CN101176276B - 以余量共享方式进行的速率选择 - Google Patents
以余量共享方式进行的速率选择 Download PDFInfo
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Abstract
为在每流具有独立速率的系统中以余量共享方式进行速率选择,对多个数据流获得SNR估算。然后基于这些SNR估算为数据流选择速率,并使得至少一个数据流具有负的SNR余量,其余每一数据流具有非负的SNR余量,并且所有数据流的总SNR余量为非负。为在具有向量量化速率集的系统中以余量共享方式进行速率选择,对可使用的传输信道获得SNR估算。基于对各传输信道的SNR估算为每一速率组合确定总SNR余量。每一速率组合与要发射的特定数目的数据流、用于每一数据流的特定速率、以及特定的总吞吐量相关联。选择具有最高总吞吐量和非负总SNR余量的速率组合来使用。
Description
背景
I.领域
本发明一般涉及通信,尤其涉及通信系统中用于选择数据传输速率的技术。
II.背景
在通信系统中,发射机可经由多个传输信道向接收机发射多个数据流。传输信道可以在空域、频域、时域或其组合中形成。例如,这多个传输信道可对应于多输入多输出(MDVIO)通信系统中的不同空间信道、正交频分多路复用(OFDM)通信系统中的不同频率子带、或时分多路复用(TDM)通信系统中的不同时隙。
传输信道可能会经历不同的信道状况(例如,不同的衰落、多径以及干扰效应),并且可实现不同的信噪比(SNR)。传输信道的SNR确定了其传输能力,这通常是由可在该传输信道上可靠地传输的特定数据速率来量化的。如果SNR在各个传输信道之间变化,则所支持的数据速率也在各信道之间变化。此外,如果信道状况随时间变化,则传输信道所支持的数据速率也将随时间变化。
编码式通信系统中的一个主要挑战是基于信道状况来选择多个数据流所使用的适当速率。如此处所使用的,“速率”可指示要一数据流使用的特定的数据速率或信息比特率、特定的编码方案、特定的调制方案等等。速率选择应当使多个传输信道的总吞吐量最大化,同时满足可由目标分组差错率(PER)来量化的某些质量目标。
因此,本领域中需要为多个传输信道上的数据传输选择合适速率的技术。
概述
此处描述了用于执行以余量共享(margin sharing)方式进行的速率选择的技术。根据本发明的一个实施例,提供了一种初始对多个数据流确定SNR估算的方法。然后基于这些SNR估算为各数据流选择速率,并使得至少一个数据流具有负的SNR余量,其余每一数据流具有非负的SNR余量,且所有数据流的总SNR余量为非负。
根据另一实施例,描述了一种包括信道估算器和控制器的设备。信道估算器对多个数据流确定SNR估算。控制器基于这些SNR估算为各数据流选择速率,并使得至少一个数据流具有负的SNR余量,其余每一数据流具有非负的SNR余量,且所有数据流的总SNR余量为非负。
根据又一实施例,描述了一种设备,它包括用于对多个数据流确定SNR估算的装置,以及基于这些SNR估算来为各数据流选择速率、并使得至少一个数据流具有负的SNR余量、其余每一数据流具有非负的SNR余量、且所有数据流的总SNR余量为非负的装置。
根据再一实施例,提供了用于储存指令的处理器可读介质,这些指令可在一设备中操作以对多个数据流获得SNR估算,并基于这些SNR估算为各数据流选择速率,并且使得至少一个数据流具有负的SNR余量,其余每一数据流具有非负的SNR余量,且所有数据流的总SNR余量为非负。
根据还有一个实施例,提供了一种方法,其中初始对可用于数据传输的多个传输信道中的每一个确定SNR估算。然后基于对各传输信道的SNR估算确定多个速率组合中的每一个的总SNR余量。每一速率组合与要发射的数据流的特定数目、用于每一数据流的特定速率、以及特定的总吞吐量相关联。基于总SNR余量以及这些速率组合的总吞吐量从这多个速率组合当中选择一速率组合。
根据再有一个实施例,描述了一种设备,它包括信道估算器和控制器。信道估算器对可用于数据传输的多个传输信道中的每一个确定SNR估算。控制器基于对各传输信道的SNR估算确定多个速率组合中的每一个的总SNR余量,并基于这些速率组合的总SNR余量和总吞吐量从这多个速率组合当中选择一速率组合。
根据另有一个实施例,描述了一种设备,它包括用于对可用于数据传输的多个传输信道中的每一个确定SNR估算的装置、用于基于对各传输信道的SNR估算来确定多个速率组合中的每一个的总SNR余量的装置、以及用于基于这些速率组合的总SNR余量和总吞吐量从这多个速率组合当中选择一速率组合的装置。
以下更详细描述了本发明的各个方面和实施例。
附图简述
图1示出了通信系统中的发射机和接收机。
图2示出了传输信道的接收SNR对比频率的曲线图。
图3示出了每流具有独立速率的速率选择过程。
图4示出了用于执行流排序的(stream-ordered)余量共享的过程。
图5示出了用于执行等级排序的(rank-ordered)余量共享的过程。
图6示出了用于向量量化速率集的速率选择过程。
图7示出了用于向量量化速率集的另一速率选择过程。
图8示出了MIMO系统中的发射机和接收机的图示。
图9示出了发射机处的发射(TX)数据处理器的图示。
详细描述
此处使用措词“示例性”的意指“用作示例、实例或说明”。此处被描述为“示例性”的任何实施例不必被解释为相对于其它实施例是优选或有利的。
此处所描述的以余量共享方式进行速率选择的技术可用于具有多个传输信道的各种通信系统。例如,这些技术可用于MIMO系统、基于OFDM的系统、TDM系统、利用OFDM的MIMO系统(即,MIMO-OFDM系统)等等。MIMO系统在发射机处采用多根(T根)发射天线,并在接收机处采用多根(R根)接收天线进行数据传输。由这T根发射天线和R根接收天线形成的MIMO信道可被分解成S个空间信道,其中S≤min{T,R}。由这S个空间信道可形成S个传输信道。OFDM系统有效地将总系统带宽划分成多个(K个)正交子带,这些子带也被称为音调、副载波、频率槽和频率信道。每一子带与可用数据调制的一相应载波相关联。由K个子带可形成K个传输信道。MIMO-OFDM系统具有对于这K个子带中的每一个具有S个空间信道。由MIMO-OFDM系统中的这些子带的空间信道可形成多达S·K个传输信道。TDM系统可按帧来发射数据,其中每一帧可具有多个(Q个)时隙。可对每一帧中的这Q个时隙形成Q个传输信道。
一般而言,可按各种方式来形成多个传输信道。为清楚起见,以下描述的大部分是针对MIMO-OFDM系统,且每一传输信道可对应于一宽带空间信道(以下描述)。每一传输信道可用于发送一个数据流。
图1示出了多信道通信系统100中的发射机110和接收机150的图示。在发射机110处,TX数据处理器120接收话务数据、根据来自控制器140的M个速率处理(例如,编码、交错和码元映射)该话务数据、并生成M个数据码元流,其中M≥1。如此处所使用的,数据码元是用于话务/分组数据的调制码元,导频码元是用于导频(发射机和接收机两者都事先已知的数据)的调制码元、调制码元是对应于一调制方案(例如,M-PSK或M-QAM)的信号星座图中的一个点的复数值,且码元是任意复数值。TX空间处理器130接收这M个数据码元流并将其与导频码元多路复用、对数据和导频码元(如适用)执行空间处理、并提供T个发射码元流。
发射机单元(TMTR)132处理这T个发射码元流,并生成T个已调制信号,这些信号从T根天线发射并经由第一通信链路148。通信链路148以信道响应使已调制信号畸变,并以加性高斯白噪声(AWGN)并可能以来自其它发射机的干扰进一步使已调制信号劣化。
在接收机150处,R根天线接收发射的信号,并将R个接收信号提供给接收机单元(RCVR)160。接收机单元160调理并数字化这R个接收信号,并以与由发射机单元132执行的处理互补的方式来处理这些样值。接收机单元160将所接收的导频码元提供给信道估算器172,并将R个接收的数据码元流提供给接收(RX)空间处理器170。信道估算器172得到对通信链路148的信道估算,并将信道估算提供给RX空间处理器170。RX空间处理器170以信道估算对R接收数据码元流执行接收机空间处理(或空间匹配滤波),并提供M个已检测码元流,这些码元流是由发射机110发送的M个数据码元流的估算。RX数据处理器180根据为这些流选择的M个速率来处理(例如,码元解映射(demap)、解交错和解码)这M个检测到的码元流并提供已解码数据,该已解码数据是对发射机110所发送的话务数据的估算。RX数据处理器180可进一步将解码结果(例如,每一接收分组的状态和/或解码器度量)提供给速率选择器182。
为进行速率控制,信道估算器172可处理所接收到的导频码元(以及可能还有检测到的数据码元)并对这M个流确定SNR估算。速率选择器182接收这些SNR估算和解码结果、为每一流选择一合适的速率、并将用于这M个流的M个所选速率提供给控制器190。控制器190经由第二通信链路152将速率信息(例如,M个所选速率)以及可能还将其它信息(例如,对接收分组的确认)发送给发射机110。发射机110处的控制器140接收该速率信息,并将这M个速率提供给TX数据处理器120。图1示出了正由接收机150执行速率选择。一般而言,速率选择可由接收机150、发射机110或接收机和发射机两者来执行。
对于MIMO-OFDM系统,发射机和接收机之间的MIMO信道可由一组K个信道响应矩阵H(k)来表征,其中k=1,...,K。每一信道响应矩阵H(k)具有R×T的维数,并包含对应于子带k的每一发射天线和每一接收天线之间的复增益。每一矩阵H(k)包括S个空间信道,其中S≤rnin{T,R}。如下所述,可通过分解H(k)为每一子带k获得S个正交空间信道(或本征模)。在任一情况下,可为MIMO信道形成多达S个宽带空间信道,其中每一宽带空间信道为这K个子带中的每一个包括一个空间信道。例如,每一宽带空间信道可对应于一根发射天线的K个子带。作为另一示例,每一宽带空间信道可为这K个子带中的每一个包括一个本征模。每一宽带空间信道可用作一传输信道。
每一传输信道m的频率响应可由hm(k)给出,其中k=1,...,K,其中hm(k)是对应于传输信道m的子带k的复信道增益。为简明起见,假定hm(k)跨子带k是恒定的。每一传输信道的每一子带的接收SNR可被表达为:
其中,
Pm(k)是用于传输信道m的子带k的发射功率;
N0是接收机处的噪声方差;且
γm(k)是传输信道m的子带k的接收SNR。
式(1)示出了接收SNR的简单表达式。一般而言,接收SNR表达式可包括对应于各种因素的项。例如,如下所述,在MIMO系统中,接收SNR依赖于由发射机和接收机执行的空间处理。为简明起见,噪声方差N0被假定为跨这K个子带恒定。式(1)中的接收SNR以分贝(dB)为单位给出。除非另外注明,否则以下描述的所有SNR计算也是以dB为单位。
图2示出了具有频率选择性衰落的传输信道的接收SNR的示例性曲线图210。对于多径信道,如曲线图210所示,信道增益hm(k)跨K个子带变化,并且对不同的子带实现不同的接收SNR。如线212所示,可确定所有子带的接收SNR的平均SNR。
发射机可在M个传输信道中的每一个上发射一个数据流,其中S≥M≥1。要发射的数据流的数目可基于诸如信道状况、可达到的总吞吐量等各种因素来选择。用于这M个数据流的速率可用各种方式来选择。一般而言,以余量共享方式进行速率控制的技术可用于(1)每流具有独立速率的系统,由此用于每一流的速率可被独立选择,以及(2)具有向量量化速率集的系统,由此仅允许速率的某些组合。
图3示出了用于为每流具有独立速率的系统选择用于M个数据流的速率的过程300。初始,对这M个数据流的中每一个获得SNR估算(也称为有效SNR)(框310)。然后基于对每一流的SNR估算为该数据流选择一速率(框312)。基于对该流的SNR估算以及为该流所选的速率所需的SNR确定用于每一数据流的SNR余量(框314)。基于这M个数据流的SNR余量在可能的情况下向上调整用于至少一个数据流的至少一个速率,使得至少一个流具有负的SNR余量,其余的流具有非负的SNR余量,且所有M个流的总SNR余量为非负(框316)。然后在为这M个流所选的速率下发射这些流,其中通过余量共享,每一速率可能被向上调整或者没有被向上调整(框318)。将在以下更详细描述图3中的各框。
用于每一数据流的速率可基于用于发送该数据流的传输信道的接收SNR来选择。以下描述为每一数据流选择速率(对框310和312)的实施例。对于该实施例,首先例如基于所接收的导频码元来确定每一传输信道的所有子带的接收SNR。
每一数据流/传输信道的平均SNR可被计算为:
其中γavg,m是数据流m的平均SNR,以dB为单位。
每一数据流的接收SNR的方差可被计算为:
其中σsnr,m 2数据流m的SNR方差。
每一数据流的有效SNR可被计算为:
SNReff(m)=γavg,m-γbo,m,m=1,...,M 式(4)其中,
γbo,m是数据流m的补偿因子(back-off factor);并且
SNReff(m)是数据流m的有效SNR(或SNR估算)。
补偿因子γbo,m用于解决诸如接收SNR跨传输信道的可变性等各种因素。补偿因子可以是平均SNR和SNR方差的函数,或者说 例如,补偿因子可被定义为: 其中Kbo是常量。补偿因子也可基于诸如用于数据流的分集、编码方案、交错方案、分组大小等系统专属因素来定义。
系统可支持特定的一组速率。每一支持的速率与实现期望的性能水平(例如,对于非衰落、AWGN信道为1%PER)所需的特定最小SNR相关联。查找表可储存所支持的速率和每一支持的速率所需的SNR。每一数据流的有效SNR可对照所支持的速率所需的SNR进行比较。然后为数据流选择具有最高数据速率和小于或等于有效SNR的所需SNR的支持速率
表1列出了系统所支持的一组示例性14个速率,它们被给予了速率索引0到13。每一速率与特定频谱效率、特定码率、特定调制方案和特定的所需SNR相关联。频谱效率指的是由系统带宽归一化的数据速率(或信息比特率),并且以比特每赫兹每秒(bps/Hz)为单位给出。对应于表1中的每一速率的码率和调制方案是针对特定系统设计的。索引为0的空速率具有零数据速率(或者说没有数据传输)。对于数据速率非零的每一非空速率,所需SNR是基于特定系统设计(即,系统对该速率使用的码率、交错方案、调制方案等)、并且是针对SWGN信道来获得的。如本领域中已知的,所需SNR可通过计算、计算机模拟、经验测量等来获得。对于每一非空速率,SNR间隙(SNR gap)是该速率所需的SNR与下一较高速率的所需SNR之差。由于索引为13的速率是所支持的最高速率,因此其SNR间隙被设为无穷大或某一其它大值。
表1
速率索引 | 频谱效率(bps/Hz) | 码率 | 调帛方案 | 所需SNR(dB) | SNR间隙(dB) |
0 | 0 0 | - | - | - | - |
1 | 0.25 | 1/4 | BPSK | -1.8 | 3.0 |
2 | 0.5 | 1/2 | BPSK | 1.2 | 3.0 |
3 | 1.0 | 1/2 | QPSK | 4.2 | 2.6 |
4 | 1.5 | 3/4 | QPSK | 6.8 | 3.3 |
5 | 2.0 | 1/2 | 16QAM | 10.1 | 1.6 |
6 | 2.5 | 5/8 | 16QAM | 11.7 | 1.5 |
7 | 3.0 | 3/4 | 16QAM | 13.2 | 3.0 |
8 | 3.5 | 7/12 | 64QAM | 16.2 | 1.2 |
9 | 4.0 | 2/3 | 64QAM | 1.74 | 1.4 |
10 | 4.5 | 3/4 | 64QAM | 18.8 | 1.2 |
11 | 5.0 | 5/6 | 64QAM | 20.0 | 4.2 |
12 | 6.0 | 3/4 | 256QAM | 24.2 | 2.1 |
13 | 7.0 | 7/8 | 256QAM | 26.3 | ∝ |
初始可如上所述地为这M个数据流选择M个速率,并将其记为Rm,其中m=1,...,M。在以下描述中,速率Rm和速率索引Rm可互换使用。初始为每一数据流选择的速率的所需SNR小于或等于该流的有效SNR。由此,每一数据流具有非负的SNR余量,这可被表达为:
SNRmargin(m)=SNReff(m)-SNRreq(Rm),m=1,...,M 式(5)
其中,
Rm是初始为数据流选择的速率;
SNRreq(Rm)是速率Rm所需的SNR;并且
SNRmargin(m)是数据流m的SNR余量。
所有M个数据流的总SNR余量可被表达为:
可从任何一个流传递到其它(各)流的SNR余量的量可被限于一预定的最大值,例如 这可通过将式(6)中每一流m的SNRmargm(m)限制在SNRmargm max之内来实现。SNRmargm max可对所有的流固定,或者可以是速率、码率、调制方案、流索引等的函数,它对每一流可以是不同的。限制SNRmargin(m)可减小这M个流的SNR余量中的变动。总SNR余量也可被限于另一预定的最大值,例如 可被重新分配给任何一个流的SNR的量因此被限于SNRtotal_margm max这确保了不会有流在所需SNR过度高于该流的有效SNR的速率下被发送。一般而言,可被重新分配给任何一个流的SNR的量可以被限于SNRre-allo max,这是可以等于或小于SNRtotal_margm max的适当选择的值。SNRre-allo max可以是固定值或者速率、码率、调制方案、流索引等的函数。
如下所述,发射机可以使用单个基码来编码话务数据以生成代码比特,然后将代码比特解析成M个流,并根据为该流选择的速率来进一步处理(例如,穿孔和码元映射)对应于每一流的代码比特。接收机可执行互补的处理、重新组装检测到的对应于这M个流的码元、并对重新组装的检测到的码元进行解码。要在接收机处解码的检测到的码元的序列/分组可以由以不同速率生成的多组检测到的码元构成。每一解码的比特的结果通常受到相邻和附近的检测到的码元的接收SNR的影响。如果检测到的对应于这M个流的码元被一起解码,则用于这些流的SNR余量可在各流间被共享以实现更高的总吞吐量。余量共享以在至少一个流上实现更高的速率为目标来重新分配总SNR余量。以下描述余量共享的若干实施例。
图4示出了用于执行流排序的余量共享的过程316a,它是用于每流具有独立速率的系统的余量共享的第一实施例。过程316a可用于图3中的框316。对于这一实施例,总SNR余量以基于其有效SNR的顺序次序重新分配给这M个流。初始地,基于其有效SNR来将这M个流排序,其中第一个流具有最高的有效SNR,而最后一个流具有最低的有效SNR(框412)。流索引m被初始化为1(框414)。
作为未被考虑的具有最高有效SNR的流的流m被选择(框416)。将流m提升到下一较高速率所需的SNR如下来确定(框418):
其中,
Rmin是最低的支持速率,它是表1中的速率索引0;
Rmax是最高的支持速率,它是表1中的速率索引13;并且
SNRpromote(m)是假定已经移除了流m上的SNR余量的情况下将流m提升到下一较高速率所需的SNR。
如果流m的有效SNR小于-1.8dB,则初始为流m选择空速率Rmin。将流m提升到索引为1的最低非空速率所需的SNR等于速率索引1所需的SNR与流m的有效SNR之差。如果初始为流选择了最高的支持速率Rmax,则将SNRpromote(m)设为无穷大或一大值确保了总SNR余量不足以提升流m。
然后确定总SNR余量是否大于或等于将流m提升到下一较高速率所需的SNR(框420)。如果回答为“是”,则为流m选择下一较高速率(框422),并且如下更新总SNR余量(框424):
SNRtotal_margin=SNRtotal_margin-SNRpromote(m) 式(8)
在框424之后,并且如果对框420的回答为“否”,则确定是否已考虑了所有M个流(框426)。如果回答为“否”,则递增流索引m(框428),并且该过程返回到框416以考虑具有下一较低有效SNR的流。否则,如果已考虑了所有M个流,则该过程终止。尽管在图4中未示出,但是该过程还可在总SNR余量为零或者不能提升任何其余的流的小值的情况下终止。
对于图4中所示的余量共享的第一实施例,这M个流被从最高到最低有效SNR排序,然后以从具有最高有效SNR的流开始的顺序次序每次考虑一个。对于也称为反向流排序余量共享的余量共享的第二实施例,M个流被从最低到最高有效SNR排序,然后以从具有最低有效SNR的流开始的顺序次序每次考虑一个。第二实施例可如图4所示地实现,尽管其中这M个流是以有效SNR的递增次序(而非有效SNR的递减次序)来排序的。
图5示出了用于执行等级排序的余量共享的过程316b,它是用于每流具有独立速率的系统的余量共享的第三实施例。过程316b也可用于图3中的框316。
如下确定图3的框312中的初始为每一流选择一较高速率所需的SNR,也称为差分SNR(框510):
如果初始为流m选择了空速率Rmin,则SNRdiff(m)等于将流m提升到最低非空速率所需的SNR。如果初始为流m选择了最高的支持速率Rmax,则将SNRdiff(m)设为无穷大或一大值确保了流m将被最后一个选择来进行余量共享。如上所述,可重新分配给任何一个流的SNR的量可被限于SNRre-allo max。在这一情况下,如果任一流的差分SNR大于SNRre-allo max则可将该差分SNR设为无穷大,以使得该流将不会被提升。
然后基于其差分SNR来将这M个流排序,其中第一个流具有最低的差分SNR,而最后一个流具有最高的差分SNR(框512)。流索引m被初始化为1(框514)。
作为未被考虑的具有最低差分SNR的流的流m被选择(框516)。然后如式(7)中所示地确定将流m提升到下一较高速率所需的SNR(框518)。在初始为流m选择速率Rm、且流m的SNR余量被包括在总SNR余量中的假设下来计算总SNR余量。由此,需要SNRpromote(m)而非SNRdiff(m)来为流m选择下一较高速率Rm+1。然后确定总SNR余量是否大于或等于将流m提升到下一较高速率所需的SNR(框520)。如果回答为“是”,则为流m选择下一较高速率(框522),并且如式(8)中所示更新总SNR余量(框524)。
在框524之后,并且如果对框520的回答为“否”,则确定是否已考虑了所有M个流(框526)。如果回答为“否”,则递增流索引m(框528),并且该过程返回到框516以考虑具有下一较低差分SNR的流。否则,如果已考虑了所有M个流,则该过程终止。该过程也可在总SNR余量为零或一小值的情况下终止(图5中未示出)。也可重复步骤514到528任意次数,直到用完了所有的可用SNR余量,或者各流已被提升了最大次数,或者没有更多的流可被提升,或者满足某一其它退出准则。该第三实施例以有序的方式提升流,使得(1)需要最少量SNR余量就能提升的流被首先提升,以及(2)需要最多量SNR余量的流被最后提升。该实施例可提高性能并且可允许更多的流被提升。
在用于每流具有独立速率的系统的余量共享的第四实施例中,初始如式(7)所示计算将每一流提升到下一较高速率所需的SNR。然后基于其提升SNR来将这M个流排序,其中第一个流具有最低的提升SNR,而最后一个流具有最高的提升SNR。然后以从具有最低提升SNR的流开始的顺序次序一次一个地考虑这M个流。该第四实施例试图首先提升具有较小提升SNR的流,这可允许提升更多流。
上述余量共享实施例是针对其中用于每一流的速率可被独立选择的系统。这允许将总SNR余量重新分配给任何流。如果总SNR余量允许,则用于每一流的速率被调整到下一较高速率索引Rm+1。
用于一个流的速率也可被向上提升一个以上的速率索引。在一个实施例中,用于每一流的速率可基于总SNR余量而被提升得尽可能高。例如,取代为流m计算SNRpromote(m),可为流m选择具有小于SNReff(m)+SNRtotal_margin的所需SNR的最高速率。在另一实施例中,可将用于每一流的速率提升最多Q个速率索引,其中一般Q≥1。因此,以上图4和5中所示的实施例针对于Q=1的情况。
系统可仅允许速率的某些组合,例如以便于减少要发回给发射机的速率信息的量。系统允许的速率组合的集合通常被称为向量量化速率集。表2示出了用于其中发射机可发射多达4个数据流的系统的示例性向量量化速率集。对于该速率集,速率标识符(ID)0到13对应于一个数据流的传输并且在表1中分别作为速率索引0到13给出,速率ID 14到24对应于两个数据流的传输,速率ID 25到35对应于三个数据流的传输,而速率ID 36到43对应于四个数据流的传输。对于每一速率ID,要发射的流的数目(Num Str)、每一流使用的速率、以及总吞吐量(OTP)/总频谱效率在表2中给出。作为一个示例,对于速率ID 31,总吞吐量是12.0bps/Hz,发射3个流,流1使用速率12(256 QAM和码率3/4),流2使用速率9(64 QAM和码率2/3),并且流3使用速率5(16 QAM和码率1/2)。
表2
以余量共享方式进行的速率控制可在具有向量量化速率集的系统中以各种方式来执行。以下描述若干实施例。
图6示出了根据第一实施例用于在具有向量量化速率集的系统中为数据流选择速率的过程600。初始地,对可用于数据传输的每一传输信道确定有效SNR(框610)。基于这些有效SNR确定每一允许的速率组合的总SNR余量(框612)。具有L个流(其中S≥L≥1)的给定速率组合的总SNR余量可如下确定。首先如式(5)所示计算该速率组合中的每一流m的SNR余量,其中SNReff(m)是用于流m的传输信道的有效SNR,而SNRreq(Rm)是由该速率组合为流m指定的速率的所需SNR。由于指定了该速率组合中用于每一流的速率,因此每一流的SNR余量可以是正或负值。总SNR余量等于该速率组合中的L个流的SNR余量之和,如式(6)中所示。如果该速率组合中的任一流的SNR余量低于一预定最小值(例如,-2dB),则用于该速率组合的总SNR余量可被设为负无穷大或某一大的负值,以使得该速率组合将不会被选中来使用。如果要发射的流的数目是已知的,则仅评估用于该数目的流的速率组合。
具有最高总吞吐量和非负总SNR余量的速率组合被标识(框614)。如果该速率集具有总吞吐量相同的一个以上速率组合,则可在框614中标识多个速率组合。例如,表2中所示的速率集具有总吞吐量为12.0 bps/Hz的五个速率组合。所标识出的具有最大总SNR余量的速率组合被选中来使用(框616)。然后使用所选择的速率组合来发射数据(框618)。
图7示出了根据第二实施例用于在具有向量量化速率集的系统中为各数据流选择速率的过程700。变量max_otp表示对所有数据流实现的最大总吞吐量,并且被初始化为零(框710)。索引e表示要发射的流的数目,并且被初始化为一(框712)。
对用于发射e个数据流的e个传输信道的每一个确定有效SNR(框714)。如上所述,该有效SNR计算可依赖于由发射机和接收机为该e个流执行的空间处理。例如,如上对图6中的框612所描述的,确定用于e个流的每一速率组合的总SNR余量以及大于或等于max_otp的总吞吐量(框716)。对在框716中评估的每一速率组合可以应用或不应用余量共享。如果应用了余量共享,则可使用以上就每流具有独立速率所描述的余量共享实施例的任一个(例如,流排序余量共享、等级排序余量共享等等)。
然后,例如如上对图6中的框614和616所描述的,从所有评估的e个流的速率组合中选择具有最高总吞吐量和最大正总SNR余量的速率组合(框718)。所选择的速率组合被记为RC(e),用于该速率组合的总吞吐量被表示为otp(e),且用于该速率组合的总SNR余量被表示为margin(e)。然后确定用于e个流的最高总吞吐量是否大于当前最大总吞吐量,或者是否otp(e)>max_otp(框720)。如果回答为“是”,则将最大总吞吐量设为用于e个流的最高总吞吐量,将速率组合RC(e)保存在变量max_RC中,并且将用于RC(e)的总SNR余量保存在变量max_margin中(框724)。该过程然后前进到框726。
如果对框720回答为“否”,则确定(1)用于e个流的最高总吞吐量是否等于当前最大总吞吐量,以及(2)用于速率组合RC(e)的总SNR余量是否超过当前max_margin有记为Δmargin的一预定量(框722)。如果用于e个流的速率组合RC(e)和用于少于e个流的另一速率组合RC(j)可达到相同的总吞吐量,则如果速率组合RC(e)的总SNR余量高一预定量,就可选择该速率组合。否则,可选择具有较少流的速率组合RC(j),以便(1)减少发射机和接收机处的处理,以及(2)增强对流之间的串扰的防护。如果对框722的回答为“是”,则在框724中分别将速率组合RC(e)、用于RC(e)的总吞吐量以及用于RC(e)的总SNR余量保存为max_RC、max_otp和max_margin。
如果对框722的回答为“否”,并且也在框724之后,确定是否评估了所有不同数目的流(框726)。如果回答为“否”,则递增索引e(框728),并且该过程返回到框714以评估下一较高数目的流。否则,如果已经评估了所有不同数目的流,则选择速率组合max_RC来使用,并且使用该所选的速率组合来发射数据(框730)。
尽管图7中为简明起见未示出,但是如果用于当前数目的流的最高总吞吐量otp(e)未超过最大总吞吐量,则可终止过程700。例如,如果对框720的回答为“否”,则该过程可执行框722和724然后终止。
在用于在具有向量量化速率集的系统中选择速率的第三实施例中,对每一速率组合计算总的所需SNR作为对用于该速率组合中的所有流的指定速率所需的SNR的总和。用于该速率集中所有速率组合的总的所需SNR和总吞吐量可被储存在一查找表中。为进行速率选择,计算总有效SNR作为可用于数据传输的所有传输信道的有效SNR之和。然后选择具有最高总吞吐量和小于或等于总有效SNR的总所需SNR的速率组合来使用。该实施例未限制可被重新分配给每一流的SNR余量的量。
图3到5示出了用于为每流具有独立速率的系统执行以余量共享方式进行的速率选择的示例性实施例。图6和7示出了用于为具有向量量化速率集的系统执行以余量共享方式进行的速率选择的示例性实施例。以余量共享方式进行的速率选择也可用其它方式来执行。余量共享允许一个或多个流以负SNR余量操作,使得对数据传输可达到更高的总吞吐量。
如上所述,可对各种系统和各种类型的传输信道使用以余量共享方式进行速率选择的技术。在MIMO系统中,可形成不同的传输信道,其中发射机执行不同的空间处理,诸如本征转向(eigensteering)、无转向和空间扩展。
对于本征转向,每一子带的信道响应矩阵H(k)可通过本征值分解来对角化如下:
R(k)=H H(k)·H(k)=E(k)·Λ(k)·E H(k) 式(10)
其中E(k)是本征向量的酉阵,Λ(k)是对角矩阵,而“H”表示共轭转置。发射机可使用转向矩阵E(k)在每一子带k的多达S个正交空间信道(或本征模)上发射数据。每一子带k的对角矩阵Λ(k)包含H(k)的S个本征模的功率增益。每一子带的信道响应矩阵H(k)也可通过奇异值分解来对角化为H(k)=U(k)·∑(k)·E H(k),其中U(k)是左奇异向量的酉阵,E(k)是右奇异向量的酉阵(也是本征向量的矩阵),而∑(k)是H(k)的S个本征模的信道增益的对角矩阵。
对于无转向,发射机在没有任何空间处理的情况下发射数据,例如从每一发射天线发射一个数据流。对于空间扩展,发射机以在频带上变化的不同转向矩阵V(k)来发射数据,使得数据传输观察到有效信道的整体。
表3示出了由发射机执行以实现本征转向、无转向和空间扩展的空间处理。在表3中,下标“es”表示本征转向,“ns”表示无转向,而“ss”表示空间扩展。表3所示的处理是针对给定子带的,由此,为清楚起见省略了子带索引k。s是具有要在一个码元周期中在一个子带上发送的多达S个数据码元的向量。x x是具有要在用于模式x的一个码元周期中在一个子带上从T根发射天线发送的T个发射码元的向量,其中“x”可以是“es”、“ns”或“ss”。H x是由数据向量s对模式x观察到的有效信道响应矩阵。
表3-发射机空间处理
本征转向 | 无转向 | 空间扩展 | |
空间处理 | x es=E·s | x ns=s | x ss=V·s |
有效信道 | H es=H·E | H ns=H | H ss=H·V |
接收机获得的接收码元可被表达为:
r x=H·x x+n=H x·s+n 式(11)
其中r x是用于模式x的接收码元的向量,而n是噪声向量,它被假定为方差为σn 2的AWGN。
表4示出了由接收机执行以获得检测到的码元;的空间处理,该检测到的码元是对s中所发射的数据码元的估算。本征转向可使用全信道状态信息(全CSI)技术。本征转向、无转向和空间扩展可使用信道相关矩阵求逆(CCMI)和最小均方误差(MMSE)技术。对每一技术,接收机基于用于每一子带的实际或有效信道响应矩阵来导出用于该子带的空间滤波矩阵M。接收机然后以该空间滤波矩阵对接收码元执行空间匹配滤波。
表4-接收机空间处理
表4还示出了传输信道m的每一子带k的接收SNR。对于全CSI技术,λm(k)是Λ(k)的第m个对角元素。对于CCMI技术,rm(k)是 的第m个对角元素。对于MMSE技术,qm(k)是M mmse(k)·H x(k)的第m个对角元素。
图8示出了MIMO系统中的发射机810和接收机850的框图。在发射机810处,TX数据处理器820从数据源812接收话务数据、处理(例如,格式化、编码、交错和码元映射)该话务数据、并提供M个数据码元流。TX空间处理器830对数据码元和导频码元(例如,对于本征转向、无转向或者空间扩展)执行空间处理,并将T个发射码元流提供给T个发射机单元(TMTR)832a到832t。每一发射机单元832调理相应的发射码元流并生成已调制信号。来自发射机单元832a到832t的T个已调制信号分别从T根天线834a到834t发送。
在接收机850处,R根天线858a到858r接收来自发射机810的已调制信号,且每根天线向相应的接收机单元(RCVR)860提供接收信号。每一接收机单元860执行与由发射机单元832执行的处理互补的处理并提供接收码元。RX空间处理器870对来自所有R个接收机单元860的接收码元执行空间匹配滤波(例如,以利用全CSI、CCMI或MMSE技术导出的空间滤波矩阵)并提供M个检测到的码元流。RX数据处理器880处理(例如,码元解映射、解交错和解码)检测到的码元并将已解码数据提供给数据宿886。
信道估算器838和888分别为发射机810和接收机850执行信道估算。控制器840和890分别控制发射机810和接收机850处的各种处理单元的操作。存储器单元842和892分别储存控制器840和890使用的程序代码。
为以余量共享方式进行速率选择,信道估算器888估算从发射机810到接收机850的MIMO信道的响应,并确定MIMO信道的空间信道的接收SNR。控制器890基于接收SNR为M个数据流选择速率、以余量共享方式向上调整这些速率中的一个或多个,并提供速率信息。速率信息由TX数据处理器894和TX空间处理器896处理、由发射机单元860调理,并经由天线858发送到发射机810。在发射机810处,来自接收机850的已调制信号由T根天线834接收、由T个接收机单元834调理、并进一步由RX空间处理器844和RX数据处理器846处理以获得来自接收机850的速率信息。控制器840接收该速率信息并将所选的速率提供给TX数据处理器820。
图9示出了发射机810处的TX数据处理器820的一个实施例的框图。在TX数据处理器820内,编码器910根据一编码方案对话务数据编码并生成代码比特。编码方案可包括卷积码、Turbo码、低密度奇偶校验(LDPC)码、循环冗余校验(CRC)码、块码等或其组合。在一个实施例中,编码器910实现对每一数据比特生成两个代码比特的比率1/2二进制卷积编码器。解析器920接收来自编码器910的代码比特并将这些代码比特解析成M个流。
M个流处理器930a到930m接收来自解析器920的M个代码比特流。每一流处理器930包括穿孔单元932、交错器934和码元映射单元936。穿孔单元932对其流中所需数目的代码比特进行穿孔(或删除)以对该流实现所选的代码速率。交错器934基于一交错方案对来自穿孔单元932的代码比特进行交错(或重排)。码元映射单元936根据一所选调制方案映射经交错的比特并提供调制码元。用于每一流的码率和调制方案由为该流所选的速率来确定,例如如表1所示。M个流处理器930a到930m将M个数据码元流提供给TX空间处理器830。
此处所描述的以余量共享方式进行速率选择的技术可由各种手段来实现。例如,这些技术可用硬件、软件或其组合来实现。对于硬件实现,用于执行带余量共享的速率选择的处理单元可在一个或多个专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、处理器、控制器、微控制器、微处理器、被设计成执行此处所描述的功能的其它电子单元或其组合内实现。
对于软件实现,带余量共享的速率选择可用执行此处所描述的功能的模块(例如,过程、函数等)来实现。软件代码可被储存在存储器单元(例如,图1中的存储器单元142和/或192、图8中的存储器单元842和/或892)中并由处理器(例如,图1中的控制器140和/或190、图8中的控制器840和/或890)来执行。存储器单元可以在处理器内实现,或者可在处理器外部,在这一情况下,它可在通信上经由本领域中已知的各种装置耦合到处理器。
提供了对所公开的实施例的前述描述以使本领域的任何技术人员能够制造或使用本发明。本领域的技术人员将容易地清楚对这些实施例的各种修改,并且此处所定义的一般原理可应用于其它实施例而不脱离本发明的精神或范围。由此,本发明并不旨在限于此处所示的实施例,而是符合与此处所公开的原理和新颖特征相一致的最宽范围。
Claims (33)
1.一种在通信系统中执行速率选择的方法,包括:
对多个数据流确定信噪比(SNR)估算;以及
基于所述SNR估算为所述多个数据流选择速率,其中每个数据流都具有一相关联的SNR余量,使得至少一个数据流具有负的SNR余量、其余每一数据流具有非负的SNR余量、且所有数据流的总SNR余量为非负。
2.如权利要求1所述的方法,其特征在于,所示为多个数据流选择速率包括:
基于对每一数据流的SNR估算为所述每一数据流选择一速率,
基于对每一数据流的SNR估算和为所述数据流选择的速率所需的SNR确定每一数据流的SNR余量,以及
基于所述多个数据流的SNR余量向上调整所述至少一个数据流的至少一个速率。
3.如权利要求2所述的方法,其特征在于,所述向上调整至少一个数据流的至少一个速率包括:
基于所述多个数据流的SNR余量确定所述多个数据流的总SNR余量,以及
将所述总SNR余量重新分配给所述至少一个数据流以向上调整所述至少一个速率。
4.如权利要求3所述的方法,其特征在于,将所述总SNR余量重新分配给所述至少一个数据流包括:
以顺序次序一次选择一个数据流,以及
如足够,则将所述总SNR余量重新分配给所选数据流,以向上调整所选数据流的速率。
5.如权利要求4所述的方法,其特征在于,还包括:
基于所述SNR估算以顺序次序将所述多个数据流排序,其中第一个数据流具有最高的SNR估算,而最后一个数据流具有最低的SNR估算。
6.如权利要求4所述的方法,其特征在于,还包括:
基于所述SNR估算以顺序次序将所述多个数据流排序,其中第一个数据流具有最低的SNR估算,而最后一个数据流具有最高的SNR估算。
7.如权利要求4所述的方法,其特征在于,还包括:
基于差分SNR以顺序次序将所述多个数据流排序,其中第一个数据流具有最小的差分SNR,而最后一个数据流具有最大的差分SNR,其中每一数据流的差分SNR对应于所述数据流的下一较高速率所需的SNR与所述数据流的SNR估算之差。
8.如权利要求4所述的方法,其特征在于,还包括:
基于提升SNR以顺序次序将所述多个数据流排序,其中第一个数据流具有最小的提升SNR,而最后一个数据流具有最大的提升SNR,其中每一数据流的提升SNR指示为所述数据流选择下一较高速率所需的额外SNR。
9.如权利要求2所述的方法,其特征在于,还包括:
限制可从任何一个数据流传递到另一数据流的SNR余量的量。
10.如权利要求2所述的方法,其特征在于,还包括:
限制可被重新分配给任何一个数据流的SNR余量的量。
11.如权利要求1所述的方法,其特征在于,所述确定多个数据流的SNR估算包括:
为每一数据流确定接收SNR,
基于每一数据流的接收SNR确定所述数据流的平均SNR,以及
基于每一数据流的所述平均SNR和补偿因子对所述数据流确定SNR估算。
12.一种通信系统中的设备,包括:
信道估算器,可用于对多个数据流确定信噪比(SNR)估算;以及
控制器,可用于基于所述SNR估算为所述多个数据流选择速率,其中每个数据流都具有一相关联的SNR余量、使得至少一个数据流具有负的SNR余量、其余每一数据流具有非负的SNR余量、且所有数据流的总SNR余量为非负。
13.如权利要求12所述的设备,其特征在于,所述控制器可用于基于每一数据流的SNR估算为所述数据流选择一速率、基于对每一数据流的SNR估算和为所述数据流所选的速率所需的SNR确定用于所述数据流的SNR余量、以及基于所述多个数据流的SNR余量向上调整所述至少一个数据流的至少一个速率。
14.如权利要求13所述的设备,其特征在于,所述控制器可用于基于所述多个数据流的SNR余量确定所述多个数据流的总SNR余量,并将所述总SNR余量重新分配给所述至少一个数据流以向上调整所述至少一个速率。
15.如权利要求14所述的设备,其特征在于,所述控制器可用于一次选择一个数据流以重新分配所述总SNR余量,并在足够时将所述总SNR余量重新分配给所选的数据流以向上调整所选数据流的速率。
16.一种通信系统中的设备,包括:
用于对多个数据流确定信噪比(SNR)估算的装置;以及
用于基于所述SNR估算为所述多个数据流选择速率,其中每个数据流都具有一相关联的SNR余量,使得至少一个数据流具有负的SNR余量、其余每一数据流具有非负的SNR余量、且所有数据流的总SNR余量为非负。
17.如权利要求16所述的设备,其特征在于,所述用于为多个数据流选择速率的装置包括:
用于基于对每一数据流的SNR估算为所述数据流选择一速率的装置,
用于基于对每一数据流的SNR估算和为所述数据流所选的速率所需的SNR确定所述数据流的SNR余量的装置,以及
用于基于所述多个数据流的SNR余量向上调整所述至少一个数据流的至少一个速率的装置。
18.如权利要求17所述的设备,其特征在于,所述用于向上调整至少一个数据流的至少一个速率的装置包括:
用于基于所述多个数据流的SNR余量来确定所述多个数据流的总SNR余量的装置,以及
用于将所述总SNR余量重新分配给所述至少一个数据流以向上调整所述至少一个速率的装置。
19.如权利要求18所述的设备,其特征在于,所述用于将总SNR余量重新分配给至少一个数据流的装置包括:
用于一次选择一个数据流以重新分配所述总SNR余量的装置,以及
用于在足够时将所述总SNR余量重新分配给所选择的数据流以向上调整用于所选数据流的速率的装置。
20.一种在通信系统中执行速率选择的方法,包括:
对可用于数据传输的多个传输信道中的每一个确定信噪比(SNR)估算;
基于对所述多个传输信道的SNR估算确定多个速率组合中的每一个的总SNR余量,其中每一速率组合与要发射的数据流的特定数目、每一数据流的特定速率、以及特定的总吞吐量相关联;以及
基于所述多个速率组合的总SNR余量和总吞吐量从所述多个速率组合中选择一速率组合。
21.如权利要求20所述的方法,其特征在于,所述确定每一速率组合的总SNR余量包括:
基于对用于所述速率组合中的每一数据流的传输信道的SNR估算和所述数据流所需的SNR确定所述数据流的SNR余量,以及
对所述速率组合中的所有数据流的SNR余量求和以获得所述速率组合的总SNR余量。
22.如权利要求20所述的方法,其特征在于,还包括:
移除具有SNR余量低于一预定值的至少一个数据流的每一速率组合。
23.如权利要求20所述的方法,其特征在于,所述从多个速率组合中选择所述速率组合包括:
从所述多个速率组合中选择具有最高总吞吐量的速率组合。
24.如权利要求23所述的方法,其特征在于,所述从多个速率组合中选择所述速率组合还包括:
如果有多个速率组合具有所述最高总吞吐量,则选择具有较少数据流的速率组合。
25.如权利要求23所述的方法,其特征在于,所述从多个速率组合中选择所述速率组合包括:
如果有多个速率组合具有最高总吞吐量,则选择具有较大总SNR余量的速率组合。
26.如权利要求20所述的方法,其特征在于,还包括:
以顺序次序选择所述多个速率组合来进行评估,所述次序以具有最少数据流的速率组合开始并以具有最多数据流的速率组合结束。
27.如权利要求26所述的方法,其特征在于,还包括:
以顺序次序选择用于给定数目的数据流的速率组合,所述次序以具有最低总吞吐量的速率组合开始并以具有最高总吞吐量的速率组合结束。
28.一种通信系统中的设备,包括:
可用于对可用于数据传输的多个传输信道中的每一个确定信噪比(SNR)估算的信道估算器;以及
可用于基于对所述多个传输信道的SNR估算来确定多个速率组合中的每一个的总SNR余量、并基于所述多个速率组合的总SNR余量和总吞吐量从所述多个速率组合中选择一速率组合的控制器,其中每一速率组合与要发射的数据流的特定数目、每一数据流的特定速率、以及特定的总吞吐量相关联。
29.如权利要求28所述的设备,其特征在于,所述控制器可用于基于对用于所述速率组合中的每一数据流的传输信道的SNR估算和所述数据流所需的SNR来确定所述数据流的SNR余量,并对每一速率组合中的所有数据流的SNR余量求和以获得所述速率组合的总SNR余量。
30.如权利要求28所述的设备,其特征在于,所述控制器可用于从所述多个速率组合中选择具有最高总吞吐量的速率组合,并在有多个速率组合具有所述最高总吞吐量时选择具有较少数据流或较大总SNR余量的速率组合。
31.一种通信系统中的设备,包括:
用于对可用于数据传输的多个传输信道中的每一个确定信噪比(SNR)估算的装置;
用于基于对所述多个传输信道的SNR估算来确定多个速率组合中的每一个的总SNR余量的装置,其中每一速率组合与要发射的数据流的特定数目、每一数据流的特定速率、以及特定的总吞吐量相关联;以及
用于基于所述多个速率组合的总SNR余量和总吞吐量从所述多个速率组合中选择一速率组合的装置。
32.如权利要求31所述的设备,其特征在于,所述用于确定每一速率组合的总SNR余量的装置包括:
用于基于对用于所述速率组合中的每一数据流的传输信道的SNR估算和所述数据流所需的SNR来确定用于所述数据流的SNR余量的装置,以及
用于对用于所述速率组合中的所有数据流的SNR余量求和以获得所述速率组合的总SNR余量的装置。
33.如权利要求31所述的设备,其特征在于,所述用于从多个速率组合中选择所述速率组合的装置包括:
用于从所述多个速率组合中选择具有最高总吞吐量的速率组合的装置,以及
用于在有多个速率组合具有所述最高总吞吐量时选择具有较少数据流或较大总SNR余量的速率组合的装置。
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US11/128,698 US7466749B2 (en) | 2005-05-12 | 2005-05-12 | Rate selection with margin sharing |
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PCT/US2006/017992 WO2006124427A2 (en) | 2005-05-12 | 2006-05-09 | Rate selection with margin sharing |
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EP (1) | EP1880491A4 (zh) |
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Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8570988B2 (en) | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US20040081131A1 (en) | 2002-10-25 | 2004-04-29 | Walton Jay Rod | OFDM communication system with multiple OFDM symbol sizes |
US8320301B2 (en) | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
US8169944B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8208364B2 (en) | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US7986742B2 (en) | 2002-10-25 | 2011-07-26 | Qualcomm Incorporated | Pilots for MIMO communication system |
US7002900B2 (en) | 2002-10-25 | 2006-02-21 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
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 |
US7466749B2 (en) * | 2005-05-12 | 2008-12-16 | Qualcomm Incorporated | Rate selection with margin sharing |
US20070183523A1 (en) * | 2006-02-09 | 2007-08-09 | Interdigital Technology Corporation | Method and apparatus for improving packet error rate performance using beamforming techniques |
KR101249359B1 (ko) * | 2006-08-18 | 2013-04-01 | 삼성전자주식회사 | 다중 입력 다중 출력을 지원하는 직교 주파수 분할 다중화 시스템에서 채널 품질 정보를 송수신하는 방법 및 장치 |
US8175181B1 (en) | 2007-05-31 | 2012-05-08 | Marvell International Ltd. | Method and apparatus for selecting a modulation coding scheme |
KR100944994B1 (ko) * | 2007-07-04 | 2010-03-05 | 삼성전자주식회사 | 다중 입출력 무선통신 시스템에서 스트림별 유효 신호대잡음비 생성 장치 및 방법 |
US8229017B1 (en) | 2007-12-13 | 2012-07-24 | Marvell International Ltd. | Transmit beamforming utilizing channel estimation matrix decomposition feedback in a wireless MIMO communication system |
US20110258513A1 (en) * | 2008-05-08 | 2011-10-20 | Jing Qian | SNR-Based Variable-Threshold Majority-Logic Decoder |
US7756059B1 (en) | 2008-05-19 | 2010-07-13 | Meru Networks | Differential signal-to-noise ratio based rate adaptation |
JP5218977B2 (ja) | 2008-12-02 | 2013-06-26 | 日本電気株式会社 | 通信装置、無線通信システムおよびフィードバック情報演算時の近似方法ならびにプログラム |
TW201031137A (en) * | 2009-02-12 | 2010-08-16 | Ralink Technology Corp | Method for selecting modulation and coding scheme for multi-antenna system |
TWI530216B (zh) | 2009-03-17 | 2016-04-11 | Interdigital Patent Holdings | 探測參考信號(srs)傳輸功率控制方法及裝置 |
US8923844B2 (en) * | 2009-08-14 | 2014-12-30 | Futurewei Technologies, Inc. | Coordinated beam forming and multi-user MIMO |
US8488514B2 (en) * | 2009-10-02 | 2013-07-16 | Research In Motion Limited | Relay backhaul link quality considerations for mobility procedures |
US8743988B2 (en) * | 2011-07-29 | 2014-06-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Transmission mode adaptation in a wireless network |
TWI478525B (zh) * | 2013-01-23 | 2015-03-21 | Academia Sinica | 多使用者多天線系統之傳送速率動態調節機制 |
CN105101372B (zh) * | 2015-07-13 | 2019-03-01 | 北京大学 | 一种基于内环功率控制性能的用户资源分配方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5790550A (en) * | 1995-07-11 | 1998-08-04 | Alcatel Nv | Method for allocating data elements to a set of carriers, mapping unit and modulator to perform this method |
US6072779A (en) * | 1997-06-12 | 2000-06-06 | Aware, Inc. | Adaptive allocation for variable bandwidth multicarrier communication |
EP1137217A1 (en) * | 2000-03-20 | 2001-09-26 | Telefonaktiebolaget Lm Ericsson | ARQ parameter negociation in a data packet transmission system using link adaptation |
CN1416623A (zh) * | 2000-01-12 | 2003-05-07 | 艾利森电话股份有限公司 | Cdma系统中移动台辅助前向链路开环功率和速率控制 |
Family Cites Families (502)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US728067A (en) * | 1902-04-24 | 1903-05-12 | John V Young | Support for roasts of meat. |
US4679227A (en) * | 1985-05-20 | 1987-07-07 | Telebit Corporation | Ensemble modem structure for imperfect transmission media |
CA1261080A (en) | 1985-12-30 | 1989-09-26 | Shunichiro Tejima | Satellite communications system with random multiple access and time slot reservation |
JPH063956Y2 (ja) | 1986-03-14 | 1994-02-02 | 松下電工株式会社 | 電動ガレ−ジ扉 |
US4750198A (en) | 1986-12-12 | 1988-06-07 | Astronet Corporation/Plessey U.K. | Cellular radiotelephone system providing diverse separately-accessible groups of channels |
US4797879A (en) | 1987-06-05 | 1989-01-10 | American Telephone And Telegraph Company At&T Bell Laboratories | Packet switched interconnection protocols for a star configured optical lan |
JPH03104430U (zh) | 1990-02-14 | 1991-10-30 | ||
IL100213A (en) | 1990-12-07 | 1995-03-30 | Qualcomm Inc | Mikrata Kedma phone system and its antenna distribution system |
US5239677A (en) * | 1991-07-01 | 1993-08-24 | Motorola, Inc. | Method and apparatus for initiating communication on an assigned frequency |
IT1250515B (it) | 1991-10-07 | 1995-04-08 | Sixtel Spa | Rete per area locale senza fili. |
US5241544A (en) | 1991-11-01 | 1993-08-31 | Motorola, Inc. | Multi-channel tdm communication system slot phase correction |
US5592490A (en) | 1991-12-12 | 1997-01-07 | Arraycomm, Inc. | Spectrally efficient high capacity wireless communication systems |
US6850252B1 (en) | 1999-10-05 | 2005-02-01 | Steven M. Hoffberg | Intelligent electronic appliance system and method |
US5295159A (en) | 1992-04-17 | 1994-03-15 | Bell Communications Research, Inc. | Coordinated coding for digital transmission |
RU2015281C1 (ru) | 1992-09-22 | 1994-06-30 | Борис Михайлович Кондрашов | Запорное устройство |
GB2300337B (en) | 1992-10-05 | 1997-03-26 | Ericsson Ge Mobile Communicat | Digital control channel |
US5404355A (en) | 1992-10-05 | 1995-04-04 | Ericsson Ge Mobile Communications, Inc. | Method for transmitting broadcast information in a digital control channel |
DE69327837T2 (de) * | 1992-12-01 | 2000-10-12 | Koninkl Philips Electronics Nv | Teilband-Diversityübertragungssystem |
US5471647A (en) | 1993-04-14 | 1995-11-28 | The Leland Stanford Junior University | Method for minimizing cross-talk in adaptive transmission antennas |
US5479447A (en) * | 1993-05-03 | 1995-12-26 | The Board Of Trustees Of The Leland Stanford, Junior University | Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines |
US5483667A (en) | 1993-07-08 | 1996-01-09 | Northern Telecom Limited | Frequency plan for a cellular network |
DE69423546T2 (de) | 1993-07-09 | 2000-09-21 | Koninkl Philips Electronics Nv | Telekommunikationsnetzwerk, Hauptstation und Nebenstation zum Gebrauch in solchem Netzwerk |
ZA946674B (en) | 1993-09-08 | 1995-05-02 | Qualcomm Inc | Method and apparatus for determining the transmission data rate in a multi-user communication system |
US5506861A (en) | 1993-11-22 | 1996-04-09 | Ericsson Ge Mobile Comminications Inc. | System and method for joint demodulation of CDMA signals |
US5490087A (en) | 1993-12-06 | 1996-02-06 | Motorola, Inc. | Radio channel access control |
US5418813A (en) | 1993-12-06 | 1995-05-23 | Motorola, Inc. | Method and apparatus for creating a composite waveform |
US5422733A (en) * | 1994-02-04 | 1995-06-06 | Motorola, Inc. | Method and apparatus for facsimile communication of first and second type information with selective call communication systems |
US5491837A (en) * | 1994-03-07 | 1996-02-13 | Ericsson Inc. | Method and system for channel allocation using power control and mobile-assisted handover measurements |
US5493712A (en) | 1994-03-23 | 1996-02-20 | At&T Corp. | Fast AGC for TDMA radio systems |
CA2189150A1 (en) | 1994-05-02 | 1995-11-09 | Robert John Schwendeman | Multiple subchannel flexible protocol method and apparatus |
US5677909A (en) | 1994-05-11 | 1997-10-14 | Spectrix Corporation | Apparatus for exchanging data between a central station and a plurality of wireless remote stations on a time divided commnication channel |
US6157343A (en) | 1996-09-09 | 2000-12-05 | Telefonaktiebolaget Lm Ericsson | Antenna array calibration |
DE4425713C1 (de) | 1994-07-20 | 1995-04-20 | Inst Rundfunktechnik Gmbh | Verfahren zur Vielträger Modulation und Demodulation von digital codierten Daten |
FR2724084B1 (fr) | 1994-08-31 | 1997-01-03 | Alcatel Mobile Comm France | Systeme de transmission d'informations par un canal de transmission variant dans le temps, et equipements d'emission et de reception correspondants |
ZA957858B (en) | 1994-09-30 | 1996-04-22 | Qualcomm Inc | Multipath search processor for a spread spectrum multiple access communication system |
US5710768A (en) | 1994-09-30 | 1998-01-20 | Qualcomm Incorporated | Method of searching for a bursty signal |
JPH08274756A (ja) | 1995-03-30 | 1996-10-18 | Toshiba Corp | 無線通信システム |
JP3231575B2 (ja) * | 1995-04-18 | 2001-11-26 | 三菱電機株式会社 | 無線データ伝送装置 |
KR0155818B1 (ko) | 1995-04-29 | 1998-11-16 | 김광호 | 다중 반송파 전송시스템에서 적응형 전력 분배 방법 및 장치 |
US5606729A (en) | 1995-06-21 | 1997-02-25 | Motorola, Inc. | Method and apparatus for implementing a received signal quality measurement in a radio communication system |
US5729542A (en) | 1995-06-28 | 1998-03-17 | Motorola, Inc. | Method and apparatus for communication system access |
US7929498B2 (en) | 1995-06-30 | 2011-04-19 | Interdigital Technology Corporation | Adaptive forward power control and adaptive reverse power control for spread-spectrum communications |
US5638369A (en) | 1995-07-05 | 1997-06-10 | Motorola, Inc. | Method and apparatus for inbound channel selection in a communication system |
GB9514659D0 (en) | 1995-07-18 | 1995-09-13 | Northern Telecom Ltd | An antenna downlink beamsteering arrangement |
US5867539A (en) | 1995-07-21 | 1999-02-02 | Hitachi America, Ltd. | Methods and apparatus for reducing the effect of impulse noise on receivers |
JP2802255B2 (ja) | 1995-09-06 | 1998-09-24 | 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 | 直交周波数分割多重伝送方式及びそれを用いる送信装置と受信装置 |
GB9521739D0 (en) | 1995-10-24 | 1996-01-03 | Nat Transcommunications Ltd | Decoding carriers encoded using orthogonal frequency division multiplexing |
US6005876A (en) * | 1996-03-08 | 1999-12-21 | At&T Corp | Method and apparatus for mobile data communication |
US5699365A (en) | 1996-03-27 | 1997-12-16 | Motorola, Inc. | Apparatus and method for adaptive forward error correction in data communications |
US5924015A (en) | 1996-04-30 | 1999-07-13 | Trw Inc | Power control method and apparatus for satellite based telecommunications system |
IL120574A (en) | 1996-05-17 | 2002-09-12 | Motorala Ltd | Methods and devices for transmitter track weights |
JPH09307526A (ja) | 1996-05-17 | 1997-11-28 | Mitsubishi Electric Corp | デジタル放送受信機 |
JPH09327073A (ja) | 1996-06-07 | 1997-12-16 | N T T Ido Tsushinmo Kk | Cdma移動通信システムにおけるパイロットチャネル配置および送信方法 |
US5822374A (en) * | 1996-06-07 | 1998-10-13 | Motorola, Inc. | Method for fine gains adjustment in an ADSL communications system |
FI101920B1 (fi) | 1996-06-07 | 1998-09-15 | Nokia Telecommunications Oy | Kanavanvarausmenetelmä pakettiverkkoa varten |
US6798735B1 (en) * | 1996-06-12 | 2004-09-28 | Aware, Inc. | Adaptive allocation for variable bandwidth multicarrier communication |
US6097771A (en) | 1996-07-01 | 2000-08-01 | Lucent Technologies Inc. | Wireless communications system having a layered space-time architecture employing multi-element antennas |
JPH1028077A (ja) | 1996-07-11 | 1998-01-27 | Takuro Sato | 通信装置 |
JPH1051402A (ja) * | 1996-08-01 | 1998-02-20 | Nec Corp | 受信電界検出回路 |
US6067292A (en) | 1996-08-20 | 2000-05-23 | Lucent Technologies Inc | Pilot interference cancellation for a coherent wireless code division multiple access receiver |
US6144711A (en) | 1996-08-29 | 2000-11-07 | Cisco Systems, Inc. | Spatio-temporal processing for communication |
JP2001359152A (ja) | 2000-06-14 | 2001-12-26 | Sony Corp | 無線通信システム、無線基地局装置、無線移動局装置、無線ゾーン割当て方法及び無線通信方法 |
JP2846860B2 (ja) * | 1996-10-01 | 1999-01-13 | ユニデン株式会社 | スペクトル拡散通信方式を用いた送信機、受信機、通信システム及び通信方法 |
US6275543B1 (en) | 1996-10-11 | 2001-08-14 | Arraycomm, Inc. | Method for reference signal generation in the presence of frequency offsets in a communications station with spatial processing |
TW496620U (en) | 1996-10-16 | 2002-07-21 | Behavior Tech Computer Corp | Wireless data transmitting apparatus |
US5886988A (en) | 1996-10-23 | 1999-03-23 | Arraycomm, Inc. | Channel assignment and call admission control for spatial division multiple access communication systems |
US6049548A (en) | 1996-11-22 | 2000-04-11 | Stanford Telecommunications, Inc. | Multi-access CS-P/CD-E system and protocols on satellite channels applicable to a group of mobile users in close proximity |
IL130034A (en) | 1996-11-26 | 2003-04-10 | Trw Inc | Cochannel signal processing system |
US5896376A (en) | 1996-12-13 | 1999-04-20 | Ericsson Inc. | Optimal use of logical channels within a mobile telecommunications network |
US6232918B1 (en) | 1997-01-08 | 2001-05-15 | Us Wireless Corporation | Antenna array calibration in wireless communication systems |
JPH10209956A (ja) | 1997-01-28 | 1998-08-07 | Nippon Telegr & Teleph Corp <Ntt> | 無線パケット通信方法 |
US6128276A (en) * | 1997-02-24 | 2000-10-03 | Radix Wireless, Inc. | Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays |
JPH10303794A (ja) | 1997-02-27 | 1998-11-13 | Mitsubishi Electric Corp | 既知系列検出器 |
US6084915A (en) | 1997-03-03 | 2000-07-04 | 3Com Corporation | Signaling method having mixed-base shell map indices |
US6175550B1 (en) | 1997-04-01 | 2001-01-16 | Lucent Technologies, Inc. | Orthogonal frequency division multiplexing system with dynamically scalable operating parameters and method thereof |
KR100267856B1 (ko) | 1997-04-16 | 2000-10-16 | 윤종용 | 이동통신시스템에서오버헤드채널관리방법및장치 |
US6308080B1 (en) | 1997-05-16 | 2001-10-23 | Texas Instruments Incorporated | Power control in point-to-multipoint systems |
US6008760A (en) * | 1997-05-23 | 1999-12-28 | Genghis Comm | Cancellation system for frequency reuse in microwave communications |
FR2764143A1 (fr) | 1997-05-27 | 1998-12-04 | Philips Electronics Nv | Procede de determination d'un format d'emission de symboles dans un systeme de transmission et systeme |
US5867478A (en) | 1997-06-20 | 1999-02-02 | Motorola, Inc. | Synchronous coherent orthogonal frequency division multiplexing system, method, software and device |
US6067458A (en) | 1997-07-01 | 2000-05-23 | Qualcomm Incorporated | Method and apparatus for pre-transmission power control using lower rate for high rate communication |
US6108369A (en) | 1997-07-11 | 2000-08-22 | Telefonaktiebolaget Lm Ericsson | Channelization code allocation for radio communication systems |
US6333953B1 (en) | 1997-07-21 | 2001-12-25 | Ericsson Inc. | System and methods for selecting an appropriate detection technique in a radiocommunication system |
EP0895387A1 (de) | 1997-07-28 | 1999-02-03 | Deutsche Thomson-Brandt Gmbh | Erkennung des Übertragungsmodus eines DVB-Signales |
US6141542A (en) | 1997-07-31 | 2000-10-31 | Motorola, Inc. | Method and apparatus for controlling transmit diversity in a communication system |
CN1086061C (zh) | 1997-08-12 | 2002-06-05 | 鸿海精密工业股份有限公司 | 电连接器的固持装置 |
US6131016A (en) | 1997-08-27 | 2000-10-10 | At&T Corp | Method and apparatus for enhancing communication reception at a wireless communication terminal |
JP2991167B2 (ja) | 1997-08-27 | 1999-12-20 | 三菱電機株式会社 | Tdma可変スロット割当方法 |
EP0899896A1 (de) | 1997-08-27 | 1999-03-03 | Siemens Aktiengesellschaft | Verfahren und Einrichtung zur Schätzung räumlicher Parameter von Überstragungskanälen |
US6167031A (en) | 1997-08-29 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for selecting a combination of modulation and channel coding schemes in a digital communication system |
BR9812816A (pt) * | 1997-09-15 | 2000-08-08 | Adaptive Telecom Inc | Processos para comunicação sem fio, e para eficientemente determinar na estação base um canal espacial da unidade móvel em um sistema de comunicação sem fio, e, estação base de cdma |
US6389000B1 (en) | 1997-09-16 | 2002-05-14 | Qualcomm Incorporated | Method and apparatus for transmitting and receiving high speed data in a CDMA communication system using multiple carriers |
US6590928B1 (en) | 1997-09-17 | 2003-07-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Frequency hopping piconets in an uncoordinated wireless multi-user system |
AUPO932297A0 (en) | 1997-09-19 | 1997-10-09 | Commonwealth Scientific And Industrial Research Organisation | Medium access control protocol for data communications |
KR100234329B1 (ko) * | 1997-09-30 | 1999-12-15 | 윤종용 | Ofdm 시스템 수신기의 fft 윈도우 위치 복원장치 및 그 방법_ |
US6178196B1 (en) | 1997-10-06 | 2001-01-23 | At&T Corp. | Combined interference cancellation and maximum likelihood decoding of space-time block codes |
US6574211B2 (en) | 1997-11-03 | 2003-06-03 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
US6377812B1 (en) | 1997-11-20 | 2002-04-23 | University Of Maryland | Combined power control and space-time diversity in mobile cellular communications |
US6122247A (en) * | 1997-11-24 | 2000-09-19 | Motorola Inc. | Method for reallocating data in a discrete multi-tone communication system |
JPH11163823A (ja) | 1997-11-26 | 1999-06-18 | Victor Co Of Japan Ltd | 直交周波数分割多重信号伝送方法、送信装置及び受信装置 |
US5936569A (en) | 1997-12-02 | 1999-08-10 | Nokia Telecommunications Oy | Method and arrangement for adjusting antenna pattern |
US6154661A (en) * | 1997-12-10 | 2000-11-28 | Arraycomm, Inc. | Transmitting on the downlink using one or more weight vectors determined to achieve a desired radiation pattern |
US6084917A (en) * | 1997-12-16 | 2000-07-04 | Integrated Telecom Express | Circuit for configuring and dynamically adapting data and energy parameters in a multi-channel communications system |
US6175588B1 (en) * | 1997-12-30 | 2001-01-16 | Motorola, Inc. | Communication device and method for interference suppression using adaptive equalization in a spread spectrum communication system |
US6088387A (en) | 1997-12-31 | 2000-07-11 | At&T Corp. | Multi-channel parallel/serial concatenated convolutional codes and trellis coded modulation encoder/decoder |
EP0929172B1 (en) | 1998-01-06 | 2010-06-02 | MOSAID Technologies Inc. | Multicarrier modulation system, with variable symbol rates |
JP3724940B2 (ja) | 1998-01-08 | 2005-12-07 | 株式会社東芝 | Ofdmダイバーシチ受信装置 |
US5982327A (en) | 1998-01-12 | 1999-11-09 | Motorola, Inc. | Adaptive array method, device, base station and subscriber unit |
US6608874B1 (en) | 1998-01-12 | 2003-08-19 | Hughes Electronics Corporation | Method and apparatus for quadrature multi-pulse modulation of data for spectrally efficient communication |
EP0930752A3 (en) | 1998-01-14 | 1999-10-20 | Motorola, Inc. | Method for allocating data and power in a discrete multitone communication system |
US5973638A (en) | 1998-01-30 | 1999-10-26 | Micronetics Wireless, Inc. | Smart antenna channel simulator and test system |
EP0938208A1 (en) | 1998-02-22 | 1999-08-25 | Sony International (Europe) GmbH | Multicarrier transmission, compatible with the existing GSM system |
WO1999044379A1 (en) | 1998-02-27 | 1999-09-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Multiple access categorization for mobile station |
JP3082756B2 (ja) * | 1998-02-27 | 2000-08-28 | 日本電気株式会社 | マルチキャリア伝送システム及びその方法 |
US6141388A (en) | 1998-03-11 | 2000-10-31 | Ericsson Inc. | Received signal quality determination method and systems for convolutionally encoded communication channels |
US6058107A (en) | 1998-04-08 | 2000-05-02 | Motorola, Inc. | Method for updating forward power control in a communication system |
US6317466B1 (en) | 1998-04-15 | 2001-11-13 | Lucent Technologies Inc. | Wireless communications system having a space-time architecture employing multi-element antennas at both the transmitter and receiver |
US6615024B1 (en) | 1998-05-01 | 2003-09-02 | Arraycomm, Inc. | Method and apparatus for determining signatures for calibrating a communication station having an antenna array |
US7123628B1 (en) | 1998-05-06 | 2006-10-17 | Lg Electronics Inc. | Communication system with improved medium access control sub-layer |
US6205410B1 (en) * | 1998-06-01 | 2001-03-20 | Globespan Semiconductor, Inc. | System and method for bit loading with optimal margin assignment |
CN1314037A (zh) | 1998-06-19 | 2001-09-19 | 艾利森电话股份有限公司 | 扩频无线电通信的帧同步技术和系统 |
US6795424B1 (en) | 1998-06-30 | 2004-09-21 | Tellabs Operations, Inc. | Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems |
JP2000092009A (ja) | 1998-07-13 | 2000-03-31 | Sony Corp | 通信方法、送信機及び受信機 |
WO2000004728A2 (en) | 1998-07-16 | 2000-01-27 | Samsung Electronics Co., Ltd. | Processing packet data in mobile communication system |
US6154443A (en) | 1998-08-11 | 2000-11-28 | Industrial Technology Research Institute | FFT-based CDMA RAKE receiver system and method |
US6594620B1 (en) | 1998-08-17 | 2003-07-15 | Aspen Technology, Inc. | Sensor validation apparatus and method |
IL141464A0 (en) | 1998-08-18 | 2002-03-10 | Beamreach Networks Inc | Stacked-carrier discrete multiple tone communication technology |
KR100429540B1 (ko) | 1998-08-26 | 2004-08-09 | 삼성전자주식회사 | 이동통신시스템의패킷데이터통신장치및방법 |
US6515617B1 (en) | 1998-09-01 | 2003-02-04 | Hughes Electronics Corporation | Method and system for position determination using geostationary earth orbit satellite |
DE19842712C1 (de) | 1998-09-17 | 2000-05-04 | Siemens Ag | Verfahren und Anordnung zur Minimierung des Autokorrelationsfehlers bei der Demodulation eines Spreizspektrum-Signals unter Mehrwegeausbreitung |
US6292917B1 (en) | 1998-09-30 | 2001-09-18 | Agere Systems Guardian Corp. | Unequal error protection for digital broadcasting using channel classification |
EP0993212B1 (en) | 1998-10-05 | 2006-05-24 | Sony Deutschland GmbH | Random access channel partitioning scheme for CDMA system |
EP0993211B1 (en) | 1998-10-05 | 2005-01-12 | Sony International (Europe) GmbH | Random access channel partitioning scheme for CDMA system |
US6711121B1 (en) * | 1998-10-09 | 2004-03-23 | At&T Corp. | Orthogonal code division multiplexing for twisted pair channels |
WO2000025492A1 (de) * | 1998-10-27 | 2000-05-04 | Siemens Aktiengesellschaft | Kanalzuweisungsverfahren und vorrichtung für kodierte und kombinierte informationssätze |
JP4287536B2 (ja) | 1998-11-06 | 2009-07-01 | パナソニック株式会社 | Ofdm送受信装置及びofdm送受信方法 |
ES2185244T3 (es) | 1998-12-03 | 2003-04-16 | Fraunhofer Ges Forschung | Aparato y procedimiento para transmitir informacion y aparato y procedimiento para recibir informacion. |
GB9827182D0 (en) | 1998-12-10 | 1999-02-03 | Philips Electronics Nv | Radio communication system |
FI108588B (fi) | 1998-12-15 | 2002-02-15 | Nokia Corp | Menetelmä ja radiojärjestelmä digitaalisen signaalin siirtoon |
JP2000244441A (ja) | 1998-12-22 | 2000-09-08 | Matsushita Electric Ind Co Ltd | Ofdm送受信装置 |
US6310909B1 (en) * | 1998-12-23 | 2001-10-30 | Broadcom Corporation | DSL rate adaptation |
US6266528B1 (en) | 1998-12-23 | 2001-07-24 | Arraycomm, Inc. | Performance monitor for antenna arrays |
US6463290B1 (en) | 1999-01-08 | 2002-10-08 | Trueposition, Inc. | Mobile-assisted network based techniques for improving accuracy of wireless location system |
RU2152132C1 (ru) | 1999-01-26 | 2000-06-27 | Государственное унитарное предприятие Воронежский научно-исследовательский институт связи | Линия радиосвязи с пространственной модуляцией |
JP3619729B2 (ja) | 2000-01-19 | 2005-02-16 | 松下電器産業株式会社 | 無線受信装置および無線受信方法 |
KR100651457B1 (ko) | 1999-02-13 | 2006-11-28 | 삼성전자주식회사 | 부호분할다중접속 이동통신시스템의 불연속 전송모드에서 연속적인 외부순환 전력제어장치 및 방법 |
US6574267B1 (en) | 1999-03-22 | 2003-06-03 | Golden Bridge Technology, Inc. | Rach ramp-up acknowledgement |
US6346910B1 (en) | 1999-04-07 | 2002-02-12 | Tei Ito | Automatic array calibration scheme for wireless point-to-multipoint communication networks |
US6363267B1 (en) | 1999-04-07 | 2002-03-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Mobile terminal decode failure procedure in a wireless local area network |
CA2371958C (en) | 1999-04-12 | 2006-07-25 | Samsung Electronics Co., Ltd. | Apparatus and method for gated transmission in a cdma communication system |
EP1075093A1 (en) | 1999-08-02 | 2001-02-07 | Interuniversitair Micro-Elektronica Centrum Vzw | A method and apparatus for multi-user transmission |
US6594798B1 (en) | 1999-05-21 | 2003-07-15 | Microsoft Corporation | Receiver-driven layered error correction multicast over heterogeneous packet networks |
US6532562B1 (en) | 1999-05-21 | 2003-03-11 | Microsoft Corp | Receiver-driven layered error correction multicast over heterogeneous packet networks |
US6594473B1 (en) | 1999-05-28 | 2003-07-15 | Texas Instruments Incorporated | Wireless system with transmitter having multiple transmit antennas and combining open loop and closed loop transmit diversities |
KR100605978B1 (ko) | 1999-05-29 | 2006-07-28 | 삼성전자주식회사 | 부호분할다중접속 이동통신시스템의 불연속 전송모드에서 연속적인 외부순환 전력제어를 위한 송수신 장치 및 방법 |
US7072410B1 (en) | 1999-06-01 | 2006-07-04 | Peter Monsen | Multiple access system and method for multibeam digital radio systems |
US6141567A (en) | 1999-06-07 | 2000-10-31 | Arraycomm, Inc. | Apparatus and method for beamforming in a changing-interference environment |
US6385264B1 (en) | 1999-06-08 | 2002-05-07 | Qualcomm Incorporated | Method and apparatus for mitigating interference between base stations in a wideband CDMA system |
US6976262B1 (en) | 1999-06-14 | 2005-12-13 | Sun Microsystems, Inc. | Web-based enterprise management with multiple repository capability |
KR100330244B1 (ko) | 1999-07-08 | 2002-03-25 | 윤종용 | 이동 통신시스템의 데이터 레이트 검출 장치 및 방법 |
US6163296A (en) | 1999-07-12 | 2000-12-19 | Lockheed Martin Corp. | Calibration and integrated beam control/conditioning system for phased-array antennas |
RU2168278C2 (ru) | 1999-07-16 | 2001-05-27 | Корпорация "Самсунг Электроникс" | Способ произвольного доступа абонентов мобильной станции |
US6532225B1 (en) | 1999-07-27 | 2003-03-11 | At&T Corp | Medium access control layer for packetized wireless systems |
US6067290A (en) * | 1999-07-30 | 2000-05-23 | Gigabit Wireless, Inc. | Spatial multiplexing in a cellular network |
JP2001044930A (ja) | 1999-07-30 | 2001-02-16 | Matsushita Electric Ind Co Ltd | 無線通信装置および無線通信方法 |
US6721339B2 (en) * | 1999-08-17 | 2004-04-13 | Lucent Technologies Inc. | Method of providing downlink transmit diversity |
US6735188B1 (en) | 1999-08-27 | 2004-05-11 | Tachyon, Inc. | Channel encoding and decoding method and apparatus |
US6115406A (en) | 1999-09-10 | 2000-09-05 | Interdigital Technology Corporation | Transmission using an antenna array in a CDMA communication system |
US6278726B1 (en) | 1999-09-10 | 2001-08-21 | Interdigital Technology Corporation | Interference cancellation in a spread spectrum communication system |
US6426971B1 (en) | 1999-09-13 | 2002-07-30 | Qualcomm Incorporated | System and method for accurately predicting signal to interference and noise ratio to improve communications system performance |
SG80071A1 (en) * | 1999-09-24 | 2001-04-17 | Univ Singapore | Downlink beamforming method |
JP3421671B2 (ja) | 1999-09-30 | 2003-06-30 | 独立行政法人通信総合研究所 | 通信システム、選択装置、送信装置、受信装置、選択方法、送信方法、受信方法、および、情報記録媒体 |
US7006482B1 (en) | 1999-10-02 | 2006-02-28 | Samsung Electronics Co., Ltd. | Apparatus and method for gating data on a control channel in a CDMA communication system |
DE19950005A1 (de) * | 1999-10-18 | 2001-04-19 | Bernhard Walke | Verfahren zum Betrieb drahtloser Basisstationen für paketvermittelnde Funksysteme mit garantierter Dienstgüte |
DE19951525C2 (de) | 1999-10-26 | 2002-01-24 | Siemens Ag | Verfahren zum Kalibrieren einer elektronisch phasengesteuerten Gruppenantenne in Funk-Kommunikationssystemen |
US6492942B1 (en) | 1999-11-09 | 2002-12-10 | Com Dev International, Inc. | Content-based adaptive parasitic array antenna system |
JP3416597B2 (ja) | 1999-11-19 | 2003-06-16 | 三洋電機株式会社 | 無線基地局 |
US7088671B1 (en) | 1999-11-24 | 2006-08-08 | Peter Monsen | Multiple access technique for downlink multibeam digital radio systems |
US7110785B1 (en) | 1999-12-03 | 2006-09-19 | Nortel Networks Limited | Performing power control in a mobile communications system |
US6298092B1 (en) | 1999-12-15 | 2001-10-02 | Iospan Wireless, Inc. | Methods of controlling communication parameters of wireless systems |
EP1109326A1 (en) | 1999-12-15 | 2001-06-20 | Lucent Technologies Inc. | Peamble detector for a CDMA receiver |
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 |
JP3975629B2 (ja) | 1999-12-16 | 2007-09-12 | ソニー株式会社 | 画像復号装置及び画像復号方法 |
US6298035B1 (en) | 1999-12-21 | 2001-10-02 | Nokia Networks Oy | Estimation of two propagation channels in OFDM |
JP2001186051A (ja) | 1999-12-24 | 2001-07-06 | Toshiba Corp | データ信号判定回路及び方法 |
KR100467543B1 (ko) | 1999-12-28 | 2005-01-24 | 엔티티 도꼬모 인코퍼레이티드 | 채널추정 방법 및 통신장치 |
US6718160B2 (en) | 1999-12-29 | 2004-04-06 | Airnet Communications Corp. | Automatic configuration of backhaul and groundlink frequencies in a wireless repeater |
US6888809B1 (en) | 2000-01-13 | 2005-05-03 | Lucent Technologies Inc. | Space-time processing for multiple-input, multiple-output, wireless systems |
US7254171B2 (en) | 2000-01-20 | 2007-08-07 | Nortel Networks Limited | Equaliser for digital communications systems and method of equalisation |
JP3581072B2 (ja) * | 2000-01-24 | 2004-10-27 | 株式会社エヌ・ティ・ティ・ドコモ | チャネル構成方法及びその方法を利用する基地局 |
KR100325367B1 (ko) * | 2000-01-28 | 2002-03-04 | 박태진 | 직교 주파수 분할 다중 통신 시스템에서의 비트 오율 측정장치및 방법 |
JP2001217896A (ja) | 2000-01-31 | 2001-08-10 | Matsushita Electric Works Ltd | 無線データ通信システム |
US7003044B2 (en) * | 2000-02-01 | 2006-02-21 | Sasken Communication Technologies Ltd. | Method for allocating bits and power in multi-carrier communication system |
FI117465B (fi) | 2000-02-03 | 2006-10-31 | Danisco Sweeteners Oy | Menetelmä pureskeltavien ytimien kovapinnoittamiseksi |
US6868120B2 (en) | 2000-02-08 | 2005-03-15 | Clearwire Corporation | Real-time system for measuring the Ricean K-factor |
US6704374B1 (en) | 2000-02-16 | 2004-03-09 | Thomson Licensing S.A. | Local oscillator frequency correction in an orthogonal frequency division multiplexing system |
DE10008653A1 (de) | 2000-02-24 | 2001-09-06 | Siemens Ag | Verbesserungen an einem Funkkommunikationssystem |
US6956814B1 (en) | 2000-02-29 | 2005-10-18 | Worldspace Corporation | Method and apparatus for mobile platform reception and synchronization in direct digital satellite broadcast system |
JP2001244879A (ja) | 2000-03-02 | 2001-09-07 | Matsushita Electric Ind Co Ltd | 送信電力制御装置及びその方法 |
US6963546B2 (en) | 2000-03-15 | 2005-11-08 | Interdigital Technology Corp. | Multi-user detection using an adaptive combination of joint detection and successive interface cancellation |
US7149253B2 (en) * | 2000-03-21 | 2006-12-12 | Texas Instruments Incorporated | Wireless communication |
US20020154705A1 (en) | 2000-03-22 | 2002-10-24 | Walton Jay R. | High efficiency high performance communications system employing multi-carrier modulation |
US6952454B1 (en) | 2000-03-22 | 2005-10-04 | Qualcomm, Incorporated | Multiplexing of real time services and non-real time services for OFDM systems |
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 |
DE10014676C2 (de) | 2000-03-24 | 2002-02-07 | Polytrax Inf Technology Ag | Datenübertragung über ein Stromversorgungsnetz |
US7113499B2 (en) | 2000-03-29 | 2006-09-26 | Texas Instruments Incorporated | Wireless communication |
ES2286964T3 (es) | 2000-04-04 | 2007-12-16 | Sony Deutschland Gmbh | Cambio de clase de servicio de acceso en una canal aleatorio, provocado por un evento. |
ATE301350T1 (de) | 2000-04-07 | 2005-08-15 | Nokia Corp | Verfahren und vorrichtung zur übertragung mit mehreren antennen |
US7289570B2 (en) | 2000-04-10 | 2007-10-30 | Texas Instruments Incorporated | Wireless communications |
US6757263B1 (en) | 2000-04-13 | 2004-06-29 | Motorola, Inc. | Wireless repeating subscriber units |
AU2001257081A1 (en) | 2000-04-18 | 2001-10-30 | Aware, Inc. | Data allocation with variable SNR margins |
US6751199B1 (en) | 2000-04-24 | 2004-06-15 | Qualcomm Incorporated | Method and apparatus for a rate control in a high data rate communication system |
DE60024502T2 (de) | 2000-04-25 | 2006-08-24 | Nortel Networks Ltd., St. Laurent | Drahtloses Telekommunikationssystem mit einer reduzierten Verzögerung für die Datenübermittlung |
JP3414357B2 (ja) | 2000-04-25 | 2003-06-09 | 日本電気株式会社 | Cdma移動通信システムにおける送信電力制御方式 |
US7068628B2 (en) | 2000-05-22 | 2006-06-27 | At&T Corp. | MIMO OFDM system |
US7139324B1 (en) | 2000-06-02 | 2006-11-21 | Nokia Networks Oy | Closed loop feedback system for improved down link performance |
WO2001097411A1 (en) | 2000-06-12 | 2001-12-20 | Samsung Electronics Co., Ltd | Method of assigning an uplink random access channel in a cdma mobile communication system |
US6744811B1 (en) * | 2000-06-12 | 2004-06-01 | Actelis Networks Inc. | Bandwidth management for DSL modem pool |
US7248841B2 (en) | 2000-06-13 | 2007-07-24 | Agee Brian G | Method and apparatus for optimization of wireless multipoint electromagnetic communication networks |
US6628702B1 (en) | 2000-06-14 | 2003-09-30 | Qualcomm, Incorporated | Method and apparatus for demodulating signals processed in a transmit diversity mode |
US6760313B1 (en) | 2000-06-19 | 2004-07-06 | Qualcomm Incorporated | Method and apparatus for adaptive rate selection in a communication system |
SE519303C2 (sv) | 2000-06-20 | 2003-02-11 | Ericsson Telefon Ab L M | Anordning för smalbandig kommunikation i ett multicarrier- system |
US6891858B1 (en) | 2000-06-30 | 2005-05-10 | Cisco Technology Inc. | Dynamic modulation of modulation profiles for communication channels in an access network |
WO2002003557A1 (en) | 2000-06-30 | 2002-01-10 | Iospan Wireless, Inc. | Method and system for mode adaptation in wireless communication |
CN1140147C (zh) | 2000-07-01 | 2004-02-25 | 信息产业部电信传输研究所 | 一种外环功率控制的方法和系统 |
WO2002003573A1 (fr) | 2000-07-03 | 2002-01-10 | Matsushita Electric Industrial Co., Ltd. | Unite de station de base et procede de radiocommunication |
KR100627188B1 (ko) | 2000-07-04 | 2006-09-22 | 에스케이 텔레콤주식회사 | 무선통신 역방향 동기 방식에서의 코드 할당 방법 |
EP1720277B1 (en) | 2000-07-05 | 2017-09-27 | Sony Deutschland Gmbh | Pilot pattern design for multiple antennas in an OFDM system |
BR0112403A (pt) | 2000-07-12 | 2006-05-09 | Qualcomm Inc | multiplexação de serviços em tempo real e serviços em tempo não real para sistemas ofdm |
FI109393B (fi) | 2000-07-14 | 2002-07-15 | Nokia Corp | Menetelmä mediavirran enkoodaamiseksi skaalautuvasti, skaalautuva enkooderi ja päätelaite |
KR100834019B1 (ko) | 2000-07-17 | 2008-06-02 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 인코딩된 데이터 스트림을 송신하기 위한 방법과 송신기 및 인코딩된 데이터 스트림을 수신하기 위한 방법과 수신기 |
KR100493152B1 (ko) | 2000-07-21 | 2005-06-02 | 삼성전자주식회사 | 이동 통신 시스템에서의 전송 안테나 다이버시티 방법 및이를 위한 기지국 장치 및 이동국 장치 |
EP1176750A1 (en) | 2000-07-25 | 2002-01-30 | Telefonaktiebolaget L M Ericsson (Publ) | Link quality determination of a transmission link in an OFDM transmission system |
EP1178641B1 (en) | 2000-08-01 | 2007-07-25 | Sony Deutschland GmbH | Frequency reuse scheme for OFDM systems |
DE60141613D1 (de) * | 2000-08-03 | 2010-04-29 | Infineon Technologies Ag | Konfigurierbarer Modulator |
US6920192B1 (en) | 2000-08-03 | 2005-07-19 | Lucent Technologies Inc. | Adaptive antenna array methods and apparatus for use in a multi-access wireless communication system |
US6582088B2 (en) | 2000-08-10 | 2003-06-24 | Benq Corporation | Optical path folding apparatus |
EP1612966B1 (en) | 2000-08-10 | 2007-12-12 | Fujitsu Limited | Transmitting diversity communications apparatus |
EP1182799A3 (en) | 2000-08-22 | 2002-06-26 | Lucent Technologies Inc. | Method for enhancing mobile cdma communications using space-time transmit diversity |
KR100526499B1 (ko) | 2000-08-22 | 2005-11-08 | 삼성전자주식회사 | 두 개 이상 안테나를 사용하는 안테나 전송 다이버시티방법 및 장치 |
JP3886709B2 (ja) | 2000-08-29 | 2007-02-28 | 三菱電機株式会社 | スペクトル拡散受信装置 |
IT1318790B1 (it) | 2000-08-29 | 2003-09-10 | Cit Alcatel | Metodo per gestire il cambio di allocazione dei time-slot in reti adanello ms-spring di tipo transoceanico. |
US6937592B1 (en) | 2000-09-01 | 2005-08-30 | Intel Corporation | Wireless communications system that supports multiple modes of operation |
US6985434B2 (en) | 2000-09-01 | 2006-01-10 | Nortel Networks Limited | Adaptive time diversity and spatial diversity for OFDM |
US7233625B2 (en) | 2000-09-01 | 2007-06-19 | Nortel Networks Limited | Preamble design for multiple input—multiple output (MIMO), orthogonal frequency division multiplexing (OFDM) system |
US7009931B2 (en) | 2000-09-01 | 2006-03-07 | Nortel Networks Limited | Synchronization in a multiple-input/multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system for wireless applications |
JP2002077098A (ja) | 2000-09-01 | 2002-03-15 | Mitsubishi Electric Corp | 通信装置および通信方法 |
US6850481B2 (en) | 2000-09-01 | 2005-02-01 | Nortel Networks Limited | Channels estimation for multiple input—multiple output, orthogonal frequency division multiplexing (OFDM) system |
FR2814014B1 (fr) | 2000-09-14 | 2002-10-11 | Mitsubishi Electric Inf Tech | Methode de detection multi-utilisateur |
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 |
US6650714B2 (en) * | 2000-11-30 | 2003-11-18 | Arraycomm, Inc. | Spatial processing and timing estimation using a training sequence in a radio communications system |
US7062294B1 (en) | 2000-09-29 | 2006-06-13 | Arraycomm, Llc. | Downlink transmission in a wireless data communication system having a base station with a smart antenna system |
US7110378B2 (en) | 2000-10-03 | 2006-09-19 | Wisconsin Alumni Research Foundation | Channel aware optimal space-time signaling for wireless communication over wideband multipath channels |
US7016296B2 (en) | 2000-10-16 | 2006-03-21 | Broadcom Corporation | Adaptive modulation for fixed wireless link in cable transmission system |
US6907270B1 (en) | 2000-10-23 | 2005-06-14 | Qualcomm Inc. | Method and apparatus for reduced rank channel estimation in a communications system |
US6369758B1 (en) * | 2000-11-01 | 2002-04-09 | Unique Broadband Systems, Inc. | Adaptive antenna array for mobile communication |
JP3553038B2 (ja) | 2000-11-06 | 2004-08-11 | 株式会社エヌ・ティ・ティ・ドコモ | 信号送信方法、信号受信方法、送信装置、受信装置および記録媒体 |
US6768727B1 (en) | 2000-11-09 | 2004-07-27 | Ericsson Inc. | Fast forward link power control for CDMA system |
US8634481B1 (en) | 2000-11-16 | 2014-01-21 | Alcatel Lucent | Feedback technique for wireless systems with multiple transmit and receive antennas |
US7006464B1 (en) | 2000-11-17 | 2006-02-28 | Lucent Technologies Inc. | Downlink and uplink channel structures for downlink shared channel system |
US6980601B2 (en) * | 2000-11-17 | 2005-12-27 | Broadcom Corporation | Rate adaptation and parameter optimization for multi-band single carrier transmission |
JP3695316B2 (ja) | 2000-11-24 | 2005-09-14 | 株式会社日本自動車部品総合研究所 | スペクトラム拡散受信機の相関検出器 |
US6751480B2 (en) | 2000-12-01 | 2004-06-15 | Lucent Technologies Inc. | Method for simultaneously conveying information to multiple mobiles with multiple antennas |
JP4505677B2 (ja) | 2000-12-06 | 2010-07-21 | ソフトバンクテレコム株式会社 | 送信ダイバーシチ装置および送信電力調整方法 |
US6952426B2 (en) | 2000-12-07 | 2005-10-04 | Nortel Networks Limited | Method and apparatus for the transmission of short data bursts in CDMA/HDR networks |
KR100353641B1 (ko) | 2000-12-21 | 2002-09-28 | 삼성전자 주식회사 | 부호분할다중접속 이동통신시스템의 기지국 전송 안테나다이버시티 장치 및 방법 |
US6850498B2 (en) | 2000-12-22 | 2005-02-01 | Intel Corporation | Method and system for evaluating a wireless link |
US7050510B2 (en) | 2000-12-29 | 2006-05-23 | Lucent Technologies Inc. | Open-loop diversity technique for systems employing four transmitter antennas |
US20020085641A1 (en) | 2000-12-29 | 2002-07-04 | Motorola, Inc | Method and system for interference averaging in a wireless communication system |
US6987819B2 (en) | 2000-12-29 | 2006-01-17 | Motorola, Inc. | Method and device for multiple input/multiple output transmit and receive weights for equal-rate data streams |
US6731668B2 (en) | 2001-01-05 | 2004-05-04 | Qualcomm Incorporated | Method and system for increased bandwidth efficiency in multiple input—multiple output channels |
EP1223776A1 (en) | 2001-01-12 | 2002-07-17 | Siemens Information and Communication Networks S.p.A. | A collision free access scheduling in cellular TDMA-CDMA networks |
US6693992B2 (en) | 2001-01-16 | 2004-02-17 | Mindspeed Technologies | Line probe signal and method of use |
US6801790B2 (en) | 2001-01-17 | 2004-10-05 | Lucent Technologies Inc. | Structure for multiple antenna configurations |
US7164669B2 (en) | 2001-01-19 | 2007-01-16 | Adaptix, Inc. | Multi-carrier communication with time division multiplexing and carrier-selective loading |
US7054662B2 (en) | 2001-01-24 | 2006-05-30 | Qualcomm, Inc. | Method and system for forward link beam forming in wireless communications |
JP2002232943A (ja) | 2001-01-29 | 2002-08-16 | Sony Corp | データ送信処理方法、データ受信処理方法、送信機、受信機、およびセルラー無線通信システム |
GB0102316D0 (en) | 2001-01-30 | 2001-03-14 | Koninkl Philips Electronics Nv | Radio communication system |
US6961388B2 (en) | 2001-02-01 | 2005-11-01 | Qualcomm, Incorporated | Coding scheme for a wireless communication system |
US6885654B2 (en) | 2001-02-06 | 2005-04-26 | Interdigital Technology Corporation | Low complexity data detection using fast fourier transform of channel correlation matrix |
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 |
US7006483B2 (en) | 2001-02-23 | 2006-02-28 | Ipr Licensing, Inc. | Qualifying available reverse link coding rates from access channel power setting |
AU2002240506A1 (en) | 2001-02-26 | 2002-09-12 | Magnolia Broadband, Inc | Smart antenna based spectrum multiplexing using a pilot signal |
GB0105019D0 (en) | 2001-03-01 | 2001-04-18 | Koninkl Philips Electronics Nv | Antenna diversity in a wireless local area network |
US7039125B2 (en) | 2001-03-12 | 2006-05-02 | Analog Devices, Inc. | Equalized SNR power back-off |
EP1241824A1 (en) | 2001-03-14 | 2002-09-18 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Multiplexing method in a multicarrier transmit diversity system |
US6763244B2 (en) * | 2001-03-15 | 2004-07-13 | Qualcomm Incorporated | Method and apparatus for adjusting power control setpoint in a wireless communication system |
US7046746B1 (en) * | 2001-03-19 | 2006-05-16 | Cisco Systems Wireless Networking (Australia) Pty Limited | Adaptive Viterbi decoder for a wireless data network receiver |
US6478422B1 (en) | 2001-03-19 | 2002-11-12 | Richard A. Hansen | Single bifocal custom shooters glasses |
US7248638B1 (en) | 2001-03-23 | 2007-07-24 | Lsi Logic | Transmit antenna multi-mode tracking |
US6771706B2 (en) | 2001-03-23 | 2004-08-03 | Qualcomm Incorporated | Method and apparatus for utilizing channel state information in a wireless communication system |
US7386076B2 (en) | 2001-03-29 | 2008-06-10 | Texas Instruments Incorporated | Space time encoded wireless communication system with multipath resolution receivers |
GB2373973B (en) | 2001-03-30 | 2003-06-11 | Toshiba Res Europ Ltd | Adaptive antenna |
US8290098B2 (en) | 2001-03-30 | 2012-10-16 | Texas Instruments Incorporated | Closed loop multiple transmit, multiple receive antenna wireless communication system |
US20020176485A1 (en) | 2001-04-03 | 2002-11-28 | Hudson John E. | Multi-cast communication system and method of estimating channel impulse responses therein |
US6785513B1 (en) | 2001-04-05 | 2004-08-31 | Cowave Networks, Inc. | Method and system for clustered wireless networks |
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 |
KR100510434B1 (ko) | 2001-04-09 | 2005-08-26 | 니폰덴신뎅와 가부시키가이샤 | Ofdm신호전달 시스템, ofdm신호 송신장치 및ofdm신호 수신장치 |
FR2823620B1 (fr) | 2001-04-12 | 2003-08-15 | France Telecom | Procede de codage/decodage d'un flux de donnees numeriques codees avec entrelacement sur bits en emission et en reception multiple en presence d'interference intersymboles et systeme correspondant |
US7310304B2 (en) | 2001-04-24 | 2007-12-18 | Bae Systems Information And Electronic Systems Integration Inc. | Estimating channel parameters in multi-input, multi-output (MIMO) systems |
GB0110223D0 (en) | 2001-04-26 | 2001-06-20 | Sensor Highway Ltd | Method and apparatus for leak detection and location |
US6611231B2 (en) | 2001-04-27 | 2003-08-26 | Vivato, Inc. | Wireless packet switched communication systems and networks using adaptively steered antenna arrays |
US7133459B2 (en) | 2001-05-01 | 2006-11-07 | Texas Instruments Incorporated | Space-time transmit diversity |
EP1255369A1 (en) | 2001-05-04 | 2002-11-06 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Link adaptation for wireless MIMO transmission schemes |
DE60141717D1 (de) | 2001-05-04 | 2010-05-12 | Nokia Corp | Zulassungssteuerung durch richtantenne |
DE10122788A1 (de) | 2001-05-10 | 2002-06-06 | Basf Ag | Verfahren der kristallisativen Reinigung einer Roh-Schmelze wenigstens eines Monomeren |
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 |
US7072413B2 (en) * | 2001-05-17 | 2006-07-04 | Qualcomm, Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
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 |
US7688899B2 (en) | 2001-05-17 | 2010-03-30 | Qualcomm Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
US6718493B1 (en) * | 2001-05-17 | 2004-04-06 | 3Com Corporation | Method and apparatus for selection of ARQ parameters and estimation of improved communications |
US7492737B1 (en) | 2001-05-23 | 2009-02-17 | Nortel Networks Limited | Service-driven air interface protocol architecture for wireless systems |
ES2188373B1 (es) * | 2001-05-25 | 2004-10-16 | Diseño De Sistemas En Silencio, S.A. | Procedimiento de optimizacion de la comunicacion para sistema de transmision digital ofdm multiusuario sobre red electrica. |
US6920194B2 (en) | 2001-05-29 | 2005-07-19 | Tioga Technologies, Ltd. | Method and system for detecting, timing, and correcting impulse noise |
US7158563B2 (en) | 2001-06-01 | 2007-01-02 | The Board Of Trustees Of The Leland Stanford Junior University | Dynamic digital communication system control |
GB2376315B (en) | 2001-06-05 | 2003-08-06 | 3Com Corp | Data bus system including posted reads and writes |
US20020183010A1 (en) | 2001-06-05 | 2002-12-05 | Catreux Severine E. | Wireless communication systems with adaptive channelization and link adaptation |
US20020193146A1 (en) | 2001-06-06 | 2002-12-19 | Mark Wallace | Method and apparatus for antenna diversity in a wireless communication system |
US7190749B2 (en) | 2001-06-06 | 2007-03-13 | Qualcomm Incorporated | Method and apparatus for canceling pilot interference in a wireless communication system |
EP1265411B1 (en) | 2001-06-08 | 2007-04-18 | Sony Deutschland GmbH | Multicarrier system with adaptive bit-wise interleaving |
US20030012308A1 (en) | 2001-06-13 | 2003-01-16 | Sampath Hemanth T. | Adaptive channel estimation for wireless systems |
US7027523B2 (en) | 2001-06-22 | 2006-04-11 | Qualcomm Incorporated | Method and apparatus for transmitting data in a time division duplexed (TDD) communication system |
US6842460B1 (en) * | 2001-06-27 | 2005-01-11 | Nokia Corporation | Ad hoc network discovery menu |
CN1547861A (zh) | 2001-06-27 | 2004-11-17 | ���˹���Ѷ��� | 无线通信系统中控制信息的传递 |
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 |
EP1413640B1 (en) | 2001-07-05 | 2005-05-25 | Nisshin Steel Co., Ltd. | Ferritic stainless steel for member of exhaust gas flow passage |
FR2827731B1 (fr) | 2001-07-23 | 2004-01-23 | Nexo | Haut-parleur a radiation directe et rayonnement optimise |
US6996380B2 (en) | 2001-07-26 | 2006-02-07 | Ericsson Inc. | Communication system employing transmit macro-diversity |
US6738020B1 (en) | 2001-07-31 | 2004-05-18 | Arraycomm, Inc. | Estimation of downlink transmission parameters in a radio communications system with an adaptive antenna array |
EP1284545B1 (en) | 2001-08-13 | 2008-07-02 | Motorola, Inc. | Transmit diversity wireless communication |
KR100703295B1 (ko) | 2001-08-18 | 2007-04-03 | 삼성전자주식회사 | 이동통신시스템에서 안테나 어레이를 이용한 데이터 송/수신 장치 및 방법 |
US20030039317A1 (en) * | 2001-08-21 | 2003-02-27 | Taylor Douglas Hamilton | Method and apparatus for constructing a sub-carrier map |
FR2828981B1 (fr) | 2001-08-23 | 2004-05-21 | Commissariat Energie Atomique | Creuset a chauffage par induction et refroidissement par caloducs |
EP1289328A1 (en) | 2001-08-28 | 2003-03-05 | Lucent Technologies Inc. | A method of sending control information in a wireless telecommunications network, and corresponding apparatus |
US6990059B1 (en) | 2001-09-05 | 2006-01-24 | Cisco Technology, Inc. | Interference mitigation in a wireless communication system |
FR2829326A1 (fr) | 2001-09-06 | 2003-03-07 | France Telecom | Procede et systeme de reception iterative sous optimale pour systeme de transmission haut debit cdma |
US7149254B2 (en) | 2001-09-06 | 2006-12-12 | Intel Corporation | Transmit signal preprocessing based on transmit antennae correlations for multiple antennae systems |
US7133070B2 (en) | 2001-09-20 | 2006-11-07 | Eastman Kodak Company | System and method for deciding when to correct image-specific defects based on camera, scene, display and demographic data |
US6788948B2 (en) | 2001-09-28 | 2004-09-07 | Arraycomm, Inc. | Frequency dependent calibration of a wideband radio system using narrowband channels |
US7024163B1 (en) * | 2001-09-28 | 2006-04-04 | Arraycomm Llc | Method and apparatus for adjusting feedback of a remote unit |
US7277679B1 (en) * | 2001-09-28 | 2007-10-02 | Arraycomm, Llc | Method and apparatus to provide multiple-mode spatial processing to a terminal unit |
US7035359B2 (en) | 2001-10-11 | 2006-04-25 | Telefonaktiebolaget L.M. Ericsson | Methods and apparatus for demodulation of a signal in a signal slot subject to a discontinuous interference signal |
US7248559B2 (en) * | 2001-10-17 | 2007-07-24 | Nortel Networks Limited | Scattered pilot pattern and channel estimation method for MIMO-OFDM systems |
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 |
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 |
KR20030032875A (ko) | 2001-10-19 | 2003-04-26 | 삼성전자주식회사 | 멀티캐스트 멀티미디어 방송 서비스를 제공하는 이동 통신시스템에서 순방향 데이터 채널 송신 전력을 제어하는장치 및 방법 |
JP3607238B2 (ja) | 2001-10-22 | 2005-01-05 | 株式会社東芝 | Ofdm信号受信システム |
EP1363410A4 (en) | 2001-10-31 | 2010-10-20 | Panasonic Corp | RADIO TRANSMISSION DEVICE AND RADIO COMMUNICATION METHOD |
US7218684B2 (en) | 2001-11-02 | 2007-05-15 | Interdigital Technology Corporation | Method and system for code reuse and capacity enhancement using null steering |
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 |
US8018903B2 (en) | 2001-11-21 | 2011-09-13 | Texas Instruments Incorporated | Closed-loop transmit diversity scheme in frequency selective multipath channels |
US7346126B2 (en) | 2001-11-28 | 2008-03-18 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for channel estimation using plural channels |
US7263119B1 (en) | 2001-11-29 | 2007-08-28 | Marvell International Ltd. | Decoding method and apparatus |
US7154936B2 (en) * | 2001-12-03 | 2006-12-26 | Qualcomm, Incorporated | Iterative detection and decoding for a MIMO-OFDM system |
US6760388B2 (en) | 2001-12-07 | 2004-07-06 | Qualcomm Incorporated | Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems |
US7155171B2 (en) | 2001-12-12 | 2006-12-26 | Saraband Wireless | Vector network analyzer applique for adaptive communications in wireless networks |
US20030112745A1 (en) | 2001-12-17 | 2003-06-19 | Xiangyang Zhuang | Method and system of operating a coded OFDM communication system |
US20030202612A1 (en) | 2001-12-18 | 2003-10-30 | Bijit Halder | Method and system for rate enhanced SHDSL |
US7099398B1 (en) | 2001-12-18 | 2006-08-29 | Vixs, Inc. | Method and apparatus for establishing non-standard data rates in a wireless communication system |
US7573805B2 (en) | 2001-12-28 | 2009-08-11 | Motorola, Inc. | Data transmission and reception method and apparatus |
JP4052835B2 (ja) | 2001-12-28 | 2008-02-27 | 株式会社日立製作所 | 多地点中継を行う無線伝送システム及びそれに使用する無線装置 |
CA2366397A1 (en) | 2001-12-31 | 2003-06-30 | Tropic Networks Inc. | An interface for data transfer between integrated circuits |
US7209433B2 (en) | 2002-01-07 | 2007-04-24 | Hitachi, Ltd. | Channel estimation and compensation techniques for use in frequency division multiplexed systems |
US7020110B2 (en) | 2002-01-08 | 2006-03-28 | Qualcomm Incorporated | Resource allocation for MIMO-OFDM communication systems |
US7020482B2 (en) | 2002-01-23 | 2006-03-28 | Qualcomm Incorporated | Reallocation of excess power for full channel-state information (CSI) multiple-input, multiple-output (MIMO) systems |
US7058116B2 (en) * | 2002-01-25 | 2006-06-06 | Intel Corporation | Receiver architecture for CDMA receiver downlink |
US7283508B2 (en) | 2002-02-07 | 2007-10-16 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting/receiving serving HS-SCCH set information in an HSDPA communication system |
US7046978B2 (en) | 2002-02-08 | 2006-05-16 | Qualcomm, Inc. | Method and apparatus for transmit pre-correction in wireless communications |
US6980800B2 (en) | 2002-02-12 | 2005-12-27 | Hughes Network Systems | System and method for providing contention channel organization for broadband satellite access in a communications network |
US7292854B2 (en) | 2002-02-15 | 2007-11-06 | Lucent Technologies Inc. | Express signaling in a wireless communication system |
US7076263B2 (en) | 2002-02-19 | 2006-07-11 | Qualcomm, Incorporated | Power control for partial channel-state information (CSI) multiple-input, multiple-output (MIMO) systems |
US6862271B2 (en) | 2002-02-26 | 2005-03-01 | Qualcomm Incorporated | Multiple-input, multiple-output (MIMO) systems with multiple transmission modes |
US20030162519A1 (en) | 2002-02-26 | 2003-08-28 | Martin Smith | Radio communications device |
US6959171B2 (en) * | 2002-02-28 | 2005-10-25 | Intel Corporation | Data transmission rate control |
US6687492B1 (en) | 2002-03-01 | 2004-02-03 | Cognio, Inc. | System and method for antenna diversity using joint maximal ratio combining |
US6873651B2 (en) | 2002-03-01 | 2005-03-29 | Cognio, Inc. | System and method for joint maximal ratio combining using time-domain signal processing |
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 |
US7042858B1 (en) * | 2002-03-22 | 2006-05-09 | Jianglei Ma | Soft handoff for OFDM |
JP3561510B2 (ja) | 2002-03-22 | 2004-09-02 | 松下電器産業株式会社 | 基地局装置及びパケット伝送方法 |
US7012978B2 (en) | 2002-03-26 | 2006-03-14 | Intel Corporation | Robust multiple chain receiver |
US20040198276A1 (en) | 2002-03-26 | 2004-10-07 | Jose Tellado | Multiple channel wireless receiver |
US7197084B2 (en) | 2002-03-27 | 2007-03-27 | Qualcomm Incorporated | Precoding for a multipath channel in a MIMO system |
KR100456693B1 (ko) * | 2002-03-28 | 2004-11-10 | 삼성전자주식회사 | 다중채널 통신 시스템의 비트 할당을 최적화하여 셋업시간을 최소화하는 방법 |
US20030186650A1 (en) * | 2002-03-29 | 2003-10-02 | Jung-Tao Liu | Closed loop multiple antenna system |
US7224704B2 (en) | 2002-04-01 | 2007-05-29 | Texas Instruments Incorporated | Wireless network scheduling data frames including physical layer configuration |
US7099377B2 (en) | 2002-04-03 | 2006-08-29 | Stmicroelectronics N.V. | Method and device for interference cancellation in a CDMA wireless communication system |
US6850741B2 (en) * | 2002-04-04 | 2005-02-01 | Agency For Science, Technology And Research | Method for selecting switched orthogonal beams for downlink diversity transmission |
US7103325B1 (en) | 2002-04-05 | 2006-09-05 | Nortel Networks Limited | Adaptive modulation and coding |
WO2003088540A1 (en) | 2002-04-05 | 2003-10-23 | Flarion Technologies, Inc. | Phase sequences for timing and access signals |
US7623871B2 (en) | 2002-04-24 | 2009-11-24 | Qualcomm Incorporated | Position determination for a wireless terminal in a hybrid position determination system |
US7876726B2 (en) | 2002-04-29 | 2011-01-25 | Texas Instruments Incorporated | Adaptive allocation of communications link channels to I- or Q-subchannel |
US6690660B2 (en) | 2002-05-22 | 2004-02-10 | Interdigital Technology Corporation | Adaptive algorithm for a Cholesky approximation |
US7327800B2 (en) | 2002-05-24 | 2008-02-05 | Vecima Networks Inc. | System and method for data detection in wireless communication systems |
US6862440B2 (en) | 2002-05-29 | 2005-03-01 | Intel Corporation | Method and system for multiple channel wireless transmitter and receiver phase and amplitude calibration |
US7421039B2 (en) | 2002-06-04 | 2008-09-02 | Lucent Technologies Inc. | Method and system employing antenna arrays |
KR100498326B1 (ko) | 2002-06-18 | 2005-07-01 | 엘지전자 주식회사 | 이동통신 단말기의 적응 변조 코딩 장치 및 방법 |
US7184713B2 (en) | 2002-06-20 | 2007-02-27 | Qualcomm, Incorporated | Rate control for multi-channel communication systems |
US7613248B2 (en) | 2002-06-24 | 2009-11-03 | Qualcomm Incorporated | Signal processing with channel eigenmode decomposition and channel inversion for MIMO systems |
US7095709B2 (en) | 2002-06-24 | 2006-08-22 | Qualcomm, Incorporated | Diversity transmission modes for MIMO OFDM communication systems |
US7359313B2 (en) | 2002-06-24 | 2008-04-15 | Agere Systems Inc. | Space-time bit-interleaved coded modulation for wideband transmission |
DK1520360T3 (da) | 2002-06-27 | 2007-04-30 | Koninkl Philips Electronics Nv | Måling af kanalkarakteristikker i et kommunikationssystem |
US7551546B2 (en) | 2002-06-27 | 2009-06-23 | Nortel Networks Limited | Dual-mode shared OFDM methods/transmitters, receivers and systems |
US7342912B1 (en) | 2002-06-28 | 2008-03-11 | Arraycomm, Llc. | Selection of user-specific transmission parameters for optimization of transmit performance in wireless communications using a common pilot channel |
US20040071199A1 (en) | 2002-07-03 | 2004-04-15 | Commasic, Inc. | Virtual finger method and apparatus for processing digital communication signals |
EP1379020A1 (en) | 2002-07-03 | 2004-01-07 | National University Of Singapore | A wireless communication apparatus and method |
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 |
US6683916B1 (en) | 2002-07-17 | 2004-01-27 | Philippe Jean-Marc Sartori | Adaptive modulation/coding and power allocation system |
US6885708B2 (en) | 2002-07-18 | 2005-04-26 | Motorola, Inc. | Training prefix modulation method and receiver |
KR20040011653A (ko) | 2002-07-29 | 2004-02-11 | 삼성전자주식회사 | 채널 특성에 적응적인 직교 주파수 분할 다중 통신 방법및 장치 |
SG165163A1 (en) | 2002-07-30 | 2010-10-28 | Ipr Licensing Inc | System and method for multiple-input multiple-output(mimo)radio communication |
US6961595B2 (en) * | 2002-08-08 | 2005-11-01 | Flarion Technologies, Inc. | Methods and apparatus for operating mobile nodes in multiple states |
US7653415B2 (en) | 2002-08-21 | 2010-01-26 | Broadcom Corporation | Method and system for increasing data rate in a mobile terminal using spatial multiplexing for DVB-H communication |
US6970722B1 (en) * | 2002-08-22 | 2005-11-29 | Cisco Technology, Inc. | Array beamforming with wide nulls |
DE60325921D1 (de) | 2002-08-22 | 2009-03-12 | Imec Inter Uni Micro Electr | Verfahren zur MIMO-Übertragung für mehrere Benutzer und entsprechende Vorrichtungen |
US20040037257A1 (en) | 2002-08-23 | 2004-02-26 | Koninklijke Philips Electronics N.V. | Method and apparatus for assuring quality of service in wireless local area networks |
US6940917B2 (en) | 2002-08-27 | 2005-09-06 | Qualcomm, Incorporated | Beam-steering and beam-forming for wideband MIMO/MISO systems |
US8194770B2 (en) | 2002-08-27 | 2012-06-05 | Qualcomm Incorporated | Coded MIMO systems with selective channel inversion applied per eigenmode |
EP1535410A1 (en) | 2002-09-06 | 2005-06-01 | Nokia Corporation | Antenna selection method |
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 |
US20040052228A1 (en) | 2002-09-16 | 2004-03-18 | Jose Tellado | Method and system of frequency and time synchronization of a transceiver to signals received by the transceiver |
US8254346B2 (en) * | 2002-09-17 | 2012-08-28 | Broadcom Corporation | Communication system and method for discovering end-points that utilize a link layer connection in a wired/wireless local area network |
US7426176B2 (en) * | 2002-09-30 | 2008-09-16 | Lucent Technologies Inc. | Method of power allocation and rate control in OFDMA systems |
US7961774B2 (en) | 2002-10-15 | 2011-06-14 | Texas Instruments Incorporated | Multipath interference-resistant receivers for closed-loop transmit diversity (CLTD) in code-division multiple access (CDMA) systems |
US6850511B2 (en) | 2002-10-15 | 2005-02-01 | Intech 21, Inc. | Timely organized ad hoc network and protocol for timely organized ad hoc network |
US20040121730A1 (en) * | 2002-10-16 | 2004-06-24 | Tamer Kadous | Transmission scheme for multi-carrier MIMO systems |
US7518997B2 (en) | 2002-10-22 | 2009-04-14 | Texas Instruments Incorporated | Wireless mobile communication stations for operation in non-exclusive spectrum |
US7453844B1 (en) | 2002-10-22 | 2008-11-18 | Hong Kong Applied Science and Technology Research Institute, Co., Ltd. | Dynamic allocation of channels in a wireless network |
US7002900B2 (en) * | 2002-10-25 | 2006-02-21 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US20040081131A1 (en) * | 2002-10-25 | 2004-04-29 | Walton Jay Rod | OFDM communication system with multiple OFDM symbol sizes |
US8570988B2 (en) | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US7324429B2 (en) | 2002-10-25 | 2008-01-29 | Qualcomm, Incorporated | Multi-mode terminal in a wireless MIMO system |
CN1708935B (zh) | 2002-10-25 | 2011-06-22 | 高通股份有限公司 | 用于无线电通信系统的数据检测和解调 |
US8170513B2 (en) * | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
US8218609B2 (en) * | 2002-10-25 | 2012-07-10 | Qualcomm Incorporated | Closed-loop rate control for a multi-channel communication system |
US7151809B2 (en) | 2002-10-25 | 2006-12-19 | Qualcomm, Incorporated | Channel estimation and spatial processing for TDD MIMO systems |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed 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 |
US8320301B2 (en) * | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
US8208364B2 (en) * | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
EP1554831B1 (en) | 2002-10-26 | 2013-05-22 | Electronics and Telecommunications Research Institute | Frequency hopping ofdma method using symbols of comb pattern |
US7317750B2 (en) | 2002-10-31 | 2008-01-08 | Lot 41 Acquisition Foundation, Llc | Orthogonal superposition coding for direct-sequence communications |
EP1416688A1 (en) | 2002-10-31 | 2004-05-06 | Motorola Inc. | Iterative channel estimation in multicarrier receivers |
US7280625B2 (en) | 2002-12-11 | 2007-10-09 | Qualcomm Incorporated | Derivation of eigenvectors for spatial processing in MIMO communication systems |
US7280467B2 (en) | 2003-01-07 | 2007-10-09 | Qualcomm Incorporated | Pilot transmission schemes for wireless multi-carrier communication systems |
US7058367B1 (en) | 2003-01-31 | 2006-06-06 | At&T Corp. | Rate-adaptive methods for communicating over multiple input/multiple output wireless systems |
US7583637B2 (en) * | 2003-01-31 | 2009-09-01 | Alcatel-Lucent Usa Inc. | Methods of controlling data rate in wireless communications systems |
US20040176097A1 (en) | 2003-02-06 | 2004-09-09 | Fiona Wilson | Allocation of sub channels of MIMO channels of a wireless network |
EP1447934A1 (en) | 2003-02-12 | 2004-08-18 | Institut Eurecom G.I.E. | Transmission and reception diversity process for wireless communications |
JP2004266586A (ja) | 2003-03-03 | 2004-09-24 | Hitachi Ltd | 移動通信システムのデータ送受信方法 |
JP4250002B2 (ja) * | 2003-03-05 | 2009-04-08 | 富士通株式会社 | 適応型変調伝送システム及び適応型変調制御方法 |
US6927728B2 (en) | 2003-03-13 | 2005-08-09 | Motorola, Inc. | Method and apparatus for multi-antenna transmission |
US7822140B2 (en) * | 2003-03-17 | 2010-10-26 | Broadcom Corporation | Multi-antenna communication systems utilizing RF-based and baseband signal weighting and combining |
US7885228B2 (en) | 2003-03-20 | 2011-02-08 | Qualcomm Incorporated | Transmission mode selection for data transmission in a multi-channel communication system |
JP4259897B2 (ja) | 2003-03-25 | 2009-04-30 | シャープ株式会社 | 無線データ伝送システム及び無線データ送受信装置 |
US7242727B2 (en) | 2003-03-31 | 2007-07-10 | Lucent Technologies Inc. | Method of determining transmit power for transmit eigenbeams in a multiple-input multiple-output communications system |
US7403503B2 (en) | 2003-07-09 | 2008-07-22 | Interdigital Technology Corporation | Resource allocation in wireless communication systems |
CA2532080A1 (en) | 2003-07-11 | 2005-01-27 | Qualcomm Incorporated | Dynamic shared forward link channel for a wireless communication system |
AU2003255106A1 (en) | 2003-08-08 | 2005-02-25 | Biotechnology Research Institute, Chinese Academy of Agricultural Science | 5-enolpyruvyl-3-phosphoshikimate synthase of high glyphosate-bioresistance and coding sequence |
WO2005022833A2 (en) | 2003-08-27 | 2005-03-10 | Wavion Ltd. | Wlan capacity enhancement using sdm |
US7065144B2 (en) | 2003-08-27 | 2006-06-20 | Qualcomm Incorporated | Frequency-independent spatial processing for wideband MISO and MIMO systems |
US7356089B2 (en) | 2003-09-05 | 2008-04-08 | Nortel Networks Limited | Phase offset spatial multiplexing |
KR100995031B1 (ko) | 2003-10-01 | 2010-11-19 | 엘지전자 주식회사 | 다중입력 다중출력 시스템에 적용되는 신호 전송 제어 방법 |
US8233462B2 (en) | 2003-10-15 | 2012-07-31 | Qualcomm Incorporated | High speed media access control and direct link protocol |
US8842657B2 (en) | 2003-10-15 | 2014-09-23 | Qualcomm Incorporated | High speed media access control with legacy system interoperability |
US8483105B2 (en) | 2003-10-15 | 2013-07-09 | Qualcomm Incorporated | High speed media access control |
EP1678906A1 (en) | 2003-10-24 | 2006-07-12 | QUALCOMM Incorporated | Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system |
US7508748B2 (en) * | 2003-10-24 | 2009-03-24 | Qualcomm Incorporated | Rate selection for a multi-carrier MIMO system |
US7616698B2 (en) | 2003-11-04 | 2009-11-10 | Atheros Communications, Inc. | Multiple-input multiple output system and method |
US7298805B2 (en) | 2003-11-21 | 2007-11-20 | Qualcomm Incorporated | Multi-antenna transmission for spatial division multiple access |
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 |
US7231184B2 (en) | 2003-12-05 | 2007-06-12 | Texas Instruments Incorporated | Low overhead transmit channel estimation |
US7872963B2 (en) | 2003-12-27 | 2011-01-18 | Electronics And Telecommunications Research Institute | MIMO-OFDM system using eigenbeamforming method |
US7333556B2 (en) * | 2004-01-12 | 2008-02-19 | Intel Corporation | System and method for selecting data rates to provide uniform bit loading of subcarriers of a multicarrier communication channel |
JP2005223829A (ja) | 2004-02-09 | 2005-08-18 | Nec Electronics Corp | 分数分周回路及びこれを用いたデータ伝送装置 |
US7206354B2 (en) | 2004-02-19 | 2007-04-17 | Qualcomm Incorporated | Calibration of downlink and uplink channel responses in a wireless MIMO communication system |
US7746886B2 (en) | 2004-02-19 | 2010-06-29 | Broadcom Corporation | Asymmetrical MIMO wireless communications |
US7274734B2 (en) * | 2004-02-20 | 2007-09-25 | Aktino, Inc. | Iterative waterfiling with explicit bandwidth constraints |
US7848442B2 (en) | 2004-04-02 | 2010-12-07 | Lg Electronics Inc. | Signal processing apparatus and method in multi-input/multi-output communications systems |
US7486740B2 (en) | 2004-04-02 | 2009-02-03 | Qualcomm Incorporated | Calibration of transmit and receive chains in a MIMO communication system |
US7110463B2 (en) | 2004-06-30 | 2006-09-19 | Qualcomm, Incorporated | Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system |
US7606319B2 (en) * | 2004-07-15 | 2009-10-20 | Nokia Corporation | Method and detector for a novel channel quality indicator for space-time encoded MIMO spread spectrum systems in frequency selective channels |
US20060018247A1 (en) * | 2004-07-22 | 2006-01-26 | Bas Driesen | Method and apparatus for space interleaved communication in a multiple antenna communication system |
US7599443B2 (en) | 2004-09-13 | 2009-10-06 | Nokia Corporation | Method and apparatus to balance maximum information rate with quality of service in a MIMO system |
KR100905605B1 (ko) * | 2004-09-24 | 2009-07-02 | 삼성전자주식회사 | 직교주파수분할다중화 다중입출력 통신 시스템의 전송 방법 |
TWI296753B (en) | 2004-10-26 | 2008-05-11 | Via Tech Inc | Usb control circuit for saving power and the method thereof |
PT1829262T (pt) * | 2004-11-16 | 2018-05-15 | Qualcomm Inc | Controlo de velocidade em ciclo fechado para um sistema de comunicações mimo |
US8498215B2 (en) * | 2004-11-16 | 2013-07-30 | Qualcomm Incorporated | Open-loop rate control for a TDD communication system |
US7525988B2 (en) * | 2005-01-17 | 2009-04-28 | Broadcom Corporation | Method and system for rate selection algorithm to maximize throughput in closed loop multiple input multiple output (MIMO) wireless local area network (WLAN) system |
US7466749B2 (en) * | 2005-05-12 | 2008-12-16 | Qualcomm Incorporated | Rate selection with margin sharing |
US7603141B2 (en) | 2005-06-02 | 2009-10-13 | Qualcomm, Inc. | Multi-antenna station with distributed antennas |
US8358714B2 (en) * | 2005-06-16 | 2013-01-22 | Qualcomm Incorporated | Coding and modulation for multiple data streams in a communication system |
US20090161613A1 (en) * | 2007-11-30 | 2009-06-25 | Mark Kent | Method and system for constructing channel quality indicator tables for feedback in a communication system |
US20090291642A1 (en) * | 2008-05-23 | 2009-11-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Systems and Methods for SIR Estimation for Power Control |
US8619620B2 (en) | 2008-09-16 | 2013-12-31 | Qualcomm Incorporated | Methods and systems for transmission mode selection in a multi channel communication system |
ES2355347B1 (es) * | 2009-01-30 | 2012-02-10 | Vodafone España, S.A.U. | Método para detectar interferencias en un sistema de comunicación inal�?mbrico. |
US20100260060A1 (en) | 2009-04-08 | 2010-10-14 | Qualcomm Incorporated | Integrated calibration protocol for wireless lans |
-
2005
- 2005-05-12 US US11/128,698 patent/US7466749B2/en not_active Expired - Fee Related
-
2006
- 2006-05-09 EP EP06759443A patent/EP1880491A4/en not_active Withdrawn
- 2006-05-09 KR KR1020077029037A patent/KR100985708B1/ko not_active IP Right Cessation
- 2006-05-09 JP JP2008511293A patent/JP5155154B2/ja not_active Expired - Fee Related
- 2006-05-09 WO PCT/US2006/017992 patent/WO2006124427A2/en active Application Filing
- 2006-05-09 CN CN2006800161191A patent/CN101176276B/zh not_active Expired - Fee Related
-
2008
- 2008-11-13 US US12/270,842 patent/US8855226B2/en not_active Expired - Fee Related
-
2011
- 2011-04-04 JP JP2011083104A patent/JP5301602B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5790550A (en) * | 1995-07-11 | 1998-08-04 | Alcatel Nv | Method for allocating data elements to a set of carriers, mapping unit and modulator to perform this method |
US6072779A (en) * | 1997-06-12 | 2000-06-06 | Aware, Inc. | Adaptive allocation for variable bandwidth multicarrier communication |
CN1416623A (zh) * | 2000-01-12 | 2003-05-07 | 艾利森电话股份有限公司 | Cdma系统中移动台辅助前向链路开环功率和速率控制 |
EP1137217A1 (en) * | 2000-03-20 | 2001-09-26 | Telefonaktiebolaget Lm Ericsson | ARQ parameter negociation in a data packet transmission system using link adaptation |
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WO2006124427A3 (en) | 2007-10-18 |
KR100985708B1 (ko) | 2010-10-06 |
US8855226B2 (en) | 2014-10-07 |
JP5301602B2 (ja) | 2013-09-25 |
JP5155154B2 (ja) | 2013-02-27 |
EP1880491A4 (en) | 2012-01-04 |
US20060256848A1 (en) | 2006-11-16 |
CN101176276A (zh) | 2008-05-07 |
JP2008545294A (ja) | 2008-12-11 |
US7466749B2 (en) | 2008-12-16 |
WO2006124427A2 (en) | 2006-11-23 |
JP2011182420A (ja) | 2011-09-15 |
EP1880491A2 (en) | 2008-01-23 |
KR20080021019A (ko) | 2008-03-06 |
US20090129454A1 (en) | 2009-05-21 |
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