identities in a mobile communication device
JP4181906B2 (ja) 2003-03-26 2008-11-19 富士通株式会社 送信機及び受信機
JP4218387B2 (ja) 2003-03-26 2009-02-04 日本電気株式会社 無線通信システム、基地局及びそれらに用いる無線リンク品質情報補正方法並びにそのプログラム
JP4162522B2 (ja) 2003-03-26 2008-10-08 三洋電機株式会社 無線基地装置、送信指向性制御方法、および送信指向性制御プログラム
CN100558095C (zh) 2003-03-27 2009-11-04 株式会社Ntt都科摩 估计多个信道的设备和方法
US7233634B1 (en) 2003-03-27 2007-06-19 Nortel Networks Limited Maximum likelihood decoding
GB2400280B (en) 2003-04-02 2005-06-01 Matsushita Electric Ind Co Ltd Dynamic resource allocation in packet data transfer
US7085574B2 (en) 2003-04-15 2006-08-01 Qualcomm, Incorporated Grant channel assignment
JP4077355B2 (ja) 2003-04-16 2008-04-16 三菱電機株式会社 通信装置および通信方法
KR20050119143A (ko) 2003-04-21 2005-12-20 미쓰비시덴키 가부시키가이샤 무선통신장치, 송신장치, 수신장치 및 무선통신시스템
EP1618748B1 (en) 2003-04-23 2016-04-13 QUALCOMM Incorporated Methods and apparatus of enhancing performance in wireless communication systems
US7640373B2 (en) 2003-04-25 2009-12-29 Motorola, Inc. Method and apparatus for channel quality feedback within a communication system
KR100942645B1 (ko) 2003-04-29 2010-02-17 엘지전자 주식회사 이동통신 시스템에서의 신호전송 방법 및 장치
US6824416B2 (en) 2003-04-30 2004-11-30 Agilent Technologies, Inc. Mounting arrangement for plug-in modules
US7013143B2 (en) 2003-04-30 2006-03-14 Motorola, Inc. HARQ ACK/NAK coding for a communication device during soft handoff
US20040219919A1 (en) 2003-04-30 2004-11-04 Nicholas Whinnett Management of uplink scheduling modes in a wireless communication system
US6993342B2 (en) 2003-05-07 2006-01-31 Motorola, Inc. Buffer occupancy used in uplink scheduling for a communication device
US6882855B2 (en) 2003-05-09 2005-04-19 Motorola, Inc. Method and apparatus for CDMA soft handoff for dispatch group members
US7254158B2 (en) 2003-05-12 2007-08-07 Qualcomm Incorporated Soft handoff with interference cancellation in a wireless frequency hopping communication system
US7177297B2 (en) 2003-05-12 2007-02-13 Qualcomm Incorporated Fast frequency hopping with a code division multiplexed pilot in an OFDMA system
US6950319B2 (en) 2003-05-13 2005-09-27 Delta Electronics, Inc. AC/DC flyback converter
US7545867B1 (en) 2003-05-14 2009-06-09 Marvell International, Ltd. Adaptive channel bandwidth selection for MIMO wireless systems
JP2006526353A (ja) 2003-05-15 2006-11-16 エルジー エレクトロニクス インコーポレイティド 無線通信のためのチャネル化コードの割り当て方法及び装置
KR100526542B1 (ko) 2003-05-15 2005-11-08 삼성전자주식회사 이동 통신 시스템에서 다중안테나를 사용하는송신다이버시티 방식을 사용하여 데이터를 송수신하는장치 및 방법
US7181196B2 (en) 2003-05-15 2007-02-20 Lucent Technologies Inc. Performing authentication in a communications system
US20040228313A1 (en) 2003-05-16 2004-11-18 Fang-Chen Cheng Method of mapping data for uplink transmission in communication systems
WO2004105272A1 (ja) 2003-05-20 2004-12-02 Fujitsu Limited 移動通信システムにおけるアプリケーションハンドオーバ方法並びに同移動通信システムに使用される移動管理ノード及び移動ノード
EP1627511B1 (en) 2003-05-28 2008-02-27 Telefonaktiebolaget LM Ericsson (publ) Method and architecture for wireless communication networks using cooperative relaying
US7454510B2 (en) 2003-05-29 2008-11-18 Microsoft Corporation Controlled relay of media streams across network perimeters
US7366137B2 (en) 2003-05-31 2008-04-29 Qualcomm Incorporated Signal-to-noise estimation in wireless communication devices with receive diversity
US8018902B2 (en) * 2003-06-06 2011-09-13 Telefonaktiebolaget L M Ericsson (Publ) Methods and apparatus for channel quality indicator determination
US7079870B2 (en) 2003-06-09 2006-07-18 Ipr Licensing, Inc. Compensation techniques for group delay effects in transmit beamforming radio communication
KR100547734B1 (ko) 2003-06-13 2006-01-31 삼성전자주식회사 직교 주파수 분할 다중 방식을 사용하는 이동 통신시스템에서 매체 접속 제어 계층의 동작 상태 제어 방법
WO2004114549A1 (en) 2003-06-13 2004-12-29 Nokia Corporation Enhanced data only code division multiple access (cdma) system
US7236747B1 (en) 2003-06-18 2007-06-26 Samsung Electronics Co., Ltd. (SAIT) Increasing OFDM transmit power via reduction in pilot tone
WO2004112292A1 (en) 2003-06-18 2004-12-23 Samsung Electronics Co., Ltd. Apparatus and method for transmitting and receiving a pilot pattern for identification of a base station in an ofdm communication system
CN1643867B (zh) 2003-06-22 2010-06-23 株式会社Ntt都科摩 用于估计信道的设备和方法
KR20050000709A (ko) 2003-06-24 2005-01-06 삼성전자주식회사 다중 접속 방식을 사용하는 통신 시스템의 데이터 송수신장치 및 방법
US7433661B2 (en) 2003-06-25 2008-10-07 Lucent Technologies Inc. Method for improved performance and reduced bandwidth channel state information feedback in communication systems
NZ526669A (en) 2003-06-25 2006-03-31 Ind Res Ltd Narrowband interference suppression for OFDM systems
US7394865B2 (en) 2003-06-25 2008-07-01 Nokia Corporation Signal constellations for multi-carrier systems
DE60311782T2 (de) * 2003-06-26 2007-11-08 Mitsubishi Denki K.K. Verfahren zum Decodieren von in einem Telekommunikationssysstem gesendeten Symbolen
JP3746280B2 (ja) 2003-06-27 2006-02-15 株式会社東芝 通信方法、通信システム及び通信装置
US20040267778A1 (en) 2003-06-27 2004-12-30 Microsoft Corporation Media foundation topology application programming interface
CN100473213C (zh) 2003-06-30 2009-03-25 日本电气株式会社 无线通信系统和发射模式选择方法
US20050009476A1 (en) 2003-07-07 2005-01-13 Shiquan Wu Virtual MIMO transmitters, receivers, systems and methods
US7522919B2 (en) 2003-07-14 2009-04-21 Telefonaktiebolaget Lm Ericsson (Publ) Enhancements to periodic silences in wireless communication systems
KR100987286B1 (ko) 2003-07-31 2010-10-12 삼성전자주식회사 무선 통신 시스템에서 다중접속 방법 및 그 제어 시스템
US8140980B2 (en) * 2003-08-05 2012-03-20 Verizon Business Global Llc Method and system for providing conferencing services
US7126928B2 (en) 2003-08-05 2006-10-24 Qualcomm Incorporated Grant, acknowledgement, and rate control active sets
US7315527B2 (en) 2003-08-05 2008-01-01 Qualcomm Incorporated Extended acknowledgement and rate control channel
CA2533322C (en) 2003-08-05 2012-05-01 Telecom Italia S.P.A. Method for providing extra-traffic paths with connection protection in a communication network, related network and computer program product therefor
US7969857B2 (en) * 2003-08-07 2011-06-28 Nortel Networks Limited OFDM system and method employing OFDM symbols with known or information-containing prefixes
KR20050015731A (ko) * 2003-08-07 2005-02-21 삼성전자주식회사 이중 시공간 송신 다이버시티 시스템에서 최소 신호대잡음비를 이용한 셔플링 패턴 결정 방법 및 장치
US7460494B2 (en) 2003-08-08 2008-12-02 Intel Corporation Adaptive signaling in multiple antenna systems
EP1643669B1 (en) 2003-08-12 2018-02-21 Godo Kaisha IP Bridge 1 Radio communication apparatus and pilot symbol transmission method
WO2005020490A1 (en) 2003-08-13 2005-03-03 Flarion Technologies, Inc. Methods and apparatus of power control in wireless communication systems
ATE332061T1 (de) 2003-08-14 2006-07-15 Matsushita Electric Ind Co Ltd Synchronisation von basisstationen während soft- handover
RU2235429C1 (ru) 2003-08-15 2004-08-27 Федеральное государственное унитарное предприятие "Воронежский научно-исследовательский институт связи" Способ частотно-временной синхронизации системы связи и устройство для его осуществления
US7257167B2 (en) 2003-08-19 2007-08-14 The University Of Hong Kong System and method for multi-access MIMO channels with feedback capacity constraint
US8660567B2 (en) 2003-08-20 2014-02-25 Panasonic Corporation Radio communication apparatus and subcarrier assignment method
US6925145B2 (en) * 2003-08-22 2005-08-02 General Electric Company High speed digital radiographic inspection of piping
US7221680B2 (en) 2003-09-02 2007-05-22 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
JP4194091B2 (ja) 2003-09-02 2008-12-10 ソニー・エリクソン・モバイルコミュニケーションズ株式会社 無線通信システムおよび無線通信装置
US20050063298A1 (en) 2003-09-02 2005-03-24 Qualcomm Incorporated Synchronization in a broadcast OFDM system using time division multiplexed pilots
US20050047517A1 (en) * 2003-09-03 2005-03-03 Georgios Giannakis B. Adaptive modulation for multi-antenna transmissions with partial channel knowledge
US7400856B2 (en) 2003-09-03 2008-07-15 Motorola, Inc. Method and apparatus for relay facilitated communications
US7724827B2 (en) * 2003-09-07 2010-05-25 Microsoft Corporation Multi-layer run level encoding and decoding
US8908496B2 (en) * 2003-09-09 2014-12-09 Qualcomm Incorporated Incremental redundancy transmission in a MIMO communication system
US7356073B2 (en) 2003-09-10 2008-04-08 Nokia Corporation Method and apparatus providing an advanced MIMO receiver that includes a signal-plus-residual-interference (SPRI) detector
US6917821B2 (en) 2003-09-23 2005-07-12 Qualcomm, Incorporated Successive interference cancellation receiver processing with selection diversity
US20050068921A1 (en) 2003-09-29 2005-03-31 Jung-Tao Liu Multiplexing of physical channels on the uplink
EP1573936B1 (en) 2003-09-30 2006-07-26 NTT DoCoMo, Inc. Apparatus and method for cyclic delay diversity
KR100950668B1 (ko) 2003-09-30 2010-04-02 삼성전자주식회사 직교 주파수 분할 다중 접속 방식을 사용하는 통신 시스템에서 업링크 파일럿 신호 송수신 장치 및 방법
EP1668835A1 (en) 2003-09-30 2006-06-14 Telefonaktiebolaget LM Ericsson (publ) Method and apparatus for congestion control in high speed wireless packet data networks
JP2005110130A (ja) 2003-10-01 2005-04-21 Samsung Electronics Co Ltd 共通チャネル伝送システム、共通チャネル伝送方法及び通信プログラム
US7230942B2 (en) 2003-10-03 2007-06-12 Qualcomm, Incorporated Method of downlink resource allocation in a sectorized environment
EP1521414B1 (en) 2003-10-03 2008-10-29 Kabushiki Kaisha Toshiba Method and apparatus for sphere decoding
US7317917B2 (en) 2003-10-14 2008-01-08 Via Telecom, Inc. Mobile station connection management utilizing suitable parameter information
US7039370B2 (en) * 2003-10-16 2006-05-02 Flarion Technologies, Inc. Methods and apparatus of providing transmit and/or receive diversity with multiple antennas in wireless communication systems
US7242722B2 (en) 2003-10-17 2007-07-10 Motorola, Inc. Method and apparatus for transmission and reception within an OFDM communication system
US7120395B2 (en) 2003-10-20 2006-10-10 Nortel Networks Limited MIMO communications
EP1526674B1 (en) 2003-10-21 2007-08-01 Alcatel Lucent Method for subcarrier allocation and for modulation scheme selection in a wireless multicarrier transmission system
US7508748B2 (en) 2003-10-24 2009-03-24 Qualcomm Incorporated Rate selection for a multi-carrier MIMO system
KR20050040988A (ko) 2003-10-29 2005-05-04 삼성전자주식회사 주파수도약 직교 주파수 분할 다중화 기반 셀룰러시스템을 위한 통신방법
KR100957415B1 (ko) 2003-10-31 2010-05-11 삼성전자주식회사 직교 주파수 분할 다중 방식을 사용하는 통신 시스템에서 기지국 구분을 위한 파일럿 신호 송수신 장치 및 방법
KR101023330B1 (ko) 2003-11-05 2011-03-18 한국과학기술원 무선 통신 시스템에서 서비스 품질을 보장하기 위한 복합자동 재전송 요구 방법
US7664533B2 (en) 2003-11-10 2010-02-16 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for a multi-beam antenna system
KR100981554B1 (ko) * 2003-11-13 2010-09-10 한국과학기술원 다중 송수신 안테나들을 구비하는 이동통신시스템에서,송신 안테나들을 그룹핑하여 신호를 전송하는 방법
US7356000B2 (en) 2003-11-21 2008-04-08 Motorola, Inc. Method and apparatus for reducing call setup delay
US7298805B2 (en) 2003-11-21 2007-11-20 Qualcomm Incorporated Multi-antenna transmission for spatial division multiple access
EP1533950A1 (en) 2003-11-21 2005-05-25 Sony International (Europe) GmbH Method for connecting a mobile terminal to a wireless communication system, wireless communication system and mobile terminal for a wireless communication system
JP2005167502A (ja) 2003-12-01 2005-06-23 Ntt Docomo Inc 無線通信システム、送信無線局の制御装置及び受信無線局の制御装置、並びにサブキャリア選択方法
US9473269B2 (en) 2003-12-01 2016-10-18 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
WO2005055543A1 (en) * 2003-12-03 2005-06-16 Australian Telecommunications Cooperative Research Centre Channel estimation for ofdm systems
KR20050053907A (ko) 2003-12-03 2005-06-10 삼성전자주식회사 직교 주파수 분할 다중 접속 방식을 사용하는 이동 통신시스템에서 서브 캐리어 할당 방법
TWI232040B (en) 2003-12-03 2005-05-01 Chung Shan Inst Of Science CDMA transmitting and receiving apparatus with multiply applied interface functions and a method thereof
US7145940B2 (en) 2003-12-05 2006-12-05 Qualcomm Incorporated Pilot transmission schemes for a multi-antenna system
WO2005055484A1 (ja) * 2003-12-05 2005-06-16 Nippon Telegraph And Telephone Corporation 無線通信装置、無線通信方法、及び無線通信システム
EP1542488A1 (en) 2003-12-12 2005-06-15 Telefonaktiebolaget LM Ericsson (publ) Method and apparatus for allocating a pilot signal adapted to the channel characteristics
KR100856227B1 (ko) 2003-12-15 2008-09-03 삼성전자주식회사 이동통신시스템에서의 송/수신장치 및 방법
US8204149B2 (en) 2003-12-17 2012-06-19 Qualcomm Incorporated Spatial spreading in a multi-antenna communication system
US7302009B2 (en) 2003-12-17 2007-11-27 Qualcomm Incorporated Broadcast transmission with spatial spreading in a multi-antenna communication system
KR100560386B1 (ko) 2003-12-17 2006-03-13 한국전자통신연구원 무선 통신 시스템의 상향 링크에서 코히어런트 검출을위한 직교주파수 분할 다중 접속 방식의 송수신 장치 및그 방법
EP1545082A3 (en) 2003-12-17 2005-08-03 Kabushiki Kaisha Toshiba Signal decoding methods and apparatus
KR100507541B1 (ko) 2003-12-19 2005-08-09 삼성전자주식회사 직교주파수분할다중접속 시스템에서의 데이터 및 파일롯할당 방법 과 그를 이용한 송신 방법 및 그 장치, 수신방법과 그 장치
KR20050063826A (ko) 2003-12-19 2005-06-28 엘지전자 주식회사 무선통신 시스템의 무선자원 할당방법
JP4301931B2 (ja) 2003-12-22 2009-07-22 株式会社三共 遊技機
ATE491269T1 (de) 2003-12-22 2010-12-15 Ericsson Telefon Ab L M Verfahren zur bestimmung von sendegewichten
US7181170B2 (en) * 2003-12-22 2007-02-20 Motorola Inc. Apparatus and method for adaptive broadcast transmission
KR100943572B1 (ko) 2003-12-23 2010-02-24 삼성전자주식회사 직교 주파수 분할 다중 접속 시스템에서 주파수재사용율을 고려한 적응적 부채널 할당 장치 및 방법
KR100981580B1 (ko) 2003-12-23 2010-09-10 삼성전자주식회사 8 개 이하의 송신 안테나를 사용하는 차등 시공간 블록 부호 송수신 장치
US7352819B2 (en) 2003-12-24 2008-04-01 Intel Corporation Multiantenna communications apparatus, methods, and system
JP2005197772A (ja) 2003-12-26 2005-07-21 Toshiba Corp アダプティブアレイアンテナ装置
JP4425925B2 (ja) 2003-12-27 2010-03-03 韓國電子通信研究院 固有ビーム形成技術を使用するｍｉｍｏ−ｏｆｄｍシステム
US7489621B2 (en) 2003-12-30 2009-02-10 Alexander A Maltsev Adaptive puncturing technique for multicarrier systems
WO2005069538A1 (en) 2004-01-07 2005-07-28 Deltel, Inc./Pbnext Method and apparatus for telecommunication system
CN1642051A (zh) 2004-01-08 2005-07-20 电子科技大学 一种获取最优导引符号功率的方法
WO2005065062A2 (en) 2004-01-09 2005-07-21 Lg Electronics Inc. Packet transmission method
US7289585B2 (en) 2004-01-12 2007-10-30 Intel Corporation Multicarrier receivers and methods for separating transmitted signals in a multiple antenna system
JP4167183B2 (ja) 2004-01-14 2008-10-15 株式会社国際電気通信基礎技術研究所 アレーアンテナの制御装置
US20050159162A1 (en) 2004-01-20 2005-07-21 Samsung Electronics Co., Ltd. Method for transmitting data in mobile communication network
TR200504827T2 (tr) 2004-01-20 2007-01-22 Qualcomm Incorporated Eşzamanlı yayın/çoğa gönderim iletişimi.
JP2007518346A (ja) * 2004-01-20 2007-07-05 エルジー エレクトロニクス インコーポレイティド Ｍｉｍｏシステムにおける信号送受信方法
US8611283B2 (en) 2004-01-28 2013-12-17 Qualcomm Incorporated Method and apparatus of using a single channel to provide acknowledgement and assignment messages
WO2005081439A1 (en) 2004-02-13 2005-09-01 Neocific, Inc. Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback
DE102004005401B4 (de) * 2004-02-03 2006-04-06 Jungheinrich Aktiengesellschaft Verfahren zum Einstellen des Steuerstroms von stromgesteuerten Hydraulikventilen
JP4230933B2 (ja) 2004-02-03 2009-02-25 株式会社エヌ・ティ・ティ・ドコモ 受信機、送信機及び無線通信システム並びに電力配分方法
US8144735B2 (en) 2004-02-10 2012-03-27 Qualcomm Incorporated Transmission of signaling information for broadcast and multicast services
GB2412541B (en) 2004-02-11 2006-08-16 Samsung Electronics Co Ltd Method of operating TDD/virtual FDD hierarchical cellular telecommunication system
KR100827105B1 (ko) 2004-02-13 2008-05-02 삼성전자주식회사 광대역 무선 통신 시스템에서 고속 레인징을 통한 빠른핸드오버 수행 방법 및 장치
WO2005081437A1 (en) 2004-02-17 2005-09-01 Huawei Technologies Co., Ltd. Multiplexing scheme in a communication system
US7564906B2 (en) 2004-02-17 2009-07-21 Nokia Siemens Networks Oy OFDM transceiver structure with time-domain scrambling
US8169889B2 (en) * 2004-02-18 2012-05-01 Qualcomm Incorporated Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system
JP2005236678A (ja) 2004-02-19 2005-09-02 Toyota Motor Corp 移動体用受信装置
EP1721475A1 (en) 2004-02-27 2006-11-15 Nokia Corporation Constrained optimization based mimo lmmse-sic receiver for cdma downlink
US7421041B2 (en) 2004-03-01 2008-09-02 Qualcomm, Incorporated Iterative channel and interference estimation and decoding
US20050195886A1 (en) 2004-03-02 2005-09-08 Nokia Corporation CPICH processing for SINR estimation in W-CDMA system
US7290195B2 (en) 2004-03-05 2007-10-30 Microsoft Corporation Adaptive acknowledgment delay
KR101084113B1 (ko) 2004-03-05 2011-11-17 엘지전자 주식회사 이동통신의 핸드오버에 적용되는 서비스 정보 전달 방법
CN103036844B (zh) 2004-03-15 2017-11-24 苹果公司 用于具有四根发射天线的ofdm系统的导频设计
US20050201296A1 (en) 2004-03-15 2005-09-15 Telefonaktiebolaget Lm Ericsson (Pu Reduced channel quality feedback
US7706350B2 (en) 2004-03-19 2010-04-27 Qualcomm Incorporated Methods and apparatus for flexible spectrum allocation in communication systems
US20050207367A1 (en) 2004-03-22 2005-09-22 Onggosanusi Eko N Method for channel quality indicator computation and feedback in a multi-carrier communications system
US7907898B2 (en) 2004-03-26 2011-03-15 Qualcomm Incorporated Asynchronous inter-piconet routing
JP2005284751A (ja) 2004-03-30 2005-10-13 Fujitsu Ltd 論理検証装置、論理検証方法および論理検証プログラム
US7848442B2 (en) 2004-04-02 2010-12-07 Lg Electronics Inc. Signal processing apparatus and method in multi-input/multi-output communications systems
JP4288368B2 (ja) 2004-04-09 2009-07-01 Ｏｋｉセミコンダクタ株式会社 受信制御方法および無線ｌａｎ装置
US7684507B2 (en) 2004-04-13 2010-03-23 Intel Corporation Method and apparatus to select coding mode
US7047006B2 (en) 2004-04-28 2006-05-16 Motorola, Inc. Method and apparatus for transmission and reception of narrowband signals within a wideband communication system
GB0409704D0 (en) 2004-04-30 2004-06-02 Nokia Corp A method for verifying a first identity and a second identity of an entity
CN1691539A (zh) 2004-04-30 2005-11-02 皇家飞利浦电子股份有限公司 用于多入多出无线通信系统的通用多入多出－联合检测方法和装置
KR100594084B1 (ko) 2004-04-30 2006-06-30 삼성전자주식회사 직교 주파수 분할 다중 수신기의 채널 추정 방법 및 채널추정기
CA2506267A1 (en) 2004-05-04 2005-11-04 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Industry Through The Communications Research Centre Multi-subband frequency hopping communication system and method
US20050250544A1 (en) 2004-05-07 2005-11-10 Stephen Grant Base station, mobile terminal device and method for implementing a selective-per-antenna-rate-control (S-PARC) technique in a wireless communications network
US7411898B2 (en) 2004-05-10 2008-08-12 Infineon Technologies Ag Preamble generator for a multiband OFDM transceiver
JP4447372B2 (ja) 2004-05-13 2010-04-07 株式会社エヌ・ティ・ティ・ドコモ 無線通信システム、無線通信装置、無線受信装置、無線通信方法及びチャネル推定方法
KR20050109789A (ko) 2004-05-17 2005-11-22 삼성전자주식회사 공간분할다중화/다중입력다중출력 시스템에서의 빔포밍 방법
US7157351B2 (en) * 2004-05-20 2007-01-02 Taiwan Semiconductor Manufacturing Co., Ltd. Ozone vapor clean method
US20050259005A1 (en) 2004-05-20 2005-11-24 Interdigital Technology Corporation Beam forming matrix-fed circular array system
US8000377B2 (en) 2004-05-24 2011-08-16 General Dynamics C4 Systems, Inc. System and method for variable rate multiple access short message communications
JP4398791B2 (ja) 2004-05-25 2010-01-13 株式会社エヌ・ティ・ティ・ドコモ 送信機および送信制御方法
US7551564B2 (en) 2004-05-28 2009-06-23 Intel Corporation Flow control method and apparatus for single packet arrival on a bidirectional ring interconnect
KR100754794B1 (ko) 2004-05-29 2007-09-03 삼성전자주식회사 이동통신시스템에서 셀 식별 코드 송수신 장치 및 방법
US7437164B2 (en) 2004-06-08 2008-10-14 Qualcomm Incorporated Soft handoff for reverse link in a wireless communication system with frequency reuse
US8619907B2 (en) 2004-06-10 2013-12-31 Agere Systems, LLC Method and apparatus for preamble training in a multiple antenna communication system
US7769107B2 (en) 2004-06-10 2010-08-03 Intel Corporation Semi-blind analog beamforming for multiple-antenna systems
US7773950B2 (en) 2004-06-16 2010-08-10 Telefonaktiebolaget Lm Ericsson (Publ) Benign interference suppression for received signal quality estimation
US7724777B2 (en) 2004-06-18 2010-05-25 Qualcomm Incorporated Quasi-orthogonal multiplexing for a multi-carrier communication system
US8027372B2 (en) 2004-06-18 2011-09-27 Qualcomm Incorporated Signal acquisition in a wireless communication system
US7599327B2 (en) 2004-06-24 2009-10-06 Motorola, Inc. Method and apparatus for accessing a wireless communication system
US7299048B2 (en) 2004-06-25 2007-11-20 Samsung Electronics Co., Ltd. System and method for performing soft handover in broadband wireless access communication system
KR101053610B1 (ko) 2004-06-25 2011-08-03 엘지전자 주식회사 Ｏｆｄｍ／ｏｆｄｍａ 시스템의 무선자원 할당 방법
US8000268B2 (en) 2004-06-30 2011-08-16 Motorola Mobility, Inc. Frequency-hopped IFDMA communication system
CN102655446B (zh) 2004-06-30 2016-12-14 亚马逊科技公司 用于控制信号传输的装置和方法、以及通信方法
ATE514069T1 (de) 2004-07-02 2011-07-15 Vibration Res Corp System und verfahren zur gleichzeitigen steuerung von spektrum und kurtosis einer nicht periodischen schwingung
US8588326B2 (en) 2004-07-07 2013-11-19 Apple Inc. System and method for mapping symbols for MIMO transmission
JP4181093B2 (ja) * 2004-07-16 2008-11-12 株式会社東芝 無線通信システム
US8477710B2 (en) * 2004-07-21 2013-07-02 Qualcomm Incorporated Method of providing a gap indication during a sticky assignment
US7676007B1 (en) * 2004-07-21 2010-03-09 Jihoon Choi System and method for interpolation based transmit beamforming for MIMO-OFDM with partial feedback
US7567621B2 (en) 2004-07-21 2009-07-28 Qualcomm Incorporated Capacity based rank prediction for MIMO design
US10355825B2 (en) * 2004-07-21 2019-07-16 Qualcomm Incorporated Shared signaling channel for a communication system
US9137822B2 (en) * 2004-07-21 2015-09-15 Qualcomm Incorporated Efficient signaling over access channel
US9148256B2 (en) 2004-07-21 2015-09-29 Qualcomm Incorporated Performance based rank prediction for MIMO design
US7257406B2 (en) 2004-07-23 2007-08-14 Qualcomm, Incorporated Restrictive reuse set management
US7864659B2 (en) 2004-08-02 2011-01-04 Interdigital Technology Corporation Quality control scheme for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems
TW200620924A (en) 2004-08-03 2006-06-16 Agency Science Tech & Res Method for transmitting a digital data stream, transmitter, method for receiving a digital data stream and receiver
JP2006050326A (ja) * 2004-08-05 2006-02-16 Toshiba Corp 情報処理装置および同装置のシーンチェンジ検出方法
US7428426B2 (en) 2004-08-06 2008-09-23 Qualcomm, Inc. Method and apparatus for controlling transmit power in a wireless communications device
US7499393B2 (en) 2004-08-11 2009-03-03 Interdigital Technology Corporation Per stream rate control (PSRC) for improving system efficiency in OFDM-MIMO communication systems
WO2006031019A1 (en) 2004-08-12 2006-03-23 Lg Electronics Inc. Reception in dedicated service of wireless communication system
US20060218459A1 (en) 2004-08-13 2006-09-28 David Hedberg Coding systems and methods
US20060039332A1 (en) * 2004-08-17 2006-02-23 Kotzin Michael D Mechanism for hand off using subscriber detection of synchronized access point beacon transmissions
JP4440971B2 (ja) * 2004-08-17 2010-03-24 サムスン エレクトロニクス カンパニー リミテッド 性能向上のための時空間周波数ブロック符号化装置及び方法
US7899497B2 (en) 2004-08-18 2011-03-01 Ruckus Wireless, Inc. System and method for transmission parameter control for an antenna apparatus with selectable elements
US7336727B2 (en) 2004-08-19 2008-02-26 Nokia Corporation Generalized m-rank beamformers for MIMO systems using successive quantization
US20060039344A1 (en) * 2004-08-20 2006-02-23 Lucent Technologies, Inc. Multiplexing scheme for unicast and broadcast/multicast traffic
US7852746B2 (en) 2004-08-25 2010-12-14 Qualcomm Incorporated Transmission of signaling in an OFDM-based system
KR100856249B1 (ko) 2004-08-26 2008-09-03 삼성전자주식회사 무선 통신 시스템에서 초기 동작 모드 검출 방법
US7894548B2 (en) 2004-09-03 2011-02-22 Qualcomm Incorporated Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system
US7978778B2 (en) * 2004-09-03 2011-07-12 Qualcomm, Incorporated Receiver structures for spatial spreading with space-time or space-frequency transmit diversity
US7362822B2 (en) 2004-09-08 2008-04-22 Intel Corporation Recursive reduction of channel state feedback
BRPI0515153A (pt) 2004-09-10 2008-07-08 Matsushita Electric Ind Co Ltd aparelho de comunicação sem fio e método de comunicação sem fio
US7613423B2 (en) 2004-09-10 2009-11-03 Samsung Electronics Co., Ltd. Method of creating active multipaths for mimo wireless systems
GB0420164D0 (en) 2004-09-10 2004-10-13 Nokia Corp A scheduler
US7852814B2 (en) 2004-09-17 2010-12-14 Panasonic Corporation Transmission control frame generation device and transmission control device
KR100715910B1 (ko) 2004-09-20 2007-05-08 삼성전자주식회사 다중 접속 방식을 사용하는 이동 통신 시스템의 셀 탐색장치 및 방법
WO2006034577A1 (en) 2004-09-30 2006-04-06 Nortel Networks Limited Channel sounding in ofdma system
US8325863B2 (en) 2004-10-12 2012-12-04 Qualcomm Incorporated Data detection and decoding with considerations for channel estimation errors due to guard subbands
US7969858B2 (en) 2004-10-14 2011-06-28 Qualcomm Incorporated Wireless terminal methods and apparatus for use in wireless communications systems supporting different size frequency bands
KR100648472B1 (ko) 2004-10-19 2006-11-28 삼성전자주식회사 다중 송신 다중 수신 안테나 통신 시스템에서 적응 변조및 부호 성능을 최적화하기 위한 송·수신 장치 및 방법
US7636328B2 (en) 2004-10-20 2009-12-22 Qualcomm Incorporated Efficient transmission of signaling using channel constraints
US7616955B2 (en) 2004-11-12 2009-11-10 Broadcom Corporation Method and system for bits and coding assignment utilizing Eigen beamforming with fixed rates for closed loop WLAN
US20060089104A1 (en) 2004-10-27 2006-04-27 Nokia Corporation Method for improving an HS-DSCH transport format allocation
KR101023366B1 (ko) 2004-10-27 2011-03-18 삼성전자주식회사 빔 포밍 방식을 사용하는 다중 입력 다중 출력 무선 통신시스템에서 신호 송수신 장치 및 방법
GB2419788B (en) 2004-11-01 2007-10-31 Toshiba Res Europ Ltd Interleaver and de-interleaver systems
US7139328B2 (en) 2004-11-04 2006-11-21 Motorola, Inc. Method and apparatus for closed loop data transmission
US20060093061A1 (en) 2004-11-04 2006-05-04 Samsung Electronics Co., Ltd. Apparatus and method for transmitting and receiving data using space-time block coding
US7627051B2 (en) 2004-11-08 2009-12-01 Samsung Electronics Co., Ltd. Method of maximizing MIMO system performance by joint optimization of diversity and spatial multiplexing
PL1829262T3 (pl) 2004-11-16 2018-08-31 Qualcomm Incorporated Kontrola szybkości w zamkniętej pętli dla systemu komunikacji MIMO
US20060104333A1 (en) 2004-11-18 2006-05-18 Motorola, Inc. Acknowledgment for a time division channel
US20060111054A1 (en) 2004-11-22 2006-05-25 Interdigital Technology Corporation Method and system for selecting transmit antennas to reduce antenna correlation
US7512096B2 (en) 2004-11-24 2009-03-31 Alcatel-Lucent Usa Inc. Communicating data between an access point and multiple wireless devices over a link
EP1816772A1 (en) 2004-11-30 2007-08-08 Matsusita Electric Industrial Co., Ltd. Transmission control frame generation device, transmission control frame processing device, transmission control frame generation method, and transmission control frame processing method
US7593473B2 (en) 2004-12-01 2009-09-22 Bae Systems Information And Electronic Systems Integration Inc. Tree structured multicarrier multiple access systems
US7822128B2 (en) 2004-12-03 2010-10-26 Intel Corporation Multiple antenna multicarrier transmitter and method for adaptive beamforming with transmit-power normalization
WO2006062356A1 (en) * 2004-12-08 2006-06-15 Electronics And Telecommunications Research Institute Transmitter, receiver and method for controlling multiple input multiple output system
US8238923B2 (en) 2004-12-22 2012-08-07 Qualcomm Incorporated Method of using shared resources in a communication system
US8179876B2 (en) 2004-12-22 2012-05-15 Qualcomm Incorporated Multiple modulation technique for use in a communication system
US7940710B2 (en) 2004-12-22 2011-05-10 Qualcomm Incorporated Methods and apparatus for efficient paging in a wireless communication system
KR100939131B1 (ko) 2004-12-22 2010-01-28 콸콤 인코포레이티드 다중 액세스 통신 네트워크에서 플렉서블 호핑을 위한 방법및 장치
US7543197B2 (en) 2004-12-22 2009-06-02 Qualcomm Incorporated Pruned bit-reversal interleaver
US20060140289A1 (en) 2004-12-27 2006-06-29 Mandyam Giridhar D Method and apparatus for providing an efficient pilot scheme for channel estimation
CN1642335A (zh) 2005-01-06 2005-07-20 东南大学 移动通信系统混合无线资源管理方法
US7778826B2 (en) 2005-01-13 2010-08-17 Intel Corporation Beamforming codebook generation system and associated methods
WO2006077696A1 (ja) 2005-01-18 2006-07-27 Sharp Kabushiki Kaisha 無線通信装置、携帯端末および無線通信方法
JP2006211537A (ja) 2005-01-31 2006-08-10 Nec Corp コード状態変更装置、コード状態変更方法、およびコード状態変更プログラム
KR100966044B1 (ko) 2005-02-24 2010-06-28 삼성전자주식회사 다중 셀 통신 시스템에서 주파수 자원 할당 시스템 및 방법
KR100950644B1 (ko) 2005-03-04 2010-04-01 삼성전자주식회사 다중사용자 다중입출력 시스템의 피드백 방법
KR20060096365A (ko) 2005-03-04 2006-09-11 삼성전자주식회사 다중 사용자 다중입력 다중출력（ｍｕ－ｍｉｍｏ）통신시스템의 사용자 스케줄링 방법
US8135088B2 (en) 2005-03-07 2012-03-13 Q1UALCOMM Incorporated Pilot transmission and channel estimation for a communication system utilizing frequency division multiplexing
US8095141B2 (en) * 2005-03-09 2012-01-10 Qualcomm Incorporated Use of supplemental assignments
US20060203794A1 (en) 2005-03-10 2006-09-14 Qualcomm Incorporated Systems and methods for beamforming in multi-input multi-output communication systems
US7720162B2 (en) 2005-03-10 2010-05-18 Qualcomm Incorporated Partial FFT processing and demodulation for a system with multiple subcarriers
US9246560B2 (en) 2005-03-10 2016-01-26 Qualcomm Incorporated Systems and methods for beamforming and rate control in a multi-input multi-output communication systems
US9154211B2 (en) 2005-03-11 2015-10-06 Qualcomm Incorporated Systems and methods for beamforming feedback in multi antenna communication systems
US7512412B2 (en) 2005-03-15 2009-03-31 Qualcomm, Incorporated Power control and overlapping control for a quasi-orthogonal communication system
US8446892B2 (en) 2005-03-16 2013-05-21 Qualcomm Incorporated Channel structures for a quasi-orthogonal multiple-access communication system
US20090213950A1 (en) 2005-03-17 2009-08-27 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9520972B2 (en) 2005-03-17 2016-12-13 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9461859B2 (en) 2005-03-17 2016-10-04 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9143305B2 (en) 2005-03-17 2015-09-22 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US8031583B2 (en) 2005-03-30 2011-10-04 Motorola Mobility, Inc. Method and apparatus for reducing round trip latency and overhead within a communication system
US7797018B2 (en) 2005-04-01 2010-09-14 Interdigital Technology Corporation Method and apparatus for selecting a multi-band access point to associate with a multi-band mobile station
US9184870B2 (en) 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
US7711033B2 (en) 2005-04-14 2010-05-04 Telefonaktiebolaget Lm Ericsson (Publ) SIR prediction method and apparatus
US9036538B2 (en) 2005-04-19 2015-05-19 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US9408220B2 (en) 2005-04-19 2016-08-02 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US7768979B2 (en) 2005-05-18 2010-08-03 Qualcomm Incorporated Separating pilot signatures in a frequency hopping OFDM system by selecting pilot symbols at least hop away from an edge of a hop region
US7916681B2 (en) 2005-05-20 2011-03-29 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for communication channel error rate estimation
US8077692B2 (en) 2005-05-20 2011-12-13 Qualcomm Incorporated Enhanced frequency division multiple access for wireless communication
WO2006126080A1 (en) 2005-05-26 2006-11-30 Nokia Corporation Method and apparatus for specifying channel state information for multiple carriers
JP4599228B2 (ja) 2005-05-30 2010-12-15 株式会社日立製作所 無線送受信機
US8842693B2 (en) 2005-05-31 2014-09-23 Qualcomm Incorporated Rank step-down for MIMO SCW design employing HARQ
US8879511B2 (en) 2005-10-27 2014-11-04 Qualcomm Incorporated Assignment acknowledgement for a wireless communication system
US8565194B2 (en) 2005-10-27 2013-10-22 Qualcomm Incorporated Puncturing signaling channel for a wireless communication system
US8462859B2 (en) 2005-06-01 2013-06-11 Qualcomm Incorporated Sphere decoding apparatus
US8126066B2 (en) 2005-06-09 2012-02-28 Telefonaktiebolaget Lm Ericsson (Publ) Time and frequency channel estimation
US7403470B2 (en) 2005-06-13 2008-07-22 Qualcomm Incorporated Communications system, methods and apparatus
JP4869724B2 (ja) 2005-06-14 2012-02-08 株式会社エヌ・ティ・ティ・ドコモ 送信装置、送信方法、受信装置及び受信方法
EP1734773A1 (en) 2005-06-14 2006-12-20 Alcatel A method for uplink interference coordination in single frequency networks, a base station a mobile terminal and a mobile network therefor
US8254924B2 (en) 2005-06-16 2012-08-28 Qualcomm Incorporated Method and apparatus for adaptive registration and paging area determination
US9179319B2 (en) 2005-06-16 2015-11-03 Qualcomm Incorporated Adaptive sectorization in cellular systems
US8599945B2 (en) * 2005-06-16 2013-12-03 Qualcomm Incorporated Robust rank prediction for a MIMO system
US8098667B2 (en) 2005-06-16 2012-01-17 Qualcomm Incorporated Methods and apparatus for efficient providing of scheduling information
US8750908B2 (en) 2005-06-16 2014-06-10 Qualcomm Incorporated Quick paging channel with reduced probability of missed page
US20070071147A1 (en) 2005-06-16 2007-03-29 Hemanth Sampath Pseudo eigen-beamforming with dynamic beam selection
US8503371B2 (en) * 2005-06-16 2013-08-06 Qualcomm Incorporated Link assignment messages in lieu of assignment acknowledgement messages
DE102005028179A1 (de) 2005-06-17 2006-12-28 Siemens Ag Verfahren zum Verbindungsaufbau durch mobile Endgeräte in Kommunikationsnetzen mit variablen Bandbreiten
EP1897245A4 (en) 2005-06-20 2013-01-16 Texas Instruments Inc LOW UPLINK POWER SUPPLY CONTROL
KR100606099B1 (ko) 2005-06-22 2006-07-31 삼성전자주식회사 주파수 분할 다중 접속 방식시스템에서의 긍정 및 부정응답 채널을 설정하는 방법 및 장치
CA2612746A1 (en) * 2005-07-04 2007-01-11 Samsung Electronics Co., Ltd. Position measuring system and method using wireless broadband (wibro) signal
US8249192B2 (en) 2005-07-18 2012-08-21 Nokia Corporation Techniques to transmit data rate control signals for multi-carrier wireless systems
US20070025345A1 (en) * 2005-07-27 2007-02-01 Bachl Rainer W Method of increasing the capacity of enhanced data channel on uplink in a wireless communications systems
US7403745B2 (en) 2005-08-02 2008-07-22 Lucent Technologies Inc. Channel quality predictor and method of estimating a channel condition in a wireless communications network
US20070183386A1 (en) 2005-08-03 2007-08-09 Texas Instruments Incorporated Reference Signal Sequences and Multi-User Reference Signal Sequence Allocation
US8885628B2 (en) 2005-08-08 2014-11-11 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
US7508842B2 (en) * 2005-08-18 2009-03-24 Motorola, Inc. Method and apparatus for pilot signal transmission
US7450657B2 (en) * 2005-08-18 2008-11-11 Beceem Communications Inc. Antenna virtualization in communication systems
US20090129501A1 (en) * 2005-08-19 2009-05-21 Mehta Neelesh B Optimal signaling and selection verification for transmit antenna selection with erroneous feedback
US8073068B2 (en) 2005-08-22 2011-12-06 Qualcomm Incorporated Selective virtual antenna transmission
US20070041457A1 (en) 2005-08-22 2007-02-22 Tamer Kadous Method and apparatus for providing antenna diversity in a wireless communication system
US8331463B2 (en) 2005-08-22 2012-12-11 Qualcomm Incorporated Channel estimation in communications
US9209956B2 (en) 2005-08-22 2015-12-08 Qualcomm Incorporated Segment sensitive scheduling
WO2007024913A1 (en) 2005-08-22 2007-03-01 Qualcomm Incorporated Method and apparatus for selection of virtual antennas
US8644292B2 (en) 2005-08-24 2014-02-04 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
EP2665219A1 (en) 2005-08-24 2013-11-20 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US20070047495A1 (en) 2005-08-29 2007-03-01 Qualcomm Incorporated Reverse link soft handoff in a wireless multiple-access communication system
US9136974B2 (en) 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
DE102005041273B4 (de) 2005-08-31 2014-05-08 Intel Mobile Communications GmbH Verfahren zum rechnergestützten Bilden von Systeminformations-Medium-Zugriffs-Steuerungs-Protokollnachrichten, Medium-Zugriffs-Steuerungs-Einheit und Computerprogrammelement
RU2417520C2 (ru) 2005-09-21 2011-04-27 ЭлДжи ЭЛЕКТРОНИКС ИНК. Способ представления канала блокирования управления скоростью передачи комбинированных данных в системе беспроводной связи
US20090022098A1 (en) * 2005-10-21 2009-01-22 Robert Novak Multiplexing schemes for ofdma
US9088384B2 (en) 2005-10-27 2015-07-21 Qualcomm Incorporated Pilot symbol transmission in wireless communication systems
US8045512B2 (en) * 2005-10-27 2011-10-25 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US8582509B2 (en) 2005-10-27 2013-11-12 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US9225416B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Varied signaling channels for a reverse link in a wireless communication system
US9210651B2 (en) 2005-10-27 2015-12-08 Qualcomm Incorporated Method and apparatus for bootstraping information in a communication system
US8693405B2 (en) 2005-10-27 2014-04-08 Qualcomm Incorporated SDMA resource management
US8134977B2 (en) 2005-10-27 2012-03-13 Qualcomm Incorporated Tune-away protocols for wireless systems
US9172453B2 (en) 2005-10-27 2015-10-27 Qualcomm Incorporated Method and apparatus for pre-coding frequency division duplexing system
US7835460B2 (en) 2005-10-27 2010-11-16 Qualcomm Incorporated Apparatus and methods for reducing channel estimation noise in a wireless transceiver
US9144060B2 (en) 2005-10-27 2015-09-22 Qualcomm Incorporated Resource allocation for shared signaling channels
US8477684B2 (en) 2005-10-27 2013-07-02 Qualcomm Incorporated Acknowledgement of control messages in a wireless communication system
US20070165738A1 (en) 2005-10-27 2007-07-19 Barriac Gwendolyn D Method and apparatus for pre-coding for a mimo system
US9225488B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Shared signaling channel
US8649362B2 (en) 2005-11-02 2014-02-11 Texas Instruments Incorporated Methods for determining the location of control channels in the uplink of communication systems
US8582548B2 (en) 2005-11-18 2013-11-12 Qualcomm Incorporated Frequency division multiple access schemes for wireless communication
WO2007065272A1 (en) 2005-12-08 2007-06-14 Nortel Networks Limited Resource assignment systems and methods
US8437251B2 (en) 2005-12-22 2013-05-07 Qualcomm Incorporated Methods and apparatus for communicating transmission backlog information
US9148795B2 (en) 2005-12-22 2015-09-29 Qualcomm Incorporated Methods and apparatus for flexible reporting of control information
US9451491B2 (en) 2005-12-22 2016-09-20 Qualcomm Incorporated Methods and apparatus relating to generating and transmitting initial and additional control information report sets in a wireless system
KR100793315B1 (ko) 2005-12-31 2008-01-11 포스데이타 주식회사 다운링크 프리앰블을 이용한 반송파 신호 대 잡음비 측정장치 및 방법
US8831607B2 (en) 2006-01-05 2014-09-09 Qualcomm Incorporated Reverse link other sector communication
US20070242653A1 (en) 2006-04-13 2007-10-18 Futurewei Technologies, Inc. Method and apparatus for sharing radio resources in an ofdma-based communication system
EP1855424B1 (en) 2006-05-12 2013-07-10 Panasonic Corporation Reservation of radio resources for users in a mobile communications system
CN101512931B (zh) 2006-09-06 2014-03-12 高通股份有限公司 编组天线的码字置换和精简反馈
KR20080036493A (ko) 2006-10-23 2008-04-28 엘지전자 주식회사 이동통신 시스템에서의 망 접속 방법 및 이를 지원하는단말기
CA2819715A1 (en) 2006-11-06 2008-05-15 Qualcomm Incorporated Mimo transmission with layer permutation in a wireless communication system
US8259695B2 (en) 2007-04-30 2012-09-04 Alcatel Lucent Method and apparatus for packet wireless telecommunications
US8254487B2 (en) * 2007-08-09 2012-08-28 Samsung Electronics Co., Ltd. Method and apparatus of codebook-based single-user closed-loop transmit beamforming (SU-CLTB) for OFDM wireless systems
US20090180459A1 (en) 2008-01-16 2009-07-16 Orlik Philip V OFDMA Frame Structures for Uplinks in MIMO Networks
CN102177665B (zh) 2008-08-12 2015-04-22 黑莓有限公司 在无线通信网络中实现下行链路透明中继的方法、设备及系统
US8228862B2 (en) 2008-12-03 2012-07-24 Samsung Electronics Co., Ltd. Method and system for reference signal pattern design
US8238483B2 (en) 2009-02-27 2012-08-07 Marvell World Trade Ltd. Signaling of dedicated reference signal (DRS) precoding granularity
US20100232384A1 (en) 2009-03-13 2010-09-16 Qualcomm Incorporated Channel estimation based upon user specific and common reference signals
KR200471652Y1 (ko) 2013-08-07 2014-03-12 남경탁 의자 일체형 가구

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1337838A (zh) * 2000-07-21 2002-02-27 三星电子株式会社 发射天线分集方法和使用该方法的基站装置和移动站装置
CN1507167A (zh) * 2002-12-11 2004-06-23 华为技术有限公司 一种空时发射分集方法
EP1538772A1 (en) * 2003-12-05 2005-06-08 Samsung Electronics Co., Ltd. Apparatus and method for transmitting data using eigenvector selection in MIMO mobile communication systems

Also Published As

Publication number Publication date
EP1917736A2 (en) 2008-05-07
KR20080032655A (ko) 2008-04-15
ES2525474T3 (es) 2014-12-23
TWI358216B (en) 2012-02-11
CL2009000738A1 (es) 2009-10-02
WO2007024935A3 (en) 2007-06-28
JP2016129337A (ja) 2016-07-14
CN101288245B (zh) 2015-02-18
EP1917736B1 (en) 2014-10-15
CN104660317A (zh) 2015-05-27
JP6022641B2 (ja) 2016-11-09
CN104601212A (zh) 2015-05-06
US20120120925A1 (en) 2012-05-17
CN104618004A (zh) 2015-05-13
TW200718065A (en) 2007-05-01
US20070041457A1 (en) 2007-02-22
US20120140798A1 (en) 2012-06-07
JP6195944B2 (ja) 2017-09-13
JP2015222947A (ja) 2015-12-10
JP5389894B2 (ja) 2014-01-15
US9660776B2 (en) 2017-05-23
JP5405108B2 (ja) 2014-02-05
CN101288245A (zh) 2008-10-15
JP2012100288A (ja) 2012-05-24
CN104660316B (zh) 2018-11-23
KR100954485B1 (ko) 2010-04-22
US9860033B2 (en) 2018-01-02
CL2009000739A1 (es) 2009-05-15
WO2007024935A2 (en) 2007-03-01
US20120140838A1 (en) 2012-06-07
JP2014003625A (ja) 2014-01-09
CN104660316A (zh) 2015-05-27
JP2015053704A (ja) 2015-03-19
CN104618004B (zh) 2020-03-24
JP2009506656A (ja) 2009-02-12
CN104660317B (zh) 2018-02-13

Similar Documents

Publication Publication Date Title
CN104601212B (zh) 用于多输入多输出系统中的天线选择的方法和设备
US8130867B2 (en) Pilot design for improved channel and interference estimation
RU2357364C2 (ru) Мультиплексирование для сотовой системы радиосвязи с множеством несущих
CN102461034B (zh) 在多天线系统中发送参考信号的方法和设备
US9520972B2 (en) Pilot signal transmission for an orthogonal frequency division wireless communication system
CN103368634B (zh) 多天线发射分集方案
US9143305B2 (en) Pilot signal transmission for an orthogonal frequency division wireless communication system
US20150131586A1 (en) Reference signal transmitting method and device in a multi-antenna system
KR101567078B1 (ko) 다중안테나를 이용한 데이터 전송장치 및 방법
CN101341709A (zh) 用于正交频分无线通信系统的导频信号传输
CN101939943A (zh) 用于在多天线ofdm系统中选取循环延迟的方法和系统
KR101108058B1 (ko) 다수의 부 반송파를 이용하여 데이터를 송수신하는 방법

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant