TWI337477B - Multi-mode terminal, access point, and method of processing data in a wireless mimo system - Google Patents

Multi-mode terminal, access point, and method of processing data in a wireless mimo system Download PDF

Info

Publication number
TWI337477B
TWI337477B TW092129577A TW92129577A TWI337477B TW I337477 B TWI337477 B TW I337477B TW 092129577 A TW092129577 A TW 092129577A TW 92129577 A TW92129577 A TW 92129577A TW I337477 B TWI337477 B TW I337477B
Authority
TW
Taiwan
Prior art keywords
mode
spatial
matrix
symbol streams
terminal
Prior art date
Application number
TW092129577A
Other languages
English (en)
Other versions
TW200417187A (en
Inventor
Rodney Walton J
S Wallace Mark
W Ketchum John
J Howard Steven
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of TW200417187A publication Critical patent/TW200417187A/zh
Application granted granted Critical
Publication of TWI337477B publication Critical patent/TWI337477B/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0628—Diversity capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0669—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different channel coding between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0871—Hybrid systems, i.e. switching and combining using different reception schemes, at least one of them being a diversity reception scheme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
    • H04L25/0248—Eigen-space methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03891—Spatial equalizers
    • H04L25/03949—Spatial equalizers equalizer selection or adaptation based on feedback
    • H04L25/03955—Spatial equalizers equalizer selection or adaptation based on feedback in combination with downlink estimations, e.g. downlink path losses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0028—Variable division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/0256—Channel estimation using minimum mean square error criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03891—Spatial equalizers
    • H04L25/03961—Spatial equalizers design criteria
    • H04L25/03968—Spatial equalizers design criteria mean-square error [MSE]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
  • Error Detection And Correction (AREA)

Description

1337477 玫、發明說明： 【發明所屬之技術領域】 本發明大致係有關於通信，而明確而言，係有關在一多 輸入多輸出（ΜΙΜΟ)通信系統中的一使用者端子。 【先前技術】 本專利申清疋在2002年1 〇月25申請的暫時專利申請案 號 60/421,309，名稱” ΜΙΜΟ WLAN System1，，其已讓與本 發明之受讓人，而且在此是以引用方式併入本文。 一多輸入多輸出系統係使用供資料傳輸之多重（Λ^)傳 运天線與多重（馬）接收天線，而且是以一（Λ^、系統表 示。透過％傳送與％接收天線形成的一多輸入多輸出頻道 可分解成^個空間頻道，其中卜馬個空間 頻道可用來傳送％個獨立的資料流，以達成較大的整體輸 出量。大體上，空間處理能夠或不可在一發射器執行，且 正常是在一接收器執行，以同時傳送及復原多重資料流。 一傳統多輸入多輸出系統典型係使用一特 來同時傳送多重資料流。此傳送方法係根據例 求、從接收器到發射器的回授量、發射器與接收器能力等 的各種不同因素的優缺點取捨而選取。發射器、接收。。 與系統然後設計成根據選取的傳送方法而支援及操作。 傳送方法典型具有利特徵及影響系統效率的不利:些。此 因此在此技術中需要可達成改良效率之使用者端= 【發明内容】 可支援改良效率與較大彈性的多重介n 二間多工（SM)模式
〇Λ88\88946 DOC -6- 之使用者端子將在此描述。空間多工可視為經由一多輸入 多輸出頻道的多重空間頻道的多重資料流的同時傳送。多 重s Μ模式包括：（1) 一引導模式’以在正交空間頻道上傳 送多重資料流及（2) —非引導模式，以傳送來自多重天線的 多重資料流。 端子可選取一 SM模式用於來自多重支援s Μ模式的資料 傳輸。SM模式選擇是根據各種不同因素，例如端子的校 準狀態、傳送資料量、頻道狀態、其他通信實體能力等。 對於資料傳送而言’多重資料流能根據其選取資料率而編 碼及調變’以獲得多重資料符號流。這些資料符號流然後 根據選取的SM模式而予以空間處理，以獲得多重傳送符 號流。傳送空間處理是使用引導模式的一引導向量矩降與 使用非引導模式的一單位矩陣。傳送符號流是從多重天線 及經由一第一通信鏈路（例如，上行鏈路）傳送。 對於資料接收而言，一第二通信鏈路（例如，下行鏈路） 的多重接收符號流係根據選取的SM模式而予以空間處 理，以獲得多重復原的資料符號流。接收空間處理係根據 用於引導模式的頻道特徵向量及用於非引導模式的一空 間濾波器矩陣。空間濾波器矩陣能根據如下述的各種不同 接收器空間處理技術而取得。復原的資料符號流然後根據 其選取資料率而解調變及解碼，以獲得第二鏈路的多重解 碼資料流。端子亦可傳送/接收每個鏈路的導頻與選取的 資料率。 本發明的各種不同觀點、具體實施例、與特徵將在下面
0\88\88946.DOC 1337477 如果發射器有足夠頻道狀態資訊（CSI)，才可經由分解或 一些其他技術而用來使一多輸入多輸出頻道的該等空間 頻道正交。一非引導SM模式（或者簡單言之，只是—非引 導模式）需要非常小的資訊以經由多輸入多輸出頻道來同 時傳送多重資料流’但是效率不會與引導模式一樣好。如 下述，一適當SM模式能根據各種不同因素的使用而選取。 表1摘錄引導與非引導模式的—些主要觀點。每個模 式具有不同的能力與需求。 對於引導模式而s ’發射器可傳送一導頻，以允許接收 器評估多輸入多輸出頻道，且接收器可傳回足夠的頻道狀 悲資訊，以允許發射器取得引導向量。發射器或接收器可 將多輸入多輸出頻道分解成特徵模式，且該等特徵模式可 視為正交空間頻道。接收器亦將資料率傳回給每特徵模式 使用。如下所述’發射器與接收器皆可執行空間處理，為 了要在特徵模式上傳送資料。 對於非引導模式而言，發射器可傳送一導頻，以允許接 收器評估多輸入多輸出頻道。接收器是將資料率傳回給每 個空間頻道使用。發射器可（例如，從它的天線）傳送資料， 而不需任何空間處理，且接收器可執行空間處理，以復原 傳送的資料。在發射器與接收器上有關引導與非引導模式 的導頻傳送與空間處理是在下面描述。 〇 \g8\88946 00C -9- 1337477
MilLj：與非引導模式的需求 導頻 引導模式 1爷後式的1»尽 非引導模式 發射器傳送一導頻 接收器傳回由發射器 使用的頻道狀態資 訊，以取得引導向量 發射器傳送一導頻 比率回备1 接收器傳回每個特徵 模式的資料率 、 接收器（例如，從每個 傳送天線）傳回每個空 間頻道的資料率 空間處理 發射器使用引導向量 矩陣V執行空間處理 接收器使用特徵向量 矩陣ϋ矩陣執行空間 處理 發射器是傳送來自母 個傳送天線的資料 接收器能使用CCMI、 MMSE、SIC 等（下述） 來執行空間處理 在下面描述中’一使用者端子可以是發射器及/或接收 益，且一存取點可同樣是發射器及/或接收器。對等通信 可使用相同的基本原理來支援。 1·引導模式 的多輸入多輸出頻 其能以下式表示： 方程式（1) 透過Λ^傳送天線與~接收天線形成 道的特徵為一xw頻道響應矩陣η， hu hx.2 Λ J2int IL= ^丨厶22 Λ仏，町 Μ Μ ο Μ
Aw /ζ〜,2 Λ心〜 其中i-l.·，％且j = l.··；^的登錄；^是在傳送天線j與接收 天，.泉1足間的耦合（即是，複合增益）。為了簡化，多輸入多 輸出頻道假設是具的全位列（rank)。 早數值分解可在Η執行，以獲得η的％特徵模式，如下 所示： H=UIVh 方程式（2)
O:\88\88946 DOC 1337477 其中狀E的左特徵向量的—（"鴻）的單位（⑽㈣)矩陣 [疋Η的早數值的一（％ χΛ^)對角線矩陣； ^是Η的右特徵向量的一（ΝτΧΝτ)單式矩陣；及 ””表示共軛（conjugate)轉移。 =單式矩陣Μ的特徵性值為mh m，其中又是翠位矩陣。 卓式矩陣的搁是彼此正交。
ϋ的右特徵向量亦稱為引導向量，且可用於發射器的空 ，處理’以在迁祕本徵模式上傳送資料。⑽左特徵向 量可供接收器料空間處理，以復原在Α本徵模式上傳送 的資料。本徵模式可視為經由分解獲得的正交空間頻道。 £的對角線登錄是Η的單數值，其表示A特徵模式的頻道增 益0 在一實際的系統中，只可獲得_一評估，且只能取得 -、-與辽的評估。由於例如一有缺點頻道評估的各種不同 理由所以心至間頻道典型亦不是完全彼此正交。為了簡 化’在此的描述係假設沒有錯誤的頻道評估與分解。此 _ 外’術語”本徵模式"涵蓋使用分解進行空間頻道正交的情 況’即使由於例如一有缺點頻道評估而使嘗試不能完全成 .. 功。 表2係摘錄在發射器與接收器上有關引導模式的空間處 理。在表2，§_是具在η的本徵模式上傳送^資料符號的 向量’ 是具從傳送天線傳送的^傳送符號的一向 量’ 1st是具從接收天線獲得％接收符號的一向量，^是具 W復原資料符號的—向量（即是，^是&的一評估），而且下
O:\85\88946.DOC -11· 1337477 標”st”表示引導模式。如在此的使用，一"資料符號”可視 為資料的調變符號，且一"導頻符號”可視為導頻的一調變 符號。 表2-引導模式的空間處理 發射器 接收器 2Lst"V s L工1〜 本徵值分解亦可在Η的一相關矩陣上執行，該相關矩陣 是R=EHH，如下式所示： R=HhH=VAVh 方程式(3) · 其中A是本徵值的一對角線矩陣，其是在Σ的單數值的平 方。發射器可使用Y執行空間處理，以獲得，且接收器 可使用yHiiH執行空間處理，以獲得I,,。 2.非引導模式 對於非引導模式而言，發射器可傳送來自每個傳送天線 的一資料符號流。此模式的一空間頻道係對應一傳送天 線°接收器可執行空間處理，分開及復原傳送的資料符號 審 流。接收器可使用各種不同接收器處理技術，例如一頻道 關聯矩陣反轉（CCMI)技術（其已知是一強制零技術）、一最 小均方根誤差（MMSE)技術、一連續干擾去除（SIC)技術 等。 ， 表3係摘錄在發射器與接收器上有關非引導模式的空間 處理。在表3，2LnS是具從7Vr傳送天線傳送…資料符號的一 向量，Ins疋具從ΛΓλ接收天線獲得^符號的一向量；Mccmi 疋CCMI技術的—空間濾波器矩陣，M^s(^MMSE技術的
0 \88\88946.DOC -12- 1337477 一空間濾波器矩陣；^_是MMSE技術的一對角線矩陣 (其包含U的對角線元件）；且下標’^’表示非引導模 式0
rr-^式的空間處理 發射器 其中 X =S S ccmi — cmiLnS Mccmi = [HHH]-lHH CCMI —ns · — mmsc — mmse ^^.ΠΓΪ Π1 S C s Mmmse=HHrHHH + g2I]~1ik MMSE msc-diag[ ms eM.] £sic — Ksic Luc 姪i =Ml·,或 SIC (DU 為了簡化，多輸入多輸出頻道雜訊辽是假設具零均方（σ2變 化）的額外白色高斯雜訊（AWGN)、及也η=Ε[迎H]=〇2L的一 自動協變性矩陣。 對於S 1C技術而έ，接收器可在心個連續級中處理&個 接收符號流，以在每個階段中復原一資料符號流。對於每 級λ，其中λ=1…Ns而言，接收器最初是在％個輸入符號流 上透過使用CCMI、MMSE、或一些其他技術而執行有關級 λ的空間處理’並獲得一恢復的資料符號流。Λ^個接收符 號流是第1級的個輸入符號流。接收器可進一步處理（例 如’解調變、交錯、及解碼）級λ的復原資料符號流，以獲 得一解碼的資料流，評估此資料流造成未復原的其他資料 符號流干擾，並從％個輸入符號流取消有關級人的評估干 擾’以獲得有關級λ+1的w個輸入符號流。接收器然後會 在個輸入符號流上重複有關級λ+ 1的相同處理，以復原 O:\88\88946 OOC -13- 1337477 另一資料符號流。 對於每級λ而T ’ SIC接收器能根據—減少的頻道響應矩 陣H、及使用CCMI、MMSE、或一些其他技術而取得該 級的一空間濾波器矩陣忠e。減少矩陣迁λ係透過在對應已 移除λ-1資料符號流的最初矩陣η中移除1個欄而獲得。 矩陣Mi具有（^-人+1)><〜的大小。既然纪於每級是不同， 所以每級的亦不同。 接收器亦使用其他接收器空間處理技術來復原傳送的 資料符號流。 圖2顯示在發射器與接收器上有關引導與非引導模式的 空間處理。在發射器，資料向量i係透過一單元220而乘以 引導模式的矩陣X或非引導模式的單位矩陣I，以獲得傳送 符號向量y在接收器，接收的符號向量t係透過一單元260 而乘以引導模式的矩陣IIH或非引導模式的空間濾波器矩 陣逆，以獲得一偵測的符號向量i，此是£的一非正常評 估。矩陣Μ能根據CCMI、MMSE、或一些其他技術而取得。 向量I是引導模式的對角線矩陣S；1或非引導模式的一對角 線矩陣立·1的進一步依比例決定，以獲得復原的資料符號 向量厂其中2/1 =L是用於CCMI技術’且D1= 是用於 MMSE技術。 3.引導與非引導節點之負荷 如下述與在表1的顯示，引導與非引導模式具有不同導 頻與負荷需求。 A.導頻傳輸 Q\88\88946.DOC -14· 1337477 對於引導與非引導模式而言，發射器可傳送多輸入多輸 出導頻（其是一非引導導頻），以允許接收器評估多輸入多 輸出頻道，並獲得矩陣Η ^多輸入多輸出導頻包含從Λ^個 傳送天線傳送的心個正交導頻傳輸，其中正交能以時間、 頻率、碼、或前述组合而達成。對於碼正交而言，％個導 頻傳輸可從Wr個傳送天線同時傳送，且來自每個天線的導 頻傳輸’覆盖”著一不同正交（例如’ Walsh)序列。接收器能 使用發射器所使用相同個正交序列而"解儲覆蓋，，每個 接收天線i的接收導頻符號，以獲得在接收天線丨與^個傳 送天線每一者之間的複合頻道增益評估。在發射器的覆蓋 與在接收器的解除覆蛊是以類似一分碼多工存取（Cdma) 系統的類似方式執行。對於頻率正交而言，固傳送天線 的~個導頻傳輸可在整個系統帶寬的不同部分頻帶上同 時傳送。對於時間正交而言，~個傳送天線的…個導頻傳 輸能以不同時隙傳送。在如何情況，在個導頻傳輸之中 的正父允许接收器從每個傳送天線區別導頻傳輸。 對於引導模式而言，接收器可傳回充份的頻道狀態資 訊，以允許發射器取得引導向量。接收器能以直接形式（例 如，透過傳送乂的登錄）或以間接形式（例如，透過傳送— 引導或非引導導頻）將此資訊傳送。 B ·免料率撰擇/控制.
接收器可評估每個空間頻道的接收信號_雜訊-干擾比 (SNR)，其係對應引導模式的—特徵模式或非引導模式的 一傳送天線。接收的SNR是因發射器與接收器使用的SM
0 \88\8S946 OOC -15· 1337477 么p(k) ’且透過一單元320使用修正矩陣£ap(k)而進一步依 比例調整，以獲得下行鏈路的傳輸符號向量2Ldn(k)。在使 用者端子120，接收的符號向量tdn(k)係透過一單元360而 乘以矩陣匕（k)’並透過一單元362而使用矩陣^^(k)而進一 步依比例決定’以獲得下行鏈路的復原資料符號向量 L(k)。 對於上行鏈路而言，在使用者端子120，資料符號向量 §_uP(k)係透過一單元39〇而乘以矩陣uk)，及透過一單元 392而使用修正矩陣進一步依比例決定，以獲得上行 鍵路的傳送符號向量^在存取點丨丨〇，接收的符號向 量[uP(k)係透過一單元34〇而乘以矩陣<(k)，及透過一單元 342而使用矩陣g/ι (k)進一步依比例決定，以獲得上行鏈路 的復原資料符號向量Λ (k)。 -up 圖4顯示在多輸入多輸出無線區域網路系統中，在存取 點11 0與使用者端子i 2〇上有關非引導模式的下行鏈路與 上行鏈路資料傳輸的空間處理。對於下行鏈路而言，在存 取點110 ’資料符號向量idn(k)係透過一單元420而乘以單 位矩陣i ’以獲得下行鏈路的傳送符號向量^在使用 者端子120，接收的符號向量tdn(k)係透過一單元46〇而乘 以一空間濾波器矩陣^ut(k)，及透過一單元462使用對角線 矩陣空:,1 (k)進一步依比例決定，以獲得下行鏈路的復原資 料符號向量L(k)。矩陣Mut(k)與么,l((k)能根據有效的下行 鏈路頻道響應矩陣廷edn(k)及使用CCMI、MMSE、SIC、或 一些其他技術而取得。 0 \88\88946 DOC •23- 1337477 對於上行鏈路而言，在使用者端子，資料符號向量 LP(k)係透過一單元490而乘以單位矩陣p以獲得上行鏈路 的傳送符號向量&up(k)。在存取點11 〇，接收的符號向量 [up(k)係透過一單元44〇而乘以一空間濾波器矩陣Map(k)， 並透過一單元442使用一對角線矩陣w((k)進一步依比例 決疋’以獲得上行鏈路的復原資料符號向量。矩陣 M_aP(k)與Dap (k)係根據有效的上行鏈路頻道響應矩陣 过eup(k)及使用CCMI、MMSE ' SIC、或一些其他技術而取 得。 _ 圖5係顯示存取點no與使用者端子丨2〇的方塊圖^在下 行鏈路，在存取點11〇，一傳送（τχ)資料處理器514是從一 資料源512接收路由資料及從一控制器53〇接收控制資 - 料傳送資料處理器5 14係根據對應用於資料流所選取資 ， 料率的編碼與調變方法而處理（例如，編碼、交錯、與符 號映射）該等仏個資料流的每一者，以獲得一資料符號 流。一傳送空間處理器520是從傳送資料處理器514接收馬 個資料符號流；在資料符號上執行空間處理（依需要）；導 頻付號多通；及提供沁〃天線的^^^傳輸符號流。透過傳送 ， 空間處理器520的處理是因引導或非引導模式處理選擇使 . 用而定，且以上述執行，每個發射器單元（TMtr)522可接 _， 收及>處理（例如，0FDM調變與調件）一相對的傳送符號 流，以產生一下行鏈路信號。發射器單元522&至52仏口 可分別提供用以從~天線5243至524ap傳送的~個下行 鏈路信號》
ρ \88\88946.DOC -24- 1337477 對於資料接收（方塊630)而言，從一第二通信鏈路（例 如，下行鏈路）的多重天線獲得的多重接收符號流係根據 選取的SM模式而空間處理，以獲得多重復原的資料符號 流（步驟632)。接收空間處理是使用引導模式的特徵向量矩 . 陣與非引導模式的空間濾波器矩陣。空間濾波器矩陣能根 據CCMI、MMSE、SIC、或一些其他技術而取得。復原的 ' 資料付號流然後根據其選取資料率而解調變及解碼，以獲 得第二鏈路的多重解碼資料流（步驟634)。 在方塊620的資料傳輸與在方塊63〇的資料接收可同時 _ 或不同時間發生β導頻與資料率亦可傳送及接收為了要 支援具選取SM模式的資料傳送與接收。 在此描述的多模式端子與存取點與資料傳輸/接收技術 .. π以各種不同裝置實施。例如，《些實體與技術能以硬 ：
在—或多個應用特殊積體電路
在此描述的技術能以模组（例 以執行在此描述的功能。軟體 疋（例如’在圖5的記憶體單元532 例如，控制器530與580)執行。記
0 \8S\88946 DOC -27, 1337477 理器外部實施，在此情況，它 不同裝置而通信耦合到處理 ’fe體單元可在處理器中或處 可經由在技術中已知的各種 器。 在此包括的標題是料參考㈣助找到以單元。这法 標題並未缝於在此下面描述的觀念範圍，且這些觀念在 整個說明書的其他單元具有適用性。 ，揭不具體實施例的先前描述提供允許熟諳此技者可製 l或使用本發。攻些具體實施例的各種不同修改對於孰諸 此技者是顯然的’且在此定義的—般原理可運用到其他具 體貫施例，請離本發明的料或範圍。因此，本發 明並未侷限於在此顯示的具體實施例，而是符合在此揭示 的原理與新穎特徵的廣泛範圍。 【圖式簡單說明】 圖1顯示一多輸入多輸出系統； 圖2顯示在發射器與接收器上有關引導與非引導模式之 空間處理； 圖3與4係顯示分別在一存取點與一使用者端子上有關 引導與非引導模式的空間處理； 圖5顯示存取點與使用者端子的方塊圖；及 圖6顯示用於多輸入多輸出系統的資料傳送及接收處 理。 【圖式代表符號說明】 100 120 多輸入多輸出系統 使用者端子
0 \88\88946 DOC -28- 1337477 130 系統控制器 110 存取點 512 資料源 514 傳送資料處理器 520 傳送空間處理器 532, 582 記憶體早元 534, 584 SM模式選擇器 530 控制器 542 接收資料處理器 540 接收空間處理器 524, 522 天線 522a, 522ap 發射器單元 554a, 554ut 天線 560 接收空間處理器 570 接收資料處理器 572 資料沉接 578 頻道評估器 580 控制器 590 傳送空間處理器 588 傳送資料處理器 Ο \88\88946 DOC -29-

Claims (1)

1337477 科7月0日修正替換頁
第092129577號專利申請案 中文申請專利範圍替換本(99年7月） 拾、申請專利範園： 1. 一種在無線多輸入多輸出（ΜΙΜΟ)通信系統中之端子，其 包含： 模式選擇器其可操作以從該端子支援的複數個空間 多工模式之中選取一空間多工模式，其中該複數個空間多 工模式包括一引導模式與一非引導模式且其中該複數個 空間多工模式的每一者能經由一多輸入多輸出頻道的多 重空間頻道而支援多重資料符號流的同時傳送，其中該多 輸入多輸出頻道係使用在該端子上的複數個天線形成； 一傳送空間處理器，其可操作以根據該選取的空間多工 模式而將一第一複數個資料符號流予以空間處理，以從該 複數個天線傳送及經由一第一通信鏈路而獲得複數個傳 送符號流；及 一接收空間處理器，其可操作以根據該選取的空間多工 模式而將從複數個天線獲得的複數個接收符號流予以空 間處理，以獲得複數個復原的資料符號流，其中該等復原 的資料符號流係經由一第二通信鏈路傳送的一第二複數 個資料符號流評估。 2. 如申請專利範圍^項之端子，其中該引導模式可支援經 由多輸入多輸出頻道的多重正交空間頻道而支援多重資 料符號流的同時傳輸，而且其中該非引導模式可支援來自 該複數個天線的多重資料符號流的同時傳輸。 3. 如申請專利範圍第1項之端子，其中 該傳送空間處理器可操作以將第-複數個資料符號流 88946-990723.doc Ώ37477 . 7年?月1>日修正替換頁 - 肖用於該引導模式的-引導向量矩陣及與用 模式的一單位矩陣相乘；及 • 該接收空間處理器可操作以將該複數個接收符號流與 用於該引導模式的-特徵向量矩陣及與用於該μ導模 式的一空間濾波器矩陣相乘。 4. 如申請專利範圍第3項之端子，其進一步包含： 一通道評估器’其可操作以評估該第二通信鏈路的 道響應，·及 ^ -控制器，其可操作以根據該第二通信鏈路的該評估頻 道響應而取得該空間濾波器矩陣。 5. 如申請專利範圍第4項之端子，其中該控制器可操作以根 . 據一頻道關聯矩陣倒轉（CCMI)技術或一最小均方根誤差 ' (MMSE)技術而取得該空間濾波器矩陣。 6. 如申請專利範圍第5項之端子，其中該控制器可操作以根 據一連續干擾去除（SIC)技術與使用一頻道關聯矩陣倒轉 φ (CCMI)技術 '或一最小均方根誤差（MMSE)技術而取得該 空間遽波器矩陣。 .7·如申請專利範圍第1項之端子，其進一步包含： —傳送資料處理器，其可操作以根據一第一複數個資料 率而將一第一複數個資料流編碼及調變，以獲得該第一通 信鏈路的第一複數個資料符號流；及 一接收貧料處理器，其可操作以根據一第二複數個資料 率而將複數個復原的資料符號流解調變與解碼，以獲得該 第二通信鏈路的複數個且解碼資料流。 88946-990723.doc 1337477 8·如申請專利範圍第7項之端子，其中該等 ^用於該引導模式的多輸人多輸出頻道的複數個= 莫式與用於该非引導模式的該複數個天線。 ’ 9-如申請專利範圍第丨項之端子，其 ^ g* « μ - 、如果5亥知子關於下行 鏈路及上仃鏈路響應而經校 導楛彳日1田 式選擇益便選取該引 導模式，且如果該端子未被校 非引導模式，而且其中如果該端子選擇裔便選取該 路的頻道響應會是該第一通Γ ν 。亥第一通信鏈 〇.如申請專利範圍第1項之端子，其中該模式選擇器4作 =根據傳送資料量、頻道狀況與該端子通信的_^ 力、或組合而選取該引導模式或該非引導模式。月匕 u.如申請專利範圍第丨項之端子，苴 於一第一 AR八-R Μ模式選擇器可操作 “第貝料交談選取該非料模式，而在其餘部八 的6亥貝料父談選取該引導模式。 、刀 A如申請專利範圍第丨項之端子，其#該模式選擇 以根據接收的信號·雜訊·干擾 〇知作 5|導模式。 干擾比而選取該引導模式或該非 Π.如申請專利範圍第 逸―半η 項之鸲子，其中該傳送空間處理器可 ν知作以將用於該引導模式的一引 非引導導·植沾非？丨，* 導頻-、用於該 料¥頻的-非引導模式予以多工化， 是在該多輸入多輸出镅、f Μ 、 '^引V導頻 非引道/ 特徵模式上傳送，而且其h 引導¥頻包含來自該複數個 輸。 π α歿数個正父導頻傳 14‘如申請專利範圍第1項之端 4子，其令該傳送空間處理器可 88946-990723.doc 1337477 、-步操作以將弓丨導與非引導模式的一非引 化而且其中該非引導導頻包含來自複數個天線的複 數個正交導頻傳輸。 15.=申請專利範圍第1之端子，其中該端子可操作以與該 夕輸入多輸出系统的一存取點相溝通。 6.如申吻專利圍第i項之端子，其中該端子可操作以與該 夕輸入多輸出系統的另一端子點對點(pa"”…)溝通。 】7.如申請專利範圍第旧之端子，其中該多輸人多輸出系統 係利用正交分頻多工⑽_，而且其中該等傳送與接收 空間處理器可執行複數個子頻帶每一者的空間處理。 ^申請專利範圍第1項之端子，其中該多輸入多輸出系統 疋一分時雙工（TDD)系統。 19·一種在無線多輸入多輸出(ΜΙΜΟ)通信系統中處理資料之 方法，其包含： 、 2數個空間多項式之中選取—空間多卫模式其中 1 复數個空間多工模式包括—引導模式與-非引導模式 t其中該複數财間多卫模式的每—者可經由—多輸入 昧心 多重工間頻道而支援多重資料符號流的同 時傳輸； 根據該選取的空間多握 祙.…* ]夕工枳式而將-第-複數個資料符 號》’_L予以空間處理，以你族去 . 乂攸複數個天線的傳送及經由一第〆 通化鏈路而獲得複數個符號流；及 根據該選取的空間多描 产 模式而將從複數個天線獲得的 複數個接收符號流予以空門卢 工間處理，以獲得複數個復原的資 88946-990723.doc 1337477 7年7月替換頁 料符號流，其中該等復原的資料符號流係經由一第二通信、 鏈路傳送的一第二複數個資料符號流的評估。 20.如申請專利範圍第19項之方法，其中該第一複數個資料符 號流是與用於該引導模式的引導向量矩陣及與用於該非 引導模式的一單位矩陣相乘，而且其中複數個接收符號流 是與用於該引導模式的特徵向量矩陣與用於該非引導模 式的一空間濾波器矩陣相乘。 21·如申請專利範圍第2〇項之方法，其進一步包含： 評估該第二通信鏈路的一頻道響應；及 根據該第二通信鏈路的評估頻道響應而取得該空間淚 波器矩陣。 u 22. 如申請專利範圍第21項之方法，其中該空間濾波器矩陣係 根據一頻道關聯矩陣倒轉（CCMI)技術、一最小均方根誤差 (MMSE)技術、或一連續、干擾去除（SIC)技術而取得。 23. —種在無線多輸入多輸出（MIM〇)通信系統中之裝置，其 包含： 〃 用以從複數個空間多工模式之中選取—介 二間多工模式 之構件，其令該複數個空間多工模式包括—弓丨導模式與— 非引導模式且其中該複數個空間多工模式的每一者可鲈 由一多輸入多輪出頻道的多重空間頻道而支援多重資： 符號流的同時傳輸； 胃" 能根據該選取的空間多工模式而將一第一複數個資料 符號流予以空間處理’以獲得複數個傳送符號流之構件， 用以從複數個天線及經由一第一通信鏈路而傳送複數 88946-990723.doc 1337477 個符號流之構件； β年7糾日修正替換頁 用以於-第二通信鏈路從複數個天線接收複數個接收 符號流之構件；及 能根據該選取的空間多工模式而將該複數個接收符號 流予以空間處理，以獲得複數個復原的資料符號流之構 件，其t該等復原的資料符號流係經由該第二通信鏈路傳 送的一第二複數個資料符號流的評估。 24‘如申請專利範圍第23項之裝置，其中該第-複數個資料符 號流是與用於該引導模式的引導向量矩陣及與用於該非 引導模式的—單位矩陣相乘，而且其中複數個接收符號流 疋與用於該引導模式的一特徵向量矩陣、與用於該非引導 模式的一空間濾波器矩陣相乘。 25. 如申清專利範圍第24項之裝置，其進一步包含： 用以評估該第二通信鏈路的一頻道響應之構件；及 其能根據該第二通信鏈路的該評估頻道響應而取得該 空間濾波器矩陣之構件。 26. 如申請專利範圍第25項之裝置，其中該空間濾波器矩陣係 根據一頻道關聯矩陣倒轉（CCMI)技術、一最小均方根誤差 (MMSE)技術、或一連續干擾去除（SIC)技術而取得。 27. —種在無線多輸入多輸出（MIM〇)通信系統中之存取點， 其包含： 一模式選擇器’其可操作以從該存取點支援的複數個空 間多工模式之中選取一空間多工模式，其中該複數個空間 多工模式包括一引導模式與一非引導模式且其中該複數 88946-990723.doc -6 - 1337477 丨· 7月τ}日修正替換頁、 個二間多工模式的每—者可經由一多輸入多輸出頻道的 多重空間頻道而支援多重資料符號流的同時傳輸，其中該 夕輸入多輸出頻道係使用在該存取點的複數個天線形成； —傳送空間處理器，其可操作以根據該選取的空間多工 模式而將一第一複數個資料符號流予以空間處理，以從該 複數個天線傳送及經由—第一通信鏈路而獲得複數個傳 送符號流；及 —接收空間處理器’其可操作以根據該選取的空間多工 模式而將從該複數個天線穫得的複數個接收符號流予以 空間處理’以獲得複數個復原的資料符號流，其中該等復 原的資料符號流係經由一第二通信鏈路傳送的一第二複 數個資料符號流的評估。 28.如申請專利範圍第27項之存取點，其中： 該傳送空間處理器是將該第一複數個資料符號流與該 引導模式的一引導向量矩陣及與用於該非引導模式的單 位矩陣相乘；及 該接收空間處理器是將複數個接收符號流與用於該弓丨 導模式的一特徵向量矩陣及與用於該非引導模式的一空 間濾波器矩陣相乘。 88946-990723.doc 1337477 第092129577號專利申請案 中文圖式替換頁(98年12月） S3
S0 88946-981215.doc 133747^ 〇92129577號專利申請案 中文圖式替換頁(98年12月） ^年/碉价修正替換頁 S4
si啦ϊ 55 矩陣乘算 I ▼ 矩陣乘算 ____1 、衾 i 海^^雜^· (¾
88946-981215.doc
TW092129577A 2002-10-25 2003-10-24 Multi-mode terminal, access point, and method of processing data in a wireless mimo system TWI337477B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42130902P 2002-10-25 2002-10-25
US10/693,535 US7324429B2 (en) 2002-10-25 2003-10-23 Multi-mode terminal in a wireless MIMO system

Publications (2)

Publication Number Publication Date
TW200417187A TW200417187A (en) 2004-09-01
TWI337477B true TWI337477B (en) 2011-02-11

Family

ID=32179859

Family Applications (2)

Application Number Title Priority Date Filing Date
TW092129577A TWI337477B (en) 2002-10-25 2003-10-24 Multi-mode terminal, access point, and method of processing data in a wireless mimo system
TW098144256A TWI436617B (zh) 2002-10-25 2003-10-24 無線多輸入多輸出系統之多模式端子、存取點及處理資料之方法

Family Applications After (1)

Application Number Title Priority Date Filing Date
TW098144256A TWI436617B (zh) 2002-10-25 2003-10-24 無線多輸入多輸出系統之多模式端子、存取點及處理資料之方法

Country Status (13)

Country Link
US (2) US7324429B2 (zh)
EP (2) EP1556980B1 (zh)
JP (2) JP5247976B2 (zh)
KR (1) KR101041334B1 (zh)
CN (1) CN1708936B (zh)
AU (2) AU2003287326C1 (zh)
BR (1) BR0315607A (zh)
CA (1) CA2501285C (zh)
IL (1) IL202480A0 (zh)
MX (1) MXPA05004312A (zh)
RU (2) RU2329604C2 (zh)
TW (2) TWI337477B (zh)
WO (1) WO2004038985A2 (zh)

Families Citing this family (131)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8194770B2 (en) 2002-08-27 2012-06-05 Qualcomm Incorporated Coded MIMO systems with selective channel inversion applied per eigenmode
US7324429B2 (en) 2002-10-25 2008-01-29 Qualcomm, Incorporated Multi-mode terminal in a wireless MIMO system
US8208364B2 (en) * 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US8218609B2 (en) * 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US8320301B2 (en) * 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US20040081131A1 (en) 2002-10-25 2004-04-29 Walton Jay Rod OFDM communication system with multiple OFDM symbol sizes
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
US7002900B2 (en) * 2002-10-25 2006-02-21 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US8134976B2 (en) 2002-10-25 2012-03-13 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US8170513B2 (en) * 2002-10-25 2012-05-01 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US8570988B2 (en) * 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US7885228B2 (en) * 2003-03-20 2011-02-08 Qualcomm Incorporated Transmission mode selection for data transmission in a multi-channel communication system
US7483675B2 (en) * 2004-10-06 2009-01-27 Broadcom Corporation Method and system for weight determination in a spatial multiplexing MIMO system for WCDMA/HSDPA
US7565114B2 (en) * 2003-07-16 2009-07-21 Nec Corporation Transmitter apparatus, receiver apparatus, and radio communication system
US7065144B2 (en) 2003-08-27 2006-06-20 Qualcomm Incorporated Frequency-independent spatial processing for wideband MISO and MIMO systems
US9226308B2 (en) 2003-10-15 2015-12-29 Qualcomm Incorporated Method, apparatus, and system for medium access control
US8842657B2 (en) 2003-10-15 2014-09-23 Qualcomm Incorporated High speed media access control with legacy system interoperability
US8284752B2 (en) 2003-10-15 2012-10-09 Qualcomm Incorporated Method, apparatus, and system for medium access control
US8233462B2 (en) 2003-10-15 2012-07-31 Qualcomm Incorporated High speed media access control and direct link protocol
US8462817B2 (en) 2003-10-15 2013-06-11 Qualcomm Incorporated Method, apparatus, and system for multiplexing protocol data units
US8483105B2 (en) 2003-10-15 2013-07-09 Qualcomm Incorporated High speed media access control
US8472473B2 (en) 2003-10-15 2013-06-25 Qualcomm Incorporated Wireless LAN protocol stack
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
US8204149B2 (en) * 2003-12-17 2012-06-19 Qualcomm Incorporated Spatial spreading in a multi-antenna communication system
US7302009B2 (en) * 2003-12-17 2007-11-27 Qualcomm Incorporated Broadcast transmission with spatial spreading in a multi-antenna communication system
US7206550B2 (en) * 2003-12-29 2007-04-17 Intel Corporation Antenna subsystem calibration apparatus and methods in spatial-division multiple-access systems
US8369790B2 (en) 2003-12-30 2013-02-05 Intel Corporation Communication overhead reduction apparatus, systems, and methods
US7336746B2 (en) * 2004-12-09 2008-02-26 Qualcomm Incorporated Data transmission with spatial spreading in a MIMO communication system
US7818018B2 (en) 2004-01-29 2010-10-19 Qualcomm Incorporated Distributed hierarchical scheduling in an AD hoc network
US8903440B2 (en) * 2004-01-29 2014-12-02 Qualcomm Incorporated Distributed hierarchical scheduling in an ad hoc network
US8169889B2 (en) 2004-02-18 2012-05-01 Qualcomm Incorporated Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system
US7519035B2 (en) * 2004-02-23 2009-04-14 Sharp Laboratories Of America, Inc. Method to negotiate consumed power versus medium occupancy time in MIMO based WLAN systems using admission control
US7742533B2 (en) 2004-03-12 2010-06-22 Kabushiki Kaisha Toshiba OFDM signal transmission method and apparatus
US8315271B2 (en) 2004-03-26 2012-11-20 Qualcomm Incorporated Method and apparatus for an ad-hoc wireless communications system
US20050238111A1 (en) * 2004-04-09 2005-10-27 Wallace Mark S Spatial processing with steering matrices for pseudo-random transmit steering in a multi-antenna communication system
US7564814B2 (en) * 2004-05-07 2009-07-21 Qualcomm, Incorporated Transmission mode and rate selection for a wireless communication system
US8923785B2 (en) * 2004-05-07 2014-12-30 Qualcomm Incorporated Continuous beamforming for a MIMO-OFDM system
US8285226B2 (en) * 2004-05-07 2012-10-09 Qualcomm Incorporated Steering diversity for an OFDM-based multi-antenna communication system
EP1766806B1 (en) * 2004-06-22 2017-11-01 Apple Inc. Closed loop mimo systems and methods
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
US7978649B2 (en) * 2004-07-15 2011-07-12 Qualcomm, Incorporated Unified MIMO transmission and reception
EP1622288B1 (en) * 2004-07-27 2012-10-24 Broadcom Corporation Pilot symbol transmission for multiple-transmit communication systems
JP4744965B2 (ja) * 2004-08-09 2011-08-10 パナソニック株式会社 無線通信装置
US7978778B2 (en) * 2004-09-03 2011-07-12 Qualcomm, Incorporated Receiver structures for spatial spreading with space-time or space-frequency transmit diversity
US7894548B2 (en) * 2004-09-03 2011-02-22 Qualcomm Incorporated Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system
JP2008512963A (ja) * 2004-09-09 2008-04-24 アギア システムズ インコーポレーテッド マルチ・アンテナ通信システムにおいて直交パイロット・トーンを伝達するための方法および装置
KR100905605B1 (ko) * 2004-09-24 2009-07-02 삼성전자주식회사 직교주파수분할다중화 다중입출력 통신 시스템의 전송 방법
CN102868511B (zh) 2004-10-29 2016-08-03 夏普株式会社 通信方法和无线发射机
US8498215B2 (en) * 2004-11-16 2013-07-30 Qualcomm Incorporated Open-loop rate control for a TDD communication system
EP1843497B1 (en) 2005-01-18 2018-06-20 Sharp Kabushiki Kaisha Wireless communication apparatus and wireless communication method
US7554952B2 (en) * 2005-02-09 2009-06-30 Alcatel-Lucent Usa Inc. Distributed multiple antenna scheduling for wireless packet data communication system using OFDM
JP2006287756A (ja) * 2005-04-01 2006-10-19 Ntt Docomo Inc 送信装置、送信方法、受信装置及び受信方法
US7466749B2 (en) 2005-05-12 2008-12-16 Qualcomm Incorporated Rate selection with margin sharing
US7872981B2 (en) * 2005-05-12 2011-01-18 Qualcomm Incorporated Rate selection for eigensteering in a MIMO communication system
US7680211B1 (en) * 2005-05-18 2010-03-16 Urbain A. von der Embse MIMO maximum-likelihood space-time architecture
US9130706B2 (en) * 2005-05-26 2015-09-08 Unwired Planet, Llc Method and apparatus for signal quality loss compensation in multiplexing transmission systems
KR100880991B1 (ko) * 2005-06-16 2009-02-03 삼성전자주식회사 이동통신 시스템에서 다중 안테나를 이용한 파일럿 송수신장치 및 방법
US8358714B2 (en) * 2005-06-16 2013-01-22 Qualcomm Incorporated Coding and modulation for multiple data streams in a communication system
CN100574170C (zh) * 2005-06-30 2009-12-23 华为技术有限公司 实现多模网络共存的系统及方法
JP4671790B2 (ja) * 2005-07-07 2011-04-20 パナソニック株式会社 通信装置、基地局装置及び通信方法
US7242961B2 (en) * 2005-07-13 2007-07-10 Broadcom Corporation Channel reciprocity matrix determination in a wireless MIMO communication system
WO2007015143A2 (en) * 2005-08-01 2007-02-08 Nokia Corporation Method, apparatus and computer program product providing widely linear interference cancellation for multi-carrier systems
KR100891448B1 (ko) 2005-08-04 2009-04-01 삼성전자주식회사 다중 안테나 시스템에서 공간 멀티플랙싱 방식의 검출 장치및 방법
US8331216B2 (en) 2005-08-09 2012-12-11 Qualcomm Incorporated Channel and interference estimation in single-carrier and multi-carrier frequency division multiple access systems
US8855704B2 (en) * 2005-08-26 2014-10-07 Qualcomm Incorporated Fast cell selection in TD-CDMA (UMTS TDD)
US8600336B2 (en) 2005-09-12 2013-12-03 Qualcomm Incorporated Scheduling with reverse direction grant in wireless communication systems
MY146867A (en) * 2005-09-29 2012-09-28 Interdigital Tech Corp Mimo beamforming-based single carrier frequency division multiple access system
US7948959B2 (en) 2005-10-27 2011-05-24 Qualcomm Incorporated Linear precoding for time division duplex system
US7657244B2 (en) * 2005-10-27 2010-02-02 Samsung Electronics Co., Ltd. Methods of antenna selection for downlink MIMO-OFDM transmission over spatial correlated channels
US8130727B2 (en) * 2005-10-27 2012-03-06 Qualcomm Incorporated Quasi-orthogonal allocation of codes in TD-CDMA systems
US8068464B2 (en) 2005-10-27 2011-11-29 Qualcomm Incorporated Varying scrambling/OVSF codes within a TD-CDMA slot to overcome jamming effect by a dominant interferer
KR100737909B1 (ko) * 2005-11-24 2007-07-10 한국전자통신연구원 무선 통신 시스템의 데이터 전송 방법
US8107549B2 (en) 2005-11-30 2012-01-31 Qualcomm, Incorporated Multi-stage receiver for wireless communication
US8200164B2 (en) * 2005-12-01 2012-06-12 Intel Corporation Wireless communication system, associated methods and data structures
US7570210B1 (en) 2005-12-12 2009-08-04 Marvell International Ltd. Steering matrix feedback for beamforming
ATE523978T1 (de) * 2005-12-27 2011-09-15 Mitsubishi Electric Corp Verfahren und vorrichtung zur mitteilung an ein zweites telekommunikationsgerät von informationen in bezug auf in einem ersten telekommunikationsgerät in bestimmten frequenzteilbändern empfangene störungskomponenten
EP1804394A1 (en) 2005-12-27 2007-07-04 Mitsubishi Electric Information Technology Centre Europe B.V. Method and device for reporting information related to interference components received by a first telecommunication device to a second telecommunication device
CN1992554A (zh) 2005-12-29 2007-07-04 上海贝尔阿尔卡特股份有限公司 无线通信系统中干扰消除的方法和设备
KR101222838B1 (ko) * 2006-02-14 2013-01-15 삼성전자주식회사 다중 통신 모드를 지원하는 단말의 통신 방법
JP4776565B2 (ja) * 2006-02-28 2011-09-21 パナソニック株式会社 無線通信システム、無線通信装置、およびチャネル相関行列決定方法
KR100819285B1 (ko) * 2006-03-16 2008-04-02 삼성전자주식회사 다중 사용자를 지원하는 다중 안테나 시스템에서의 피드 백 정보 송/수신방법 및 그 시스템
EP1848132A1 (en) * 2006-04-18 2007-10-24 Mitsubishi Electric Information Technology Centre Europe B.V. Method for transferring information related to interference components and power information used by a telecommunication device for weighting at least one pilot signal
US8543070B2 (en) 2006-04-24 2013-09-24 Qualcomm Incorporated Reduced complexity beam-steered MIMO OFDM system
US8290089B2 (en) * 2006-05-22 2012-10-16 Qualcomm Incorporated Derivation and feedback of transmit steering matrix
JP5076199B2 (ja) * 2006-06-14 2012-11-21 国立大学法人九州大学 伝送システム、伝送方法、送信装置、受信装置、及び復号方法
EP2056505B1 (en) * 2006-07-07 2014-08-27 Mitsubishi Electric Corporation Wireless communication system
US20100099416A1 (en) * 2006-10-05 2010-04-22 Telefonaktiebolaget L M Ericsson (Publ) MIMO Mode Selection at Handover
US8781522B2 (en) * 2006-11-02 2014-07-15 Qualcomm Incorporated Adaptable antenna system
US8314736B2 (en) 2008-03-31 2012-11-20 Golba Llc Determining the position of a mobile device using the characteristics of received signals and a reference database
US8670704B2 (en) 2007-03-16 2014-03-11 Qualcomm Incorporated Pilot transmission by relay stations in a multihop relay communication system
US8102944B2 (en) * 2007-05-18 2012-01-24 Qualcomm Incorporated Mode and rate control for MIMO transmission
WO2009009548A2 (en) * 2007-07-09 2009-01-15 Qualcomm Incorporated Methods for sending small packets in a peer-to-peer (p2p) network
US8203960B2 (en) * 2007-07-09 2012-06-19 Qualcomm Incorporated Methods for sending small packets in a peer-to-peer (P2P) network
JP5350380B2 (ja) * 2007-07-18 2013-11-27 マーベル ワールド トレード リミテッド 複数のクライアント局に対する独立したデータを同時ダウンリンク伝送するアクセスポイント
EP2183862B1 (en) 2007-07-18 2018-04-18 Marvell World Trade Ltd. Wireless network with simultaneous uplink transmission of independent data from multiple client stations
KR101046691B1 (ko) * 2007-10-19 2011-07-05 삼성전자주식회사 다중 입력 다중 출력 시스템의 수신 장치 및 방법
US7800541B2 (en) 2008-03-31 2010-09-21 Golba Llc Methods and systems for determining the location of an electronic device
US9829560B2 (en) 2008-03-31 2017-11-28 Golba Llc Determining the position of a mobile device using the characteristics of received signals and a reference database
CN101282175B (zh) * 2008-05-16 2012-07-04 西安理工大学 基于垂直分层空时编码的自由空间mimo光通信系统
KR100936245B1 (ko) * 2008-05-23 2010-01-11 전자부품연구원 시변 채널 시공간 블록 부호 데이터 검출 장치 및 방법
JPWO2009157184A1 (ja) * 2008-06-24 2011-12-08 パナソニック株式会社 Ｍｉｍｏ送信装置、ｍｉｍｏ受信装置、ｍｉｍｏ伝送信号形成方法、及びｍｉｍｏ伝送信号分離方法
US8982889B2 (en) 2008-07-18 2015-03-17 Marvell World Trade Ltd. Preamble designs for sub-1GHz frequency bands
JP5219708B2 (ja) * 2008-09-22 2013-06-26 株式会社エヌ・ティ・ティ・ドコモ 移動端末装置、無線基地局装置、無線通信システム及び無線通信方法
EP2194740A1 (en) * 2008-12-03 2010-06-09 Nokia Siemens Network Oy Method and device for data processing in a mobile communication network
US20100231461A1 (en) * 2009-03-13 2010-09-16 Qualcomm Incorporated Frequency selective multi-band antenna for wireless communication devices
JP5391816B2 (ja) 2009-05-08 2014-01-15 ソニー株式会社 通信装置及び通信方法、コンピューター・プログラム、並びに通信システム
US8515363B2 (en) * 2009-06-19 2013-08-20 Sharp Kabushiki Kaisha Systems and methods for providing a reduced power amplifier transmission mode
US8639270B2 (en) 2010-08-06 2014-01-28 Golba Llc Method and system for device positioning utilizing distributed transceivers with array processing
US9088466B2 (en) 2009-07-23 2015-07-21 Marvell World Trade Ltd. Coexistence of a normal-rate physical layer and a low-rate physical layer in a wireless network
US8837524B2 (en) 2011-08-29 2014-09-16 Marvell World Trade Ltd. Coexistence of a normal-rate physical layer and a low-rate physical layer in a wireless network
CN101990230A (zh) * 2009-07-30 2011-03-23 大唐移动通信设备有限公司 一种无线网络通信系统的测量方法和设备
EP3716516B1 (en) * 2010-02-10 2022-01-19 Sun Patent Trust Terminal and communication method thereof
CA2801007C (en) 2010-06-08 2016-01-05 Samsung Electronics Co., Ltd. Multiplexing control and data information from a user equipment in mimo transmission mode
JP5578617B2 (ja) 2010-10-18 2014-08-27 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ 送信方法、送信装置、受信方法および受信装置
EA038454B1 (ru) * 2010-12-09 2021-08-31 Сан Пэтент Траст Способ передачи, устройство передачи, способ приема и устройство приема
KR102092579B1 (ko) 2011-08-22 2020-03-24 삼성전자 주식회사 이동통신 시스템에서 복수 개의 주파수 밴드 지원 방법 및 장치
US20130095747A1 (en) 2011-10-17 2013-04-18 Mehran Moshfeghi Method and system for a repeater network that utilizes distributed transceivers with array processing
WO2013105790A1 (ko) 2012-01-09 2013-07-18 삼성전자 주식회사 로깅 방법 및 장치
CN104221422A (zh) 2012-01-27 2014-12-17 三星电子株式会社 移动通信系统中用于有效地控制接入以用于系统负载调节的方法和装置
KR102058954B1 (ko) 2012-02-06 2019-12-26 삼성전자 주식회사 무선 통신 시스템에서 small data를 효율적으로 전송하는 방법 및 장치
US9414409B2 (en) 2012-02-06 2016-08-09 Samsung Electronics Co., Ltd. Method and apparatus for transmitting/receiving data on multiple carriers in mobile communication system
US9253587B2 (en) 2012-08-08 2016-02-02 Golba Llc Method and system for intelligently controlling propagation environments in distributed transceiver communications
US8965217B2 (en) * 2012-12-10 2015-02-24 Corning Incorporated Superimposing optical transmission modes
US9544116B2 (en) 2014-02-14 2017-01-10 Qualcomm Incorporated Pilot transmission by relay stations in a multihop relay communication system
CN105634664A (zh) * 2014-11-07 2016-06-01 中兴通讯股份有限公司 一种下行非正交多址接入时的解码方法及装置
CN107204838A (zh) * 2016-03-18 2017-09-26 北京邮电大学 基于时空导频调度的信道估计方法及装置
WO2018126446A1 (en) * 2017-01-06 2018-07-12 Qualcomm Incorporated Transparent demodulation reference signal design
US10484078B2 (en) 2017-07-11 2019-11-19 Movandi Corporation Reconfigurable and modular active repeater device
CN109104228A (zh) * 2018-07-13 2018-12-28 安徽蓝煜电子科技有限公司 一种波束赋形的算法
US11516655B2 (en) * 2019-11-08 2022-11-29 Massachusetts Institute Of Technology Physical layer key generation

Family Cites Families (418)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1261080A (en) 1985-12-30 1989-09-26 Shunichiro Tejima Satellite communications system with random multiple access and time slot reservation
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
IL100213A (en) * 1990-12-07 1995-03-30 Qualcomm Inc Mikrata Kedma phone system and its antenna distribution system
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
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
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
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
US5493712A (en) 1994-03-23 1996-02-20 At&T Corp. Fast AGC for TDMA radio systems
CN1149375A (zh) 1994-05-02 1997-05-07 摩托罗拉公司 多路子信道通用协议的方法和装置
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
US5710768A (en) 1994-09-30 1998-01-20 Qualcomm Incorporated Method of searching for a bursty signal
MY120873A (en) 1994-09-30 2005-12-30 Qualcomm Inc Multipath search processor for a spread spectrum multiple access communication system
JPH08274756A (ja) 1995-03-30 1996-10-18 Toshiba Corp 無線通信システム
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
DE69535033T2 (de) 1995-07-11 2007-03-08 Alcatel Zuweisung von Kapazität bei OFDM
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
EP0807989B1 (en) 1996-05-17 2001-06-27 Motorola Ltd Devices for transmitter path weights and methods therefor
JPH09307526A (ja) 1996-05-17 1997-11-28 Mitsubishi Electric Corp デジタル放送受信機
FI101920B (fi) 1996-06-07 1998-09-15 Nokia Telecommunications Oy Kanavanvarausmenetelmä pakettiverkkoa varten
US5822374A (en) 1996-06-07 1998-10-13 Motorola, Inc. Method for fine gains adjustment in an ADSL communications system
US6798735B1 (en) 1996-06-12 2004-09-28 Aware, Inc. Adaptive allocation for variable bandwidth multicarrier communication
US6072779A (en) 1997-06-12 2000-06-06 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
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
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
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
WO1998024192A1 (en) 1996-11-26 1998-06-04 Trw Inc. Cochannel signal processing system
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
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
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
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
EP0899896A1 (de) 1997-08-27 1999-03-03 Siemens Aktiengesellschaft Verfahren und Einrichtung zur Schätzung räumlicher Parameter von Überstragungskanälen
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
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
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
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
US6088387A (en) 1997-12-31 2000-07-11 At&T Corp. Multi-channel parallel/serial concatenated convolutional codes and trellis coded modulation encoder/decoder
EP2254300B1 (en) 1998-01-06 2013-05-15 Mosaid Technologies Incorporated Multicarrier modulation system with variable symbol rates
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
US5982327A (en) 1998-01-12 1999-11-09 Motorola, Inc. Adaptive array method, device, base station and subscriber unit
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
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
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
CN1192651C (zh) 1998-07-16 2005-03-09 三星电子株式会社 移动通信系统中处理分组数据的装置及方法
US6154443A (en) 1998-08-11 2000-11-28 Industrial Technology Research Institute FFT-based CDMA RAKE receiver system and method
CA2340716A1 (en) * 1998-08-18 2000-03-02 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
EP0993211B1 (en) 1998-10-05 2005-01-12 Sony International (Europe) GmbH Random access channel partitioning scheme for CDMA system
EP0993212B1 (en) 1998-10-05 2006-05-24 Sony Deutschland GmbH Random access channel partitioning scheme for CDMA system
EP1108317B1 (de) 1998-10-27 2002-08-28 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
US6266528B1 (en) 1998-12-23 2001-07-24 Arraycomm, Inc. Performance monitor for antenna arrays
US6310909B1 (en) 1998-12-23 2001-10-30 Broadcom Corporation DSL rate adaptation
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
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
RU2214688C2 (ru) 1999-07-08 2003-10-20 Самсунг Электроникс Ко., Лтд. Устройство и способ обнаружения скорости передачи данных для системы подвижной связи
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
US6735188B1 (en) 1999-08-27 2004-05-11 Tachyon, Inc. Channel encoding and decoding method and apparatus
US6278726B1 (en) 1999-09-10 2001-08-21 Interdigital Technology Corporation Interference cancellation in a spread spectrum communication system
US6115406A (en) 1999-09-10 2000-09-05 Interdigital Technology Corporation Transmission using an antenna array in a CDMA 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
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
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
EP1137217A1 (en) 2000-03-20 2001-09-26 Telefonaktiebolaget Lm Ericsson ARQ parameter negociation in a data packet transmission system using link adaptation
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
US6952454B1 (en) 2000-03-22 2005-10-04 Qualcomm, Incorporated Multiplexing of real time services and non-real time services for OFDM systems
US20020154705A1 (en) * 2000-03-22 2002-10-24 Walton Jay R. High efficiency high performance communications system employing multi-carrier modulation
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
EP1843622B1 (en) 2000-04-04 2009-12-30 Sony Deutschland Gmbh Event triggered change of access service class in a random access channel
US7403748B1 (en) 2000-04-07 2008-07-22 Nokia Coporation Multi-antenna transmission method and system
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
ATE357802T1 (de) 2000-04-18 2007-04-15 Aware Inc Datenzuweisung mit änderbaren signal- rauschabstand
US6751199B1 (en) 2000-04-24 2004-06-15 Qualcomm Incorporated Method and apparatus for a rate control in a high data rate communication system
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
EP1455493B1 (en) 2000-04-25 2005-11-30 Nortel Networks Limited Radio telecommunications system with reduced delays for data transmission
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
US6744811B1 (en) 2000-06-12 2004-06-01 Actelis Networks Inc. Bandwidth management for DSL modem pool
EP1198908B1 (en) 2000-06-12 2017-08-09 Samsung Electronics Co., Ltd. Method of assigning an uplink random access channel in a cdma mobile communication system
US7248841B2 (en) 2000-06-13 2007-07-24 Agee Brian G Method and apparatus for optimization of wireless multipoint electromagnetic communication networks
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
AU2001255253A1 (en) 2000-06-30 2002-01-14 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
AU2001267891A1 (en) 2000-07-03 2002-01-14 Matsushita Electric Industrial Co., Ltd. Base station unit and method for radio communication
EP2262157A3 (en) 2000-07-05 2011-03-23 Sony Deutschland Gmbh Pilot pattern design for a STTD scheme in an OFDM system
FI109393B (fi) 2000-07-14 2002-07-15 Nokia Corp Menetelmä mediavirran enkoodaamiseksi skaalautuvasti, skaalautuva enkooderi ja päätelaite
WO2002007327A1 (en) 2000-07-17 2002-01-24 Koninklijke Philips Electronics N.V. Coding of data stream
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
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
JP4176463B2 (ja) 2000-08-10 2008-11-05 富士通株式会社 送信ダイバーシチ通信装置
KR100526499B1 (ko) 2000-08-22 2005-11-08 삼성전자주식회사 두 개 이상 안테나를 사용하는 안테나 전송 다이버시티방법 및 장치
EP1182799A3 (en) 2000-08-22 2002-06-26 Lucent Technologies Inc. Method for enhancing mobile cdma communications using space-time transmit diversity
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
US6850481B2 (en) 2000-09-01 2005-02-01 Nortel Networks Limited Channels estimation for multiple input—multiple output, orthogonal frequency division multiplexing (OFDM) system
US6985434B2 (en) 2000-09-01 2006-01-10 Nortel Networks Limited Adaptive time diversity and spatial diversity for OFDM
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
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
FR2814014B1 (fr) 2000-09-14 2002-10-11 Mitsubishi Electric Inf Tech Methode de detection multi-utilisateur
US6760882B1 (en) 2000-09-19 2004-07-06 Intel Corporation Mode selection for data transmission in wireless communication channels based on statistical parameters
US6802035B2 (en) * 2000-09-19 2004-10-05 Intel Corporation System and method of dynamically optimizing a transmission mode of wirelessly transmitted information
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
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
US6980601B2 (en) 2000-11-17 2005-12-27 Broadcom Corporation Rate adaptation and parameter optimization for multi-band single carrier transmission
US7006464B1 (en) 2000-11-17 2006-02-28 Lucent Technologies Inc. Downlink and uplink channel structures for downlink shared channel system
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
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
US7050510B2 (en) 2000-12-29 2006-05-23 Lucent Technologies Inc. Open-loop diversity technique for systems employing four transmitter antennas
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
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
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
US8290098B2 (en) 2001-03-30 2012-10-16 Texas Instruments Incorporated Closed loop multiple transmit, multiple receive antenna wireless communication system
GB2373973B (en) 2001-03-30 2003-06-11 Toshiba Res Europ Ltd Adaptive antenna
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
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
CN100446612C (zh) 2001-05-04 2008-12-24 诺基亚公司 借助定向天线的许可控制
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
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
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
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
US20020183010A1 (en) 2001-06-05 2002-12-05 Catreux Severine E. Wireless communication systems with adaptive channelization and link adaptation
GB2376315B (en) 2001-06-05 2003-08-06 3Com Corp Data bus system including posted reads and writes
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
KR20040008230A (ko) 2001-06-27 2004-01-28 노오텔 네트웍스 리미티드 무선 통신 시스템에서 제어 정보의 통신
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
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
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
US7773699B2 (en) 2001-10-17 2010-08-10 Nortel Networks Limited Method and apparatus for channel quality measurements
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
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
WO2003039031A1 (fr) * 2001-10-31 2003-05-08 Matsushita Electric Industrial Co., Ltd. Dispositif d'emission radio et procede de communication radio
US7218684B2 (en) 2001-11-02 2007-05-15 Interdigital Technology Corporation Method and system for code reuse and capacity enhancement using null steering
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
AU2002224120A1 (en) 2001-11-28 2003-06-10 Fujitsu Limited Orthogonal frequency-division multiplex transmission method
US7263119B1 (en) 2001-11-29 2007-08-28 Marvell International Ltd. Decoding method and apparatus
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
US7099398B1 (en) 2001-12-18 2006-08-29 Vixs, Inc. Method and apparatus for establishing non-standard data rates in a wireless communication system
US7076514B2 (en) 2001-12-18 2006-07-11 Conexant, Inc. Method and system for computing pre-equalizer coefficients
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
US7573805B2 (en) 2001-12-28 2009-08-11 Motorola, Inc. Data transmission and reception method and apparatus
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
KR100547845B1 (ko) 2002-02-07 2006-01-31 삼성전자주식회사 고속 순방향 패킷 접속 방식을 사용하는 통신 시스템에서서빙 고속 공통 제어 채널 셋 정보를 송수신하는 장치 및방법
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
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
US6873651B2 (en) 2002-03-01 2005-03-29 Cognio, Inc. System and method for joint maximal ratio combining using time-domain signal processing
US6687492B1 (en) 2002-03-01 2004-02-03 Cognio, Inc. System and method for antenna diversity using joint maximal ratio combining
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
US20040198276A1 (en) 2002-03-26 2004-10-07 Jose Tellado Multiple channel wireless receiver
US7012978B2 (en) * 2002-03-26 2006-03-14 Intel Corporation Robust multiple chain 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
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
US7103325B1 (en) 2002-04-05 2006-09-05 Nortel Networks Limited Adaptive modulation and coding
US6804191B2 (en) 2002-04-05 2004-10-12 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
US7359313B2 (en) 2002-06-24 2008-04-15 Agere Systems Inc. Space-time bit-interleaved coded modulation for wideband transmission
US7095709B2 (en) 2002-06-24 2006-08-22 Qualcomm, Incorporated Diversity transmission modes for MIMO OFDM communication systems
US7613248B2 (en) 2002-06-24 2009-11-03 Qualcomm Incorporated Signal processing with channel eigenmode decomposition and channel inversion for MIMO systems
DE60311464T2 (de) 2002-06-27 2007-08-30 Koninklijke Philips Electronics N.V. Messung von kanaleigenschaften in einem 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
EP1379020A1 (en) 2002-07-03 2004-01-07 National University Of Singapore A wireless communication apparatus and method
US7912999B2 (en) 2002-07-03 2011-03-22 Freescale Semiconductor, Inc. Buffering method and apparatus for processing digital communication signals
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
DE60325612D1 (de) 2002-07-30 2009-02-12 Ipr Licensing Inc System und verfahren zur funkkommunikation mit mehreren eingängen und mehreren ausgängen (mimo)
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
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
US6850511B2 (en) 2002-10-15 2005-02-01 Intech 21, Inc. Timely organized ad hoc network and protocol for timely organized ad hoc network
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
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
US7274938B2 (en) 2002-10-22 2007-09-25 Texas Instruments Incorporated Wired control channel for supporting wireless communication in non-exclusive spectrum
US8169944B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Random access for wireless multiple-access communication systems
US8218609B2 (en) 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US8570988B2 (en) 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US8134976B2 (en) 2002-10-25 2012-03-13 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
AU2003285112B2 (en) 2002-10-25 2009-04-02 Qualcomm Incorporated Data detection and demodulation for wireless 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
US7151809B2 (en) 2002-10-25 2006-12-19 Qualcomm, Incorporated Channel estimation and spatial processing for TDD MIMO systems
US8208364B2 (en) 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US7324429B2 (en) 2002-10-25 2008-01-29 Qualcomm, Incorporated Multi-mode terminal in a wireless MIMO system
AU2002353638A1 (en) 2002-10-26 2004-05-13 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
US7583637B2 (en) 2003-01-31 2009-09-01 Alcatel-Lucent Usa Inc. Methods of controlling data rate in wireless communications systems
US7058367B1 (en) 2003-01-31 2006-06-06 At&T Corp. Rate-adaptive methods for communicating over multiple input/multiple output wireless 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
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
MXPA06000434A (es) 2003-07-11 2006-04-05 Qualcomm Inc Canal de enlace de avance compartido dinamico para un sistema de comunicacion inalambrico.
WO2005014820A1 (fr) 2003-08-08 2005-02-17 Si Chuan Heben Biotic Engineering Co. Ltd. 5-enolpyruvyl-3-phosphoshikimate synthase a bioresistance eleve au glyphosate et sequence de codage
ATE487291T1 (de) 2003-08-27 2010-11-15 Wavion Ltd Wlan-kapazitäts-erweiterung durch verwendung von 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
US8483105B2 (en) 2003-10-15 2013-07-09 Qualcomm Incorporated High speed media access control
US8842657B2 (en) 2003-10-15 2014-09-23 Qualcomm Incorporated High speed media access control with legacy system interoperability
US7508748B2 (en) 2003-10-24 2009-03-24 Qualcomm Incorporated Rate selection for a multi-carrier MIMO system
WO2005041515A1 (en) 2003-10-24 2005-05-06 Qualcomm Incorporated Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication 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
JP4425925B2 (ja) 2003-12-27 2010-03-03 韓國電子通信研究院 固有ビーム形成技術を使用するｍｉｍｏ−ｏｆｄｍシステム
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
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
US7486740B2 (en) 2004-04-02 2009-02-03 Qualcomm Incorporated Calibration of transmit and receive chains in a MIMO communication system
US7848442B2 (en) 2004-04-02 2010-12-07 Lg Electronics Inc. Signal processing apparatus and method in multi-input/multi-output communications systems
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
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
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
US7603141B2 (en) 2005-06-02 2009-10-13 Qualcomm, Inc. Multi-antenna station with distributed antennas
US8619620B2 (en) 2008-09-16 2013-12-31 Qualcomm Incorporated Methods and systems for transmission mode selection in a multi channel communication system
US20100260060A1 (en) 2009-04-08 2010-10-14 Qualcomm Incorporated Integrated calibration protocol for wireless lans

Also Published As

Publication number Publication date
EP2267927B1 (en) 2014-03-12
US20040146018A1 (en) 2004-07-29
CN1708936B (zh) 2011-05-11
TW201112671A (en) 2011-04-01
IL202480A0 (en) 2011-07-31
WO2004038985A2 (en) 2004-05-06
EP2267927A3 (en) 2012-05-16
RU2008106482A (ru) 2009-08-27
MXPA05004312A (es) 2005-08-03
CN1708936A (zh) 2005-12-14
US7324429B2 (en) 2008-01-29
AU2009213094A1 (en) 2009-10-08
RU2474060C2 (ru) 2013-01-27
EP2267927A2 (en) 2010-12-29
JP5296232B2 (ja) 2013-09-25
RU2329604C2 (ru) 2008-07-20
EP1556980A2 (en) 2005-07-27
TWI436617B (zh) 2014-05-01
CA2501285C (en) 2013-02-12
US8203978B2 (en) 2012-06-19
EP1556980B1 (en) 2012-07-11
JP5247976B2 (ja) 2013-07-24
US20080069015A1 (en) 2008-03-20
KR101041334B1 (ko) 2011-06-14
WO2004038985A3 (en) 2004-08-19
JP2006504340A (ja) 2006-02-02
AU2003287326A1 (en) 2004-05-13
AU2003287326C1 (en) 2009-10-29
BR0315607A (pt) 2005-08-23
JP2012142953A (ja) 2012-07-26
KR20050061536A (ko) 2005-06-22
TW200417187A (en) 2004-09-01
AU2003287326B2 (en) 2009-05-07
CA2501285A1 (en) 2004-05-06
RU2005115861A (ru) 2005-10-10

Similar Documents

Publication Publication Date Title
TWI337477B (en) Multi-mode terminal, access point, and method of processing data in a wireless mimo system
US7336746B2 (en) Data transmission with spatial spreading in a MIMO communication system
TWI338481B (en) A method and apparatus for pre-coding frequency divisoin duplexing system
KR100853641B1 (ko) Ｍｉｍｏ 통신 시스템에서 공간 확산을 통한 데이터 전송방법 및 장치
CN106850011B (zh) 使多天线发送自适应的方法和节点
EP1587223B1 (en) Detection process in a V-BLAST system
US9031097B2 (en) MIMO system with multiple spatial multiplexing modes
TWI358214B (en) Multi-antenna transmission for spatial division mu
EP2293464A1 (en) Method to determine precoding-weights based on channel state information in a mimo communication system
JP2006504339A5 (zh)
KR101399919B1 (ko) 분산된 채널 추정 및 프리코딩을 가진 ｍｉｍｏ 송신 시스템
JP2001237751A (ja) 通信システム中で信号を送信するための方法および装置および送信機およびｍｉｍｏシステム中で使用するための受信機
US20130021897A1 (en) Retransmission method and apparatus and communication system
CN101170316B (zh) 下行信道信息反馈和接收的方法及设备
US7839810B2 (en) Transmitter, communication system and communication method
US10999013B2 (en) Multiple stream space-time block coding
Alabed et al. Non-coherent distributed space–time coding techniques for two-way wireless relay networks
CN102246439B (zh) 实现mimo的hspa中的snir估计
KR102467175B1 (ko) 다중 시공간 선 부호화 및 복호화를 이용한 데이터 송수신 방법 및 시스템
TWI322603B (en) Derivation of eigenvectors for spatial processing in mimo communication systems
TWI422178B (zh) 於多天線系統中傳輸訊號之方法
JP2008147932A (ja) 受信信号の干渉信号を除去する復号装置及び復号方法

Legal Events

Date Code Title Description
MK4A Expiration of patent term of an invention patent