TWI387223B - 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理 - Google Patents

在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理 Download PDF

Info

Publication number
TWI387223B
TWI387223B TW094145927A TW94145927A TWI387223B TW I387223 B TWI387223 B TW I387223B TW 094145927 A TW094145927 A TW 094145927A TW 94145927 A TW94145927 A TW 94145927A TW I387223 B TWI387223 B TW I387223B
Authority
TW
Taiwan
Prior art keywords
time
frequency
symbol
user
orthogonal
Prior art date
Application number
TW094145927A
Other languages
English (en)
Other versions
TW200703947A (en
Inventor
Arak Sutivong
Avneesh Agrawal
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 TW200703947A publication Critical patent/TW200703947A/zh
Application granted granted Critical
Publication of TWI387223B publication Critical patent/TWI387223B/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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • H04L5/0021—Time-frequency-code in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/692—Hybrid techniques using combinations of two or more spread spectrum techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes
    • 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
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals
    • H04L5/026—Multiplexing of multicarrier modulation signals using code division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

在一正交上鏈中之多載波分碼多重接取(MC－CDMA)多工處理
本發明大體係關於通信，且更特定言之係關於用於支援一無線通信系統之一正交上鏈中之多載波分碼多重接取(MC－CDMA)的技術。
在一跳頻展頻(FHSS)通信系統中，資料在不同時間間隔中於不同頻率副頻帶或副載波展頻上傳輸，該等時間間隔亦稱為"跳頻週期"。此等頻率副頻帶可藉由正交分頻多工處理(OFDM)、其它多載波調變技術或某些其它構造而提供。使用FHSS，資料傳輸以一偽隨機方式自一副頻帶跳頻至另一副頻帶。此跳頻提供頻率分集且允許資料傳輸較佳地經受諸如窄帶干擾、人為干擾、衰落等等有害路徑效應。
一OFDMA系統利用OFDM且可同時支援多個使用者。對於一跳頻OFDMA系統，用於每一使用者之資料使用一指派給使用者之特殊跳頻(FH)序列而傳輸。FH序列指示特殊副頻帶用於每一跳頻週期中之資料傳輸。用於多個使用者之多資料傳輸可使用不同FH序列同時發送。此等FH序列定義為相互正交以使得在每一跳頻週期中僅一資料傳輸使用每一副頻帶。藉由使用正交FH序列，單元內干擾得以避免，且多資料傳輸在享受頻率分集之益處之同時不會相互干擾。
本文提供支援一無線通信系統之一正交上鏈中之MC－CDMA多工處理的技術。
在一態樣中，一種無線多載波通信之方法包含：將一上鏈上之副載波展頻劃分為非重疊組；配置至少一時頻區塊，每一時頻區塊具有一跳頻持續時間及一非重疊組；將一不同正交碼集指派給每一使用者；在經配置之至少一時頻區塊上擴展每一使用者之符號，其中每一使用者之符號使用指派給每一使用者之不同正交碼集而擴展；將每一符號映射至一在至少一時頻區塊中之調變符號；基於該等經映射符號產生一正交波形；及傳輸該正交波形。
在一態樣中，產生之正交波形係一正交分頻多工(OFDM)波形。在另一態樣中，產生之正交波形係一正交分頻多重接取(OFDMA)波形。
在一態樣中，一種用於無線多載波通信之裝置包含：用於將一上鏈上之副載波展頻劃分為非重疊組之構件；用於配置至少一時頻區塊之構件，每一時頻區塊具有一跳頻持續時間及一非重疊組；用於將一不同正交碼集指派給每一使用者之構件；用於在經配置之至少一時頻區塊上擴展每一使用者之符號之構件，其中每一使用者之符號使用指派給每一使用者之不同正交碼集而擴展；用於將每一符號映射至一在至少一時頻區塊中之調變符號之構件；用於基於該等經映射符號產生一正交波形之構件；及用於傳輸該正交波形之構件。
在另一態樣中，一電腦可讀媒體體現一種用於無線多載波通信之方法，其包含：將一上鏈上之副載波展頻劃分為非重疊組；配置至少一時頻區塊，每一時頻區塊具有一跳頻持續時間及一非重疊組；將一不同正交碼集指派給每一使用者；在經配置之至少一時頻區塊上擴展每一使用者之符號，其中每一使用者之符號使用指派給每一使用者之不同正交碼集而擴展；將每一符號映射至一在至少一時頻區塊中之調變符號；基於該等經映射符號產生一正交波形；及傳輸該正交波形。
在又一態樣中，一種用於無線多載波通信之裝置包含一控制器、一處理器及一傳輸器。該控制器可操作以：將一上鏈上之副載波展頻劃分為非重疊組；配置至少一時頻區塊，每一時頻區塊具有一跳頻持續時間及一非重疊組；及將一不同正交碼集指派給每一使用者。該處理器可操作以：在經配置之至少一時頻區塊上擴展每一使用者之符號，其中每一使用者之符號使用指派給每一使用者之不同正交碼集而擴展；及將每一符號映射至一在至少一時頻區塊中之調變符號。該傳輸器可操作以：基於該等經映射符號產生一正交波形；及傳輸該正交波形。
在一態樣中，一種在一無線多載波通信系統中之接收器包含：一天線，其用於接收一正交波形；一解調變器，其用於解調變該正交波形，藉此建立擴展符號；一處理器，其用於確定一來自該等擴展符號之時頻區塊；及一解擴展器，其用於使用一正交碼為一使用者解擴展該時頻區塊中的擴展符號。
下文進一步詳細論述本發明之各種態樣及實施例。
詞"例示性"在本文中用於意謂"用作一實例。例子或說明"。本文論述為"例示性"之任一實施例及設計不必解釋為比其它實施例或設計較佳或有利。
一OFDMA系統可以多個單元佈署，其中一單元通常係指一基地台及/或其覆蓋區域。一單元中之一給定副頻帶上之一資料傳輸充當對一相鄰單元中之相同副頻帶上的另一資料傳輸的干擾。為使單元間之干擾隨機化，用於每一單元之FH序列通常相對於相鄰單元之FH序列而定義為偽隨機的。藉由使用偽隨機FH序列，干擾分集達成，且一給定單元中用於一使用者之資料傳輸可經一足夠長時間週期觀察來自其它單元中用於其它使用者之資料傳輸的平均干擾。
單元間干擾可在任何給定時刻自副頻帶至副頻帶顯著地變化。為說明越過副頻帶之干擾之變化，在用於一資料傳輸之資料傳輸率之選擇中通常使用一範圍。若干擾之可變性較大，則通常需要一較大範圍以達成資料傳輸之一低封包錯誤率(PER)。較大範圍導致資料傳輸之資料傳輸率之較大減小，其限制系統容量。
跳頻可平均單元間干擾且減小所需範圍。增大跳頻率導致較佳干擾平均且減小所需範圍。快速跳頻率對於越過多個跳頻將資料編碼之特定類型傳輸尤其有利，且其不可使用其它技術如自動請求重傳(ARQ)以減輕干擾之有害效應。
具有一FH－OFDMA上鏈之多載波分碼多重接取(MC－CDMA)系統係一基於CDMA方案與正交分頻多工處理(OFDM)訊號傳輸之組合的通信系統。由於即使在通過一多路徑頻道之後仍可保存經多工處理訊號之間的正交性(假定使用者與一基地台之間之精確時間及頻率同步)，因此MC－CDMA係下鏈上之有效傳輸技術，藉此允許在接收器處之經多工處理訊號的可靠分離。
另一方面，MC－CDMA尚未與一上鏈上之多重接取技術一樣成功。上鏈傳輸與下鏈傳輸係固有地不同，表現在來自不同使用者之經傳輸訊號受不同頻道影響。歸因於多工處理之本質及對MC－CDMA之頻道估計誤差之敏感性，必須留出一不成比例量之系統資源用於頻道估計以使得此技術能在上鏈上運行。此外，由於使用者見到不同頻道，都蔔勒位移，上鏈上之同步係一更複雜問題，且經常在離基地台不同距離處。
然而，在一FH－OFDMA上鏈之情形中MC－CDMA作為一多工處理技術之一仔細應用可導致顯著資源利用率改良，尤其在用於低頻譜效率傳輸之頻寬利用方面。
在FH－OFDMA中，一上鏈上之使用者隨時間而被指派副載波展頻及跳頻之子集。跳頻幫助隨時間而改良頻率分集及干擾平均。在一實施例中，上鏈上之副載波展頻劃分為非重疊組且每一組獨立地跳頻。由於來自連續副載波展頻之頻道(在一組內)經期望係高度相關的，所以其頻道可使用普通導頻訊號符號估計，其導致導頻訊號額外負擔之顯著節約(與一具有隨機副載波展頻跳頻之佈署相比)。此外，FH－OFDMA使用一閉環上鏈時間控制機制以確保所有上鏈訊號在一較小時間窗(意即，在一循環前置項持續時間內)到達，其幫助促進符號間干擾(ISI)及載波展頻間干擾(ICI)之減輕。
在一實施例中，FH－OFDMA越過不同使用者或越過來自相同使用者之不同訊號支援MC－CDMA多工處理。圖1說明根據一實施例之FH－OFDMA之情形中之MC－CDMA的概念。水平軸係用於OFDM符號102。垂直軸係用於副載波展頻104。
實例假定8載波展頻組跳過8個OFDM符號。同樣地，每一時頻區塊106中存在64個調變符號。圖中繪示用於一時頻區塊的跳頻持續時間108及載波展頻關聯(carrier association)110。
在一實施例中，在一時頻區塊中的時間及頻率係連續。一時頻區塊係OFDM符號及副載波展頻之連續配置。或者，在一時頻區塊中的頻率係不連續，但是屬於相同時頻區塊之部分的頻率係相互正交。
每一使用者被指派一不同正交碼集，該碼集用於在經配置時頻區塊上擴展個別資料(或導頻訊號)符號。正交碼之實例包括Walsh碼及Gold碼，其在此項技術中均為已知的。
在擴展之後，每一符號映射至經指派時頻區塊中之調變符號之一。接著基於此等符號產生一相應OFDMA波形(遵循標準OFDMA波形產生技術)。如可見，多個使用者正共用相同時頻配置；一與傳統FH－OFDMA之顯著區別，其中使用者被指派不同時頻配置集以確保正交性。在一組及跳頻持續時間中適當選擇副載波展頻之數目的情況下，不同使用者之個別頻道似乎在某時頻配置上係恆定的，藉此允許使用者基於指派給不同使用者之唯一擴展簽名/代碼而分離。
來自不同使用者之MC－CDMA訊號在相同時頻配置上予以多工處理。一來自每一使用者之個別頻道期望在每一時頻配置上係恆定的，藉此允許在接收器處之分離。
此技術對於在上鏈上之相同時頻配置上多工處理來自不同使用者之低頻譜效率傳輸(例如，導頻訊號符號、ACK/NACK符號等)尤其有效。此外，在某些情況中，此技術亦可用於幫助減輕鏈路預算限制。
舉例而言，考慮上鏈上之一位元傳輸(例如，一導頻訊號或ACK/NACK符號)。為滿足效能需求，必須達成某經接收SNR量。一使用者可在一很高功率下一次傳輸來傳輸該位元，或在一較低功率下之若干次傳輸(例如，通過重複)來傳輸該位元。前者之技術導致高頻寬效率(意即，僅需要一次傳輸)但可能遭遇鏈路預算限制，且更糟的是，歸因於頻率/干擾分集之缺乏而遭遇不良效能。替代方法係經若干次傳輸來傳輸此一位元。為改良頻率/干擾分集，每一傳輸可在不同頻率及/或時間瞬間發生。此方法將可能導致在接收器處之更可靠偵測，但此係以更大頻寬額外負擔及可能更長的傳輸時間為代價的。一ACK/NACK位元之傳輸時間愈長，導致傳輸器之處理時間愈少，尤其在一使用H－ARQ之系統中。
一折衷辦法係使用一傳輸技術，其能夠儲備足夠量之頻率/干擾分集，同時仍使用合理量之頻寬。可使用先前考慮之具有連續載波展頻組跳頻之結構。在此配置中，一使用者在多個時頻區塊上傳輸一位元數量以收集頻率/干擾分集。此外，多個使用者在一特定時頻區塊上經正交地多工處理以使總頻寬消耗最小。為說明此後者，考慮其中一使用者通過M次傳輸傳輸一位元數量的情況。假定N次傳輸屬於一特定時頻區塊(意即，一使用者通過一全部M/N組塊傳輸)。同樣地，一使用者需要來自每一組塊之N個調變符號。假定每時頻區塊存在全部K個調變符號，每一組塊可接著支援至多K/N個使用者。明顯地，若頻道在每一時頻區塊上保持相當恆定(在時間及頻率上)，則可容易地應用MC－CDMA多工處理技術。對於該目的，每一使用者被指派正交碼序列之一以調變一個別資料符號。經正交擴展之符號接著放在適當副載波展頻上，自該等副載波展頻可產生一OFDM波形。
藉由將一正交碼序列指派給每一使用者，最多K個使用者可在每一時頻區塊中多工處理，同時仍能夠收集相同量之能量(在解擴展之後)。另外，由於每一使用者現正在整個時頻區塊上傳輸，因此鏈路預算之節約係一即時副產品。鏈路預算節約主要來自每一使用者經一更長持續時間傳輸之事實。
亦可普及此傳輸技術以在一配置中運行，在該配置中使用者一次傳輸多於僅一位元。詳言之，修正每一使用者之傳輸使得多個使用者可在每一時頻區塊上多工處理通常係可能的(意即，通過一慎重擴展)。然而，真正頻寬節約真正來自當重複代碼(其為一擴展形式)係傳輸固有的時。
在一FH－OFDMA配置中，一重複代碼作為一減輕鏈路預算限制之構件亦為有用的。舉例而言，歸因於一鏈路預算限制，當通過一次傳輸傳輸一經編碼符號時，一使用者可能不能夠滿足經接收SNR需要。一種避免此之方法係通過多次傳輸來傳輸每一經編碼符號，每一次以更低功率在不同時間瞬間(意即，通過重複)。明顯地，藉由應用經提議之使用者多工處理技術，當將頻寬額外負擔限制在一最小值時可達成所需結果。
圖2展示一終端機220x之一實施例之方塊圖，該終端機係OFDMA系統200中之終端機之一。為簡單起見，圖2僅展示終端機220x之傳輸器部分。
在終端機220x內，一編碼器/交錯器212自一資料源210接收訊務資料且自一控制器240接收可能的控制資料及其它資料。編碼器/交錯器212格式化、編碼且交錯經接收資料以提供經編碼資料。一調變器214接著根據一或多個調變方案(例如，QPSK、M－PSK、M－QAM等)調變經編碼資料以提供調變符號(或簡稱為"資料符號")。每一調變符號係一用於使用於調變符號之調變方案的一訊號群中之一特定點的複合值(complex value)。
一OFDM調變器220執行用於資料符號之跳頻及OFDM處理。在OFDM調變器220內，一TX FH處理器222接收資料符號且在藉由一用於一指派給終端機220x之訊務頻道之FH序列確定的適當副頻帶上提供此等資料符號。此FH序列指示特定副頻帶在每一跳頻週期中使用且由控制器240提供。TX FH處理器222提供資料符號。資料符號以一由FH序列確定之偽隨機方式自一副頻帶動態地跳頻至另一副頻帶。對於每一OFDM符號週期，TX FH處理器222提供N個"傳輸"符號用於N個副頻帶。此等N個傳輸符號由使用於資料傳輸(若資料正傳輸)之副頻帶之一資料符號及未使用於資料傳輸之每一副頻帶的一零訊號值組成。
一反向快速傅立葉轉換(IFFT)單元224接收N個傳輸符號用於每一OFDM符號週期。IFFT單元224接著將N個傳輸符號轉換至使用一N點反向FFT之時域以獲得一含有N個時域"資料"碼片之"經轉換"符號。每一資料碼片係一在一碼片週期中傳輸之複合值。(碼片率係關於系統之總頻寬。)一循環前置項產生器226接收N個資料碼片用於每一經轉換符號且重複該經轉換符號之一部分以形成一含有N+Cp 個資料碼片之OFDM符號，其中Cp 係重複之資料碼片的數目。該經重複部分通常稱作一循環前置項且用於對抗由頻率選擇衰落引起之符號間干擾(ISI)。一OFDM符號週期對應於一OFDM符號之持續時間，其為N+Cp 碼片週期。循環前置項產生器226提供一資料碼片流用於一OFDM符號流。
一傳輸(TX)導頻訊號處理器230接收資料碼片流及至少一導頻訊號符號。TX導頻訊號處理器230產生一窄頻導頻訊號。TX導頻訊號處理器230提供一"傳輸"碼片流。一傳輸器單元(TMTR)232處理該傳輸碼片流以獲得一經調變訊號，其自一天線234傳輸至基地台。
圖3展示一基地台210x之一實施例之方塊圖，該基地台係OFDMA系統200中之基地台之一。為簡單起見，圖3僅展示基地台210x之接收器部分。
由終端機220x傳輸之經調變訊號藉由天線252而接收。來自天線252之經接收訊號提供給一接收器單元(RCVR)254且藉由其處理以提供樣本。接收器單元254可進一步執行樣本率轉換(自接收器樣本率至碼片率)、頻率/相位校正及對該等樣本之其它預處理。接收器單元254提供一"經接收"碼片流。
一接收(RX)導頻訊號處理器260接收且處理該經接收碼片流，以恢復窄頻導頻訊號及藉由終端機220x傳輸之資料碼片。下文論述用於RX導頻訊號處理器260之若干設計。RX導頻訊號處理器260將一經接收資料碼片流提供至一OFDM解調變器270，且將頻道增益估計提供至一數位訊號處理器(DSP)262。如下文所述，DSP 262處理頻道增益估計，以獲得使用於資料解調變之頻道響應估計。
在OFDM解調變器270內，一循環前置項移除單元272接收該經接收資料碼片流且移除附加至每一經接收OFDM符號之循環前置項，以獲得一經接收轉換符號。一FFT單元274接著將每一經接收轉換符號轉換為至使用一N點FFT之頻域，以獲得用於N個副頻帶的N個經接收符號。一RX FH處理器276在每一OFDM符號週期獲得N個經接收符號，且在該OFDM符號週期提供來自適當副頻帶之經接收符號作為經接收資料符號。在每一OFDM符號週期中，用以自其獲得經接收資料符號之特定副頻帶係藉由用於指派給終端機220x之訊務頻道的FH序列予以確定。此FH序列係藉由一控制器290予以提供。由於藉由終端機220x之資料傳輸動態地自一副頻帶跳頻至另一副頻帶，因此RX FH處理器276協同終端機220x中的TX FH處理器222運作且提供來自適當副頻帶之經接收資料符號。在基地台210x之RX FH處理器276使用之FH序列相同於在終端機220x之TX FH處理器222使用之FH序列。此外，基地台210x處及終端機220x處之FH序列係同步的。RX FH處理器276將一經接收資料符號流提供至一解調變器280。
解調變器280接收且連貫地解調變來自DSP 262之具有頻道響應估計之經接收資料符號，以獲得經恢復資料符號。頻道響應估計係用於使用於資料傳輸之副頻帶。解調變器280進一步解映射經恢復資料符號以獲得經解調變資料。一解交錯器/解碼器282接著解交錯且解碼該經解調變資料以提供經解碼資料，其可提供至一資料儲集器284用於儲存。一般而言，藉由基地台210x中之單元之處理係互補於藉由終端機420x中的相應單元執行之處理。
控制器240及290分別導引在終端機220x及基地台210x之操作。記憶體單元242及292分別提供儲存用於由控制器240及290使用之程式碼及資料。控制器240及290亦可執行與導頻訊號相關之處理。舉例而言，當應分別傳輸且接收一用於終端機220x之窄頻導頻訊號時，控制器240及290可確定時間間隔。
為清楚起見，圖2及3分別展示反向鏈路上之導頻訊號及資料之傳輸及重複。可執行類似或不同處理用於前向鏈路上之導頻訊號及資料傳輸。
本文論述之技術可使用於一跳頻OFDMA系統以及其它無線多載波通信系統。舉例而言，此等技術可用於使用諸如離散多頻道(discrete multi－tone；DMT)之其它多載波調變技術的系統。
本文論述之技術可使用於一分時雙工處理(TDD)佈署中之有效窄頻上鏈導頻訊號傳輸。節約係在用於每一使用者之系統頻寬及鏈路預算中。舉例而言，給定三個使用者，其每一者通過三個時槽傳輸一符號，每一使用者通過三個時槽以1/3傳輸功率傳輸其符號。
本文論述之技術可在傳輸器及接收器處藉由各種構件實施。在傳輸器及接收器處之導頻訊號及資料處理可在硬體、軟體或其組合中執行。對於一硬體實施，處理單元(例如，TX導頻訊號處理器230、RX導頻訊號處理器260、DSP 222等)可在一或多個特殊應用積體電路(ASIC)、數位訊號處理器(DSP)、數位訊號處理設備(DSPD)、可程式邏輯設備(PLD)、場可程式化閘陣列(FPGA)、處理器、控制器、微控制器、經設計以執行本文所述之功能的其它電子單元或其組合內實施。
對於一軟體實施，在傳輸器及接收器處之導頻訊號及資料處理可以執行本文所述之功能的模組(例如，程序、函式等)實施。軟體程式碼可儲存於記憶體單元(例如，圖2及3中之記憶體單元242及292)中且藉由處理器(例如，控制器240及290)執行。記憶體單元可在處理器內或處理器外部實施，在該情形中其可經由如此項技術中已知之各種構件通信地耦接至處理器。
提供所揭示實施例之先前描述以使得任一熟習此項技術者能夠製造或使用本發明。熟習此項技術者將易於瞭解對此等實施例之各種修正，且本文定義之一般原則可應用於其它實施例而不脫離本發明之精神或範疇。因此，本發明不希望限於本文所示之實施例而與本文揭示之原則及新奇特徵最廣泛地一致。
102．．．OFDM符號
104．．．副載波展頻
106．．．時頻區塊
108．．．跳頻持續時間
110．．．載波展頻關聯
210．．．資料源
212．．．編碼器/交錯器
214．．．調變器
220．．．OFDM調變器
222．．．TX FH處理器
224．．．IFFT單元
226．．．循環前置項產生器
230．．．TX導頻訊號處理器
232．．．TMTR
234．．．天線
240．．．控制器
242．．．記憶體
220x．．．終端機
210x．．．基地台
252．．．天線
254．．．RCVR
260．．．RX導頻訊號處理器
262．．．數位訊號處理器
270．．．OFDM解調變器
272．．．循環前置項移除單元
274．．．FFT單元
276．．．RX FH處理器
280．．．解調變器
282．．．解交錯器/解碼器
284．．．資料儲集器
290．．．控制器
292．．．記憶體
圖1說明根據一實施例之FH－OFDMA之情形中之MC－CDMA的概念；圖2展示根據一實施例之終端機之方塊圖；圖3展示根據一實施例之基地台之方塊圖。
102．．．OFDM符號
104．．．副載波展頻
106．．．時頻區塊
108．．．跳頻持續時間
110．．．載波展頻關聯

Claims (14)

  1. 一種無線多載波通信之方法，其包含：將一上鏈上之副載波展頻劃分為非重疊組；配置至少一時頻區塊，每一時頻區塊具有一跳頻持續時間及一非重疊組，其中每一非重疊組獨立於其他非重疊組而跳頻；將一不同正交碼集指派給每一使用者；在一時頻區塊上擴展多個使用者之符號，其中每一使用者之該等符號係使用指派給每一使用者之不同正交碼集而擴展；將每一擴展符號映射至一在該至少一時頻區塊中之調變符號；基於該等經映射符號來產生一正交波形；及傳輸該正交波形。
  2. 如請求項1之方法，其中劃分副載波展頻進一步包含將連續副載波展頻劃分為一非重疊組。
  3. 如請求項1之方法，其中產生該正交波形包含產生一正交分頻多工(OFDM)波形，且其中傳輸該正交波形包含傳輸該OFDM波形。
  4. 如請求項1之方法，其中產生該正交波形包含產生一正交分頻多重接取(OFDMA)波形，且其中傳輸該正交波形包含傳輸該OFDMA波形。
  5. 如請求項1之方法，其中擴展符號包含擴展導頻訊號符號。
  6. 如請求項1之方法，其中擴展符號包含擴展ACK/NACK符號。
  7. 如請求項1之方法，其中擴展符號包含擴展CQI符號。
  8. 如請求項1之方法，其中擴展符號包含擴展請求符號。
  9. 如請求項1之方法，其中該等正交碼係Walsh碼。
  10. 如請求項1之方法，其中該等正交碼係Gold碼。
  11. 一種用於無線多載波通信之裝置，其包含：用於將一上鏈上之副載波展頻劃分為非重疊組之構件；用於配置至少一時頻區塊之構件，每一時頻區塊具有一跳頻持續時間及一非重疊組，其中每一非重疊組獨立於其他非重疊組而跳頻；用於將一不同正交碼集指派給每一使用者之構件；用於在一時頻區塊上擴展多個使用者之符號之構件，其中每一使用者之該等符號係使用指派給每一使用者之不同正交碼集而擴展；用於將每一擴展符號映射至一在該至少一時頻區塊中之調變符號之構件；用於基於該等經映射符號來產生一正交波形之構件；及用於傳輸該正交波形之構件。
  12. 一種用於無線多載波通信之裝置，其包含：一控制器，其可操作以：將一上鏈上之副載波展頻劃分為非重疊組； 配置至少一時頻區塊，每一時頻區塊具有一跳頻持續時間及一非重疊組，其中每一非重疊組獨立於其他非重疊組而跳頻；及將一不同正交碼集指派給每一使用者；一處理器，其可操作以：在一時頻區塊上擴展多個使用者之符號，其中每一使用者之該等符號係使用指派給每一使用者之不同正交碼集而擴展；及將每一符號映射至一在該至少一時頻區塊中之調變符號；及一傳輸器，其可操作以：基於該等經映射符號來產生一正交波形；及傳輸該正交波形。
  13. 一種一無線多載波通信系統之接收器，其中至少一時頻區塊被配置，每一時頻區塊具有一跳頻持續時間及一非重疊組，其中每一非重疊組獨立於其他非重疊組而跳頻，該接收器包含：一天線，其用於接收一正交波形，該正交波形包含使用指派給每一使用者之不同正交碼集而在一時頻區塊上上擴展之多個使用者之符號；一解調變器，其用於解調變該正交波形，藉此建立擴展符號；一處理器，其用於確定一來自該等擴展符號之時頻區 塊；及一解擴展器，其用於使用一正交碼為一使用者解擴展該時頻區塊中的該等擴展符號。
  14. 一種非暫時性的電腦可讀媒體，其體現可由一處理器執行之程式碼以實施一用於無線多載波通信之方法，該方法包含：將一上鏈上之副載波展頻劃分為非重疊組；配置至少一時頻區塊，每一時頻區塊具有一跳頻持續時間及一非重疊組，其中每一非重疊組獨立於其他非重疊組而跳頻；將一不同正交碼集指派給每一使用者；在一時頻區塊上擴展多個使用者之符號，其中每一使用者之該等符號係使用指派給每一使用者之不同正交碼集而擴展；將每一擴展符號映射至一在該至少一時頻區塊中之調變符號；基於該等經映射符號產生一正交波形；及傳輸該正交波形。
TW094145927A 2004-12-22 2005-12-22 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理 TWI387223B (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/022,145 US8831115B2 (en) 2004-12-22 2004-12-22 MC-CDMA multiplexing in an orthogonal uplink

Publications (2)

Publication Number Publication Date
TW200703947A TW200703947A (en) 2007-01-16
TWI387223B true TWI387223B (zh) 2013-02-21

Family

ID=36190622

Family Applications (4)

Application Number Title Priority Date Filing Date
TW101111962A TWI451705B (zh) 2004-12-22 2005-12-22 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理
TW094145927A TWI387223B (zh) 2004-12-22 2005-12-22 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理
TW101111964A TWI483559B (zh) 2004-12-22 2005-12-22 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理
TW101111967A TWI439060B (zh) 2004-12-22 2005-12-22 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理

Family Applications Before (1)

Application Number Title Priority Date Filing Date
TW101111962A TWI451705B (zh) 2004-12-22 2005-12-22 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理

Family Applications After (2)

Application Number Title Priority Date Filing Date
TW101111964A TWI483559B (zh) 2004-12-22 2005-12-22 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理
TW101111967A TWI439060B (zh) 2004-12-22 2005-12-22 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理

Country Status (14)

Country Link
US (4) US8831115B2 (zh)
EP (2) EP2372923B1 (zh)
JP (6) JP2008526121A (zh)
KR (1) KR20070086928A (zh)
CN (1) CN101112005B (zh)
AR (1) AR052435A1 (zh)
AU (1) AU2005319083B2 (zh)
BR (1) BRPI0519540B1 (zh)
CA (1) CA2591478C (zh)
IL (1) IL184001A0 (zh)
MX (1) MX2007007775A (zh)
RU (1) RU2384945C2 (zh)
TW (4) TWI451705B (zh)
WO (1) WO2006069299A1 (zh)

Families Citing this family (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7551546B2 (en) * 2002-06-27 2009-06-23 Nortel Networks Limited Dual-mode shared OFDM methods/transmitters, receivers and systems
US7042857B2 (en) 2002-10-29 2006-05-09 Qualcom, Incorporated Uplink pilot and signaling transmission in wireless communication systems
US8611283B2 (en) * 2004-01-28 2013-12-17 Qualcomm Incorporated Method and apparatus of using a single channel to provide acknowledgement and assignment messages
US8891349B2 (en) 2004-07-23 2014-11-18 Qualcomm Incorporated Method of optimizing portions of a frame
US8238923B2 (en) * 2004-12-22 2012-08-07 Qualcomm Incorporated Method of using shared resources in a communication system
US8831115B2 (en) 2004-12-22 2014-09-09 Qualcomm Incorporated MC-CDMA multiplexing in an orthogonal uplink
SI1858186T1 (en) 2005-03-10 2018-03-30 Panasonic Intellectual Property Corporation Of America Radio receiving device and radio transmitting device
US7564828B2 (en) * 2005-04-18 2009-07-21 Via Telecom Co., Ltd. Power-efficient signaling for asymmetric multi-carrier communications
US7672286B2 (en) * 2005-04-18 2010-03-02 Via Telecom Co., Ltd. Reverse-link structure for a multi-carrier communication system
US8670493B2 (en) 2005-06-22 2014-03-11 Eices Research, Inc. Systems and/or methods of increased privacy wireless communications
EP3641158A1 (en) * 2005-09-30 2020-04-22 Apple Inc. Mimo communication system
WO2007091157A2 (en) * 2006-02-08 2007-08-16 Nokia Corporation Apparatus, method and computer program product providing a transport format that is compatible with another transport format that uses spreading codes
US20070223614A1 (en) * 2006-03-23 2007-09-27 Ravi Kuchibhotla Common time frequency radio resource in wireless communication systems
US20100165913A1 (en) * 2006-04-26 2010-07-01 Agency For Science Technology And Research Methods of transmitting and receiving data
JP5237288B2 (ja) * 2006-06-16 2013-07-17 クゥアルコム・インコーポレイテッド ビーコン信号における情報の符号化
US8259823B2 (en) * 2006-07-27 2012-09-04 Altair Semiconductor Ltd. Energy-efficient uplink slot allocation in time-frequency division multiple access systems
US7649951B2 (en) 2006-08-16 2010-01-19 Harris Corporation System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM) with applied frequency domain spreading
US7813433B2 (en) * 2006-08-16 2010-10-12 Harris Corporation System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM) with selected subcarriers turned on or off
US7860147B2 (en) * 2006-08-16 2010-12-28 Harris Corporation Method of communicating and associated transmitter using coded orthogonal frequency division multiplexing (COFDM)
US7903749B2 (en) 2006-08-16 2011-03-08 Harris Corporation System and method for applying frequency domain spreading to multi-carrier communications signals
US7751488B2 (en) * 2006-08-16 2010-07-06 Harris Corporation System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM)
US8174995B2 (en) * 2006-08-21 2012-05-08 Qualcom, Incorporated Method and apparatus for flexible pilot pattern
US8978103B2 (en) * 2006-08-21 2015-03-10 Qualcomm Incorporated Method and apparatus for interworking authorization of dual stack operation
KR100973118B1 (ko) 2006-08-21 2010-07-29 콸콤 인코포레이티드 듀얼 스택 동작의 인가를 인터워킹하기 위한 방법 및 장치
US8457221B2 (en) * 2006-09-08 2013-06-04 Qualcomm Incorporated Signaling transmission with localized spreading for wireless communication
MX2009003608A (es) 2006-10-02 2009-04-22 Lg Electronics Inc Metodo para transmitir una señal de control de enlace descendente.
MX2009003609A (es) 2006-10-02 2009-04-22 Lg Electronics Inc Metodo para transmitir una señal de control utilizando multiplexion eficiente.
RU2438238C2 (ru) * 2006-10-03 2011-12-27 Нтт Досомо, Инк. Пользовательское устройство, базовая станция и способ передачи данных
JP4629056B2 (ja) 2006-10-03 2011-02-09 株式会社エヌ・ティ・ティ・ドコモ ユーザ装置、送信方法及び通信システム
US9264183B2 (en) * 2006-10-24 2016-02-16 Qualcomm Incorporated Acknowledgment channel for wireless communications
WO2008075890A1 (en) * 2006-12-18 2008-06-26 Samsung Electronics Co., Ltd. Method and apparatus for transmitting/receiving data and control information through an uplink in a wireless communication system
JP5166287B2 (ja) * 2007-01-09 2013-03-21 株式会社エヌ・ティ・ティ・ドコモ 基地局装置及び通信制御方法
WO2008097037A1 (en) * 2007-02-07 2008-08-14 Samsung Electronics Co., Ltd. Method and apparatus for multiplexing frequency hopping in a communication system
ES2902275T3 (es) 2007-03-19 2022-03-25 Lg Electronics Inc Un método de asignación de recursos y un método para transmitir/recibir información de asignación de recursos en un sistema de comunicación móvil
KR101049138B1 (ko) 2007-03-19 2011-07-15 엘지전자 주식회사 이동 통신 시스템에서, 수신확인신호 수신 방법
CN101669397B (zh) * 2007-04-24 2013-11-13 株式会社Ntt都科摩 移动通信方法以及无线基站
KR100913090B1 (ko) 2007-06-13 2009-08-21 엘지전자 주식회사 통신 시스템에서 확산 신호를 송신하는 방법
KR100908063B1 (ko) 2007-06-13 2009-07-15 엘지전자 주식회사 이동 통신 시스템에서 확산신호를 송신하는 방법
KR100900289B1 (ko) 2007-06-21 2009-05-29 엘지전자 주식회사 직교 주파수 분할 다중화 시스템에서 제어 채널을 송수신하는 방법
JP4762203B2 (ja) * 2007-06-29 2011-08-31 株式会社東芝 Ｏｆｄｍ信号の送信方法、ｏｆｄｍ送信機及びｏｆｄｍ受信機
CN101340273B (zh) * 2007-07-04 2011-01-05 华为技术有限公司 多址接入方法、装置及系统
CN101340230B (zh) * 2007-07-05 2012-12-19 中兴通讯股份有限公司 时分同步码分多址上行增强系统的随机接入方法
KR101548324B1 (ko) * 2007-08-08 2015-09-07 한국전자통신연구원 무선통신시스템에서 신호형성방법 및 장치
CN101409583B (zh) * 2007-10-11 2013-02-13 电信科学技术研究院 信号发送方法、信号发送装置
KR101533457B1 (ko) * 2007-11-29 2015-07-03 엘지전자 주식회사 무선통신 시스템에서 제어신호 전송방법
US8855630B2 (en) * 2008-02-08 2014-10-07 Qualcomm Incorporated Enhanced multiplexing system and technique for uplink control channels
KR101492566B1 (ko) * 2008-03-26 2015-02-12 삼성전자주식회사 광대역 무선통신 시스템에서 복합 자동 재전송 요청을지원하기 위한 장치 및 방법
WO2009131142A1 (ja) * 2008-04-23 2009-10-29 シャープ株式会社 通信システム、送信機、受信機及び通信方法
CN101610101B (zh) * 2008-06-16 2013-02-27 中兴通讯股份有限公司 一种下行专用导频的跳频方法
CN101610231B (zh) * 2008-06-18 2013-06-05 中兴通讯股份有限公司 跳频实现方法和装置
US8165232B2 (en) * 2008-10-01 2012-04-24 Harris Corporation Low peak-to-average power ratio (PAPR) preamble for orthogonal frequency division multiplexing (OFDM) communications
US8160165B2 (en) * 2008-10-01 2012-04-17 Harris Corporation Orthogonal frequency division multiplexing (OFDM) communications device and method that incorporates low PAPR preamble and frequency hopping
CN102301625B (zh) * 2009-01-29 2014-07-09 松下电器产业株式会社 无线发送装置和参考信号发送方法
US8451798B2 (en) 2009-06-18 2013-05-28 Industrial Technology Research Institute Carrier configuration method for multi-carrier communication system
US8934446B2 (en) * 2009-10-02 2015-01-13 Lg Electronics Inc. Transmission method and device for a downlink reference signal
US9232500B2 (en) 2009-11-03 2016-01-05 Nokia Solutions And Networks Oy Method and apparatus for interference-resistant wireless communications
GB2491876A (en) * 2011-06-15 2012-12-19 Xsilon Ltd Bit loading in a time and frequency/code divisional multiplexing method
US20130301563A1 (en) * 2012-05-11 2013-11-14 Samsung Electronics Co., Ltd Pilot design for millimeter wave broadband
CN103795666A (zh) * 2012-11-02 2014-05-14 普天信息技术研究院有限公司 一种专网通信系统中发送下行导频的方法
EP2728786A1 (en) * 2012-11-05 2014-05-07 Alcatel Lucent Apparatuses, methods, and computer programs for a receiver and a transmitter of a wireless system
US9692550B2 (en) 2012-11-29 2017-06-27 Huawei Technologies Co., Ltd. Systems and methods for waveform selection and adaptation
US9258098B2 (en) 2013-07-20 2016-02-09 Cisco Technology, Inc. Exclusive and overlapping transmission unit allocation and use in a network
KR102697299B1 (ko) * 2015-09-07 2024-08-23 코히어 테크널러지스, 아이엔씨. 직교 시간 주파수 공간 변조를 이용한 다중액세스
WO2017117795A1 (zh) * 2016-01-08 2017-07-13 华为技术有限公司 一种信号的发送方法、接收方法、终端设备、基站及系统
EP3193481B1 (en) * 2016-01-14 2020-03-11 Huawei Technologies Co., Ltd. Asymmetric filtering at edges of band consisting of overlapped sub-bands
WO2018024127A1 (zh) * 2016-07-30 2018-02-08 华为技术有限公司 一种传输信号的方法及网络设备
CN112448760B (zh) 2019-08-31 2022-07-29 华为技术有限公司 一种获取发射机测试参数的方法和装置以及存储介质
US10848348B1 (en) * 2019-09-09 2020-11-24 GM Global Technology Operations LLC Low-complexity channel estimator for OFDM receivers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040228267A1 (en) * 2003-05-12 2004-11-18 Avneesh Agrawal Fast frequency hopping with a code division multiplexed pilot in an OFDMA system

Family Cites Families (266)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346473A (en) 1980-02-26 1982-08-24 Harris Corporation Error correction coding method and apparatus for multilevel signaling
CA1220830A (en) 1984-12-28 1987-04-21 David S. Drynan Transmitting sequence numbers of information in a packet data transmission system
US4850036A (en) 1987-08-21 1989-07-18 American Telephone And Telegraph Company Radio communication system using synchronous frequency hopping transmissions
US5005852A (en) * 1989-08-23 1991-04-09 Smyly George M Sr Separative trailer tongue hitching method
US5519730A (en) 1990-06-12 1996-05-21 Jasper; Steven C. Communication signal having a time domain pilot component
IL100213A (en) 1990-12-07 1995-03-30 Qualcomm Inc Mikrata Kedma phone system and its antenna distribution system
US5315636A (en) 1991-06-28 1994-05-24 Network Access Corporation Personal telecommunications system
JPH05110499A (ja) * 1991-10-14 1993-04-30 Nippon Telegr & Teleph Corp <Ntt> 移動通信方式
IL103620A0 (en) 1992-11-03 1993-04-04 Rafael Armament Dev Authority Spread-spectrum,frequency-hopping radiotelephone system
GB9206667D0 (en) 1992-03-27 1992-05-13 Ici Plc Purification process
US5282222A (en) 1992-03-31 1994-01-25 Michel Fattouche Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum
US5404355A (en) 1992-10-05 1995-04-04 Ericsson Ge Mobile Communications, Inc. Method for transmitting broadcast information in a digital control channel
US5995539A (en) 1993-03-17 1999-11-30 Miller; William J. Method and apparatus for signal transmission and reception
US5444718A (en) 1993-11-30 1995-08-22 At&T Corp. Retransmission protocol for wireless communications
US5511233A (en) 1994-04-05 1996-04-23 Celsat America, Inc. System and method for mobile communications in coexistence with established communications systems
US6334219B1 (en) 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
JP3130752B2 (ja) 1995-02-24 2001-01-31 株式会社東芝 Ｏｆｄｍ伝送受信方式及び送受信装置
US5592548A (en) 1995-05-31 1997-01-07 Qualcomm Incorporated System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process
US6104926A (en) 1995-07-31 2000-08-15 Gte Airfone, Incorporated Call handoff
US5732351A (en) 1995-08-31 1998-03-24 Motorola, Inc. Communication system and method for single channel hand-offs
US5717689A (en) 1995-10-10 1998-02-10 Lucent Technologies Inc. Data link layer protocol for transport of ATM cells over a wireless link
US6108530A (en) 1995-12-14 2000-08-22 Lucent Technologies Inc. System and method for transmitting a displayable message between short message entities in more than one data package
US5793757A (en) 1996-02-13 1998-08-11 Telefonaktiebolaget L M Ericsson (Publ) Telecommunication network having time orthogonal wideband and narrowband sytems
US5822700A (en) 1996-04-18 1998-10-13 Telefonaktiebolaget L M Ericsson Flow control of short message service messages in a cellular telephone network
CA2206385C (en) 1996-05-28 2009-03-24 Shinichiro Ohmi Access control method in communication system
JPH1051354A (ja) 1996-05-30 1998-02-20 N T T Ido Tsushinmo Kk Ｄｓ−ｃｄｍａ伝送方法
JP3585871B2 (ja) 1996-05-30 2004-11-04 株式会社エヌ・ティ・ティ・ドコモ Ｄｓ−ｃｄｍａ伝送方法及び装置
JP3045076B2 (ja) 1996-07-17 2000-05-22 日本電気株式会社 非電話呼接続システム
DE19629899C1 (de) 1996-07-24 1997-08-21 Nokia Mobile Phones Ltd TDD-Verfahren zwischen einer Basisstation und wenigstens einer Mobilstation
CA2183140C (en) 1996-08-12 2001-11-20 Grant Mcgibney Ofdm timing and frequency recovery system
JP3407558B2 (ja) 1996-08-23 2003-05-19 ソニー株式会社 送信方法、送信装置、受信方法、受信装置、多元接続方法及び多元接続システム
US5790534A (en) 1996-09-20 1998-08-04 Nokia Mobile Phones Limited Load control method and apparatus for CDMA cellular system having circuit and packet switched terminals
US6233456B1 (en) 1996-09-27 2001-05-15 Qualcomm Inc. Method and apparatus for adjacent coverage area handoff in communication systems
US6259724B1 (en) 1996-10-18 2001-07-10 Telefonaktiebolaget L M Ericsson (Publ) Random access in a mobile telecommunications system
US6222828B1 (en) 1996-10-30 2001-04-24 Trw, Inc. Orthogonal code division multiple access waveform format for use in satellite based cellular telecommunications
DE19647833B4 (de) 1996-11-19 2005-07-07 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren zur gleichzeitigen Funkübertragung digitaler Daten zwischen mehreren Teilnehmerstationen und einer Basisstation
US6377587B1 (en) 1996-12-26 2002-04-23 Cypress Semiconductor Corp. Data packet format and handling for serial communications with embedded reverse channel responses
DE19701011C1 (de) 1997-01-14 1998-06-10 Siemens Ag Verfahren und Anordnung zur Kanalschätzung von Mobilfunkkanälen
CA2503248C (en) 1997-02-24 2012-02-07 At&T Wireless Services, Inc. Highly bandwidth-efficient communications
KR100212060B1 (ko) 1997-03-31 1999-08-02 윤종용 시분할다중접속방식 통신시스템에 사용하기 위한 프레임 구조방법
FI105136B (fi) 1997-04-21 2000-06-15 Nokia Mobile Phones Ltd Yleinen pakettiradiopalvelu
US6105064A (en) 1997-05-30 2000-08-15 Novell, Inc. System for placing packets on network for transmission from sending endnode to receiving endnode at times which are determined by window size and metering interval
US5867478A (en) 1997-06-20 1999-02-02 Motorola, Inc. Synchronous coherent orthogonal frequency division multiplexing system, method, software and device
US5991330A (en) 1997-06-27 1999-11-23 Telefonaktiebolaget L M Ericsson (Pub1) Mobile Station synchronization within a spread spectrum communication systems
US6021124A (en) 1997-08-19 2000-02-01 Telefonaktiebolaget Lm Ericsson Multi-channel automatic retransmission query (ARQ) method
US6377809B1 (en) 1997-09-16 2002-04-23 Qualcomm Incorporated Channel structure for communication systems
US6285665B1 (en) 1997-10-14 2001-09-04 Lucent Technologies Inc. Method for establishment of the power level for uplink data transmission in a multiple access system for communications networks
US6327254B1 (en) 1997-10-14 2001-12-04 Lucent Technologies Inc. Method for bandwidth sharing in a multiple access system for communications networks
SE519211C2 (sv) 1997-10-14 2003-01-28 Ericsson Telefon Ab L M Förfaranden för att initiera omkonfiguration av en cell avseende antalet signaleringskanaler i förhållande till antalet trafikkanaler
DE19747369A1 (de) 1997-10-27 1999-05-06 Siemens Ag Übertragungskanalschätzung in Telekommunikationssystemen mit drahtloser Telekommunikation
US6134434A (en) 1997-12-08 2000-10-17 Qualcomm Incorporated System and method for providing service negotiation in a communications network
US6603801B1 (en) 1998-01-16 2003-08-05 Intersil Americas Inc. Spread spectrum transceiver for use in wireless local area network and having multipath mitigation
US6563858B1 (en) 1998-01-16 2003-05-13 Intersil Americas Inc. Method of performing antenna diversity in spread spectrum in wireless local area network
US6618454B1 (en) 1998-02-06 2003-09-09 At&T Corp. Diversity coded OFDM for high data-rate communication
DE69838807T2 (de) 1998-02-18 2008-10-30 Sony Deutschland Gmbh Abbildung von Mehrträgersignalen in GSM-Zeitschlitzen
JP3981898B2 (ja) 1998-02-20 2007-09-26 ソニー株式会社 信号受信装置および方法、並びに記録媒体
EP0938208A1 (en) 1998-02-22 1999-08-25 Sony International (Europe) GmbH Multicarrier transmission, compatible with the existing GSM system
KR100655952B1 (ko) 1998-02-26 2006-12-08 소니 가부시끼 가이샤 통신시스템, 기지국장치, 통신단말장치 및 통신방법
US6333937B1 (en) 1998-03-05 2001-12-25 At&T Wireless Services, Inc. Access retry method for shared channel wireless communications links
US6643281B1 (en) 1998-03-05 2003-11-04 At&T Wireless Services, Inc. Synchronization preamble method for OFDM waveforms in a communications system
JPH11261449A (ja) * 1998-03-13 1999-09-24 Toyo Commun Equip Co Ltd 無線通信システム
JP3956479B2 (ja) 1998-04-27 2007-08-08 ソニー株式会社 移動通信システム、移動局及び基地局
JP3782237B2 (ja) 1998-06-18 2006-06-07 日本放送協会 Ｏｆｄｍ信号復調装置
US6594238B1 (en) 1998-06-19 2003-07-15 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for dynamically adapting a connection state in a mobile communications system
WO1999066748A1 (en) 1998-06-19 1999-12-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for dynamically adapting a connection state in a mobile communications system
US6505253B1 (en) 1998-06-30 2003-01-07 Sun Microsystems Multiple ACK windows providing congestion control in reliable multicast protocol
US6487235B2 (en) 1998-08-24 2002-11-26 At&T Wireless Services, Inc. Delay compensation
JP3123520B2 (ja) 1998-10-08 2001-01-15 日本電気株式会社 衛星間光通信用捕捉レーザビーム追尾誤差検出方法および装置
US6724813B1 (en) 1998-10-14 2004-04-20 Telefonaktiebolaget Lm Ericsson (Publ) Implicit resource allocation in a communication system
US6418494B1 (en) 1998-10-30 2002-07-09 Cybex Computer Products Corporation Split computer architecture to separate user and processor while retaining original user interface
JP2000151557A (ja) 1998-11-13 2000-05-30 Nec Corp Ｃｄｍａ通信装置
US6597680B1 (en) 1998-11-16 2003-07-22 Telefonaktiebolaget Lm Ericsson (Publ) Packet traffic channel reassignment
US6367045B1 (en) 1999-07-01 2002-04-02 Telefonaktiebolaget Lm Ericsson (Publ) Bandwidth efficient acknowledgment/negative acknowledgment in a communication system using automatic repeat request (ARQ)
US6473393B1 (en) 1998-12-18 2002-10-29 At&T Corp. Channel estimation for OFDM systems with transmitter diversity
US6654429B1 (en) 1998-12-31 2003-11-25 At&T Corp. Pilot-aided channel estimation for OFDM in wireless systems
JP2000201134A (ja) 1999-01-06 2000-07-18 Ntt Mobil Communication Network Inc マルチキャリア／ｄｓ―ｃｄｍａ伝送方法および復調装置
US6487252B1 (en) 1999-01-29 2002-11-26 Motorola, Inc. Wireless communication system and method for synchronization
JP2000252947A (ja) 1999-02-26 2000-09-14 Victor Co Of Japan Ltd Ｏｆｄｍ多チャンネル伝送送受信システム
FI106760B (fi) 1999-03-03 2001-03-30 Nokia Oyj Menetelmä ja laite tiedonsiirtopakettien uudelleenlähettämiseksi
CA2299639C (en) 1999-03-05 2005-11-01 Mitel Corporation Adaptive rule-based mechanism and method for feature interaction resolution
US6473418B1 (en) 1999-03-11 2002-10-29 Flarion Technologies, Inc. Orthogonal frequency division multiplexing based spread spectrum multiple access
CA2299568A1 (en) 1999-03-11 2000-09-11 Lucent Technologies Inc. Orthogonal frequency division multiplexing based spread spectrum multiple access system using directional antenna
JP2000278207A (ja) 1999-03-23 2000-10-06 Oki Electric Ind Co Ltd 送信電力制御方法及び無線通信装置
JP3667549B2 (ja) 1999-03-29 2005-07-06 日本電気株式会社 ダイバーシティ受信装置
US6597745B1 (en) 1999-04-06 2003-07-22 Eric M. Dowling Reduced complexity multicarrier precoder
US6661832B1 (en) 1999-05-11 2003-12-09 Qualcomm Incorporated System and method for providing an accurate estimation of received signal interference for use in wireless communications systems
US6515997B1 (en) 1999-05-17 2003-02-04 Ericsson Inc. Method and system for automatic configuration of a gateway translation function
US6430724B1 (en) 1999-05-28 2002-08-06 Agere Systems Guardian Corp. Soft selection combining based on successive erasures of frequency band components in a communication system
GB2350753B (en) 1999-06-04 2003-12-10 Fujitsu Ltd Measuring channel characteristics in mobile communications networks
KR100343773B1 (ko) 1999-06-28 2002-07-19 한국전자통신연구원 코드분할다중접속시스템의 부분 병렬 간섭잡음 제거장치 및 방법
JP2001036497A (ja) 1999-07-19 2001-02-09 Mitsubishi Electric Corp 通信装置および通信方法
US6594320B1 (en) 1999-08-25 2003-07-15 Lucent Technologies, Inc. Orthogonal Frequency Division Multiplexed (OFDM) carrier acquisition method
KR100532274B1 (ko) 1999-09-08 2005-11-29 삼성전자주식회사 디지털 휴대용 단말기의 장문 메시지 송수신장치 및 그 방법
JP3317286B2 (ja) 1999-09-21 2002-08-26 日本電気株式会社 復調方法及び復調回路
US6522886B1 (en) 1999-11-22 2003-02-18 Qwest Communications International Inc. Method and system for simultaneously sharing wireless communications among multiple wireless handsets
US6996195B2 (en) 1999-12-22 2006-02-07 Nokia Mobile Phones Ltd. Channel estimation in a communication system
US6674794B1 (en) 2000-02-04 2004-01-06 Motorola, Inc. System and method for sampling phase adjustment by an analog modem
US6477210B2 (en) 2000-02-07 2002-11-05 At&T Corp. System for near optimal joint channel estimation and data detection for COFDM systems
US6567397B1 (en) 2000-02-15 2003-05-20 Sophia Communications, Inc. System and method for wireless exchange of data in a non-real-time data communications system
DE10007602A1 (de) 2000-02-18 2001-08-30 Siemens Ag Verfahren zum Übertragen von Paketdateninformationen in einem Funk-Kommunikationssystem
US6801564B2 (en) 2000-02-23 2004-10-05 Ipr Licensing, Inc. Reverse link correlation filter in wireless communication systems
JP3414353B2 (ja) 2000-03-15 2003-06-09 日本電気株式会社 Ｃｄｍａ復調装置及びその方法
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
US20020154705A1 (en) 2000-03-22 2002-10-24 Walton Jay R. High efficiency high performance communications system employing multi-carrier modulation
EP1931077B1 (en) 2000-05-17 2015-08-05 Panasonic Intellectual Property Corporation of America Quality of Service control for a hybrid ARQ transmission apparatus with data and control channel for packet data transmission
US6990061B2 (en) 2000-05-31 2006-01-24 Interuniversitair Micro-Elektronica Centrum Method and apparatus for channel estimation
EP1168739B1 (fr) 2000-06-23 2005-10-19 STMicroelectronics N.V. Procédé et dispositif d'estimation de la réponse impulsionelle d'un canal de transmission d'informations, en particulier pour un téléphone mobile cellulaire
CA2313314A1 (en) 2000-06-30 2001-12-30 Frank Van Heeswyk Control channel for a wireless digital subscriber line system
GB2364206B (en) 2000-06-30 2004-12-15 Motorola Inc Transmission procedures
US6876645B1 (en) 2000-07-05 2005-04-05 Ericsson Inc. Delay and channel estimation for multi-carrier CDMA system
US7042869B1 (en) 2000-09-01 2006-05-09 Qualcomm, Inc. Method and apparatus for gated ACK/NAK channel in a communication system
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
FI20001975A (fi) 2000-09-07 2002-03-08 Nokia Corp Ohjaustietojen signalointimenetelmä
US6990098B1 (en) 2000-09-11 2006-01-24 Sun Microsystems, Inc. Reliable multicast using merged acknowledgements
FR2814012B1 (fr) 2000-09-14 2002-10-31 Mitsubishi Electric Inf Tech PROCEDE D'ATTRIBUTION D'UN NIVEAU DE PUISSANCE D'EMISSION A DES SYMBOLES PILOTES UTILISES POUR l'ESTIMATION DU CANAL D'UN SYSTEME DE TRANSMISSION
US7009960B2 (en) 2000-09-15 2006-03-07 Texas Instruments Incorporated Medium access control protocol for high rate wireless personal area network
JP2002111624A (ja) 2000-10-03 2002-04-12 Nippon Hoso Kyokai <Nhk> Ｏｆｄｍ信号受信装置
JP2002111631A (ja) 2000-10-04 2002-04-12 Yrp Mobile Telecommunications Key Tech Res Lab Co Ltd 無線通信システム及び無線通信装置
US6658619B1 (en) 2000-10-06 2003-12-02 Ericsson Inc. Systems and methods for implementing hierarchical acknowledgement bitmaps in an ARQ protocol
RU2233548C2 (ru) 2000-10-20 2004-07-27 Самсунг Электроникс Ко., Лтд. Устройство и способ определения скорости передачи пакетных данных в системе мобильной связи
KR100446537B1 (ko) 2000-10-21 2004-09-01 삼성전자주식회사 이동 통신시스템의 패킷 데이터 전송 방법 및 장치
US6804520B1 (en) 2000-11-01 2004-10-12 Telefonaktiebolaget Lm Ericsson (Publ) Temporary service interruption for high speed data transfer
US6369758B1 (en) 2000-11-01 2002-04-09 Unique Broadband Systems, Inc. Adaptive antenna array for mobile communication
US6807165B2 (en) 2000-11-08 2004-10-19 Meshnetworks, Inc. Time division protocol for an ad-hoc, peer-to-peer radio network having coordinating channel access to shared parallel data channels with separate reservation channel
JP3602785B2 (ja) 2000-11-09 2004-12-15 日本電信電話株式会社 マルチキャリア変調方式用復調回路
JP3661092B2 (ja) 2000-11-10 2005-06-15 株式会社ケンウッド 直交周波数分割多重信号受信装置及び直交周波数分割多重信号受信方法
KR20020036880A (ko) 2000-11-11 2002-05-17 구자홍 Ｓｍｓ를 이용한 장문의 문자 메시지 전송 방법
JP3776716B2 (ja) 2000-11-17 2006-05-17 株式会社東芝 直交周波数分割多重伝送信号受信装置
CN100440762C (zh) 2000-11-17 2008-12-03 松下电器产业株式会社 正交频分复用通信装置
US6977974B1 (en) 2000-11-20 2005-12-20 At&T Corp. De-modulation of MOK(M-ary orthogonal modulation)
GB2369268B (en) 2000-11-21 2003-01-22 Ericsson Telefon Ab L M Controlling channel switching in a UMTS network
CA2431849C (en) 2000-12-15 2013-07-30 Broadstrom Telecommunications, Inc. Multi-carrier communications with group-based subcarrier allocation
US6947748B2 (en) 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
AU2002235217A1 (en) 2000-12-15 2002-06-24 Broadstorm Telecommunications, Inc. Multi-carrier communications with adaptive cluster configuration and switching
US6878694B2 (en) 2000-12-20 2005-04-12 Alcon, Inc. Ophthalmic irrigating solution adapted for use in lasik surgery
KR100377197B1 (ko) 2000-12-26 2003-03-26 한국전자통신연구원 다중 캐리어 무선통신 수신 시스템의 캐리어 분리 장치 및그 방법
KR100754633B1 (ko) * 2000-12-27 2007-09-05 삼성전자주식회사 이동통신 시스템에서 패킷 데이터 서비스를 위한 송수신장치 및 방법
US6466591B1 (en) 2000-12-30 2002-10-15 Redback Networks Inc. Method and apparatus for processing of multiple protocols within data and control channels in data transmission signals
FR2821515B1 (fr) 2001-02-23 2003-05-23 Cit Alcatel Procede de gestion de ressources de traitement dans un systeme de radiocommunications mobiles
US6813478B2 (en) 2001-02-12 2004-11-02 Qualcomm Inc Method and apparatus for searching a gated pilot
US6633616B2 (en) 2001-02-21 2003-10-14 Magis Networks, Inc. OFDM pilot tone tracking for wireless LAN
US6549561B2 (en) 2001-02-21 2003-04-15 Magis Networks, Inc. OFDM pilot tone tracking for wireless LAN
US20020160781A1 (en) 2001-02-23 2002-10-31 Gunnar Bark System, method and apparatus for facilitating resource allocation in a communication system
US6447210B1 (en) 2001-02-26 2002-09-10 Oldenburg Cannon, Inc. Resin nozzle positioner
US7151740B2 (en) 2001-02-28 2006-12-19 Cingular Wireless Ii, Llc Transmit power control for an OFDM-based wireless communication system
US6940827B2 (en) 2001-03-09 2005-09-06 Adaptix, Inc. Communication system using OFDM for one direction and DSSS for another direction
US6888805B2 (en) 2001-03-23 2005-05-03 Qualcomm Incorporated Time multiplexed transmission scheme for a spread spectrum communication system
US8051212B2 (en) 2001-04-11 2011-11-01 Mellanox Technologies Ltd. Network interface adapter with shared data send resources
JP2002311921A (ja) 2001-04-19 2002-10-25 Hitachi Ltd 表示装置およびその駆動方法
JP4089171B2 (ja) * 2001-04-24 2008-05-28 株式会社日立製作所 計算機システム
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
US7310336B2 (en) 2001-05-18 2007-12-18 Esa Malkamaki Hybrid automatic repeat request (HARQ) scheme with in-sequence delivery of packets
EP1265411B1 (en) 2001-06-08 2007-04-18 Sony Deutschland GmbH Multicarrier system with adaptive bit-wise interleaving
US7027429B2 (en) 2001-06-19 2006-04-11 Flarion Technologies, Inc. Method and apparatus for time and frequency synchronization of OFDM communication 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
WO2003003601A1 (en) 2001-06-29 2003-01-09 Nokia Corporation Method and apparatus for an optical cdma system
JP2003060645A (ja) 2001-08-13 2003-02-28 Nippon Telegr & Teleph Corp <Ntt> 無線パケット通信伝送方法・無線パケット通信システム
JP2003060655A (ja) 2001-08-15 2003-02-28 Nippon Telegr & Teleph Corp <Ntt> 無線アクセス集中制御装置
MXPA04001544A (es) 2001-08-21 2004-05-17 Roke Manor Research Metodo de reconocimiento de datos.
DE60104113T2 (de) 2001-08-22 2004-10-28 Matsushita Electric Industrial Co., Ltd., Kadoma Übertragungsverfahren und Übertragungsgerät mit Mehrkanal-ARQ
US6697347B2 (en) 2001-08-22 2004-02-24 Nokia Mobile Phones Ltd. Method and apparatus for controlling transmission of packets in a wireless communication system
JP4171261B2 (ja) * 2001-08-27 2008-10-22 松下電器産業株式会社 無線通信装置及び無線通信方法
WO2003021829A1 (fr) 2001-08-30 2003-03-13 Fujitsu Limited Systeme et procede d'emission amrc a porteuses multiples
JP2003078565A (ja) 2001-08-30 2003-03-14 Matsushita Electric Ind Co Ltd 無線通信装置
US6665309B2 (en) 2001-09-20 2003-12-16 Nokia Corporation Apparatus, and associated method, for generating assignment information used pursuant to channel allocation in a radio communication system
US7139320B1 (en) 2001-10-11 2006-11-21 Texas Instruments Incorporated Method and apparatus for multicarrier channel estimation and synchronization using pilot sequences
US7248559B2 (en) 2001-10-17 2007-07-24 Nortel Networks Limited Scattered pilot pattern and channel estimation method for MIMO-OFDM systems
US20030081538A1 (en) 2001-10-18 2003-05-01 Walton Jay R. Multiple-access hybrid OFDM-CDMA system
US7054902B2 (en) 2001-10-23 2006-05-30 Packeteer, Inc. Multicast delivery systems and methods
US7092459B2 (en) 2001-11-08 2006-08-15 Qualcomm, Incorporated Frequency tracking using pilot and non-pilot symbols
CA2473863A1 (en) 2001-11-13 2003-05-22 Ems Technologies, Inc. Enhancements for tcp perfomance enhancing proxies
KR100811043B1 (ko) 2001-11-16 2008-03-06 엘지전자 주식회사 이동 통신 시스템에서 공유 채널 （ｓｃｈ） 및 ｈｉ에대한 송신 전력 제어 방법
US6907246B2 (en) 2001-11-20 2005-06-14 Navini Networks, Inc. Method and system for reducing wireless multi-cell interferences through segregated channel assignments and segregated antenna beams
US7058134B2 (en) 2001-12-17 2006-06-06 Intel Corporation System and method for multiple signal carrier time domain channel estimation
US7020110B2 (en) 2002-01-08 2006-03-28 Qualcomm Incorporated Resource allocation for MIMO-OFDM communication systems
US20030135640A1 (en) 2002-01-14 2003-07-17 Texas Instruments Incorporated Method and system for group transmission and acknowledgment
JP2003218826A (ja) 2002-01-23 2003-07-31 Rikogaku Shinkokai 直交周波数分割多重信号の受信方式及び受信機
US6636568B2 (en) 2002-03-01 2003-10-21 Qualcomm Data transmission with non-uniform distribution of data rates for a multiple-input multiple-output (MIMO) system
US7099299B2 (en) 2002-03-04 2006-08-29 Agency For Science, Technology And Research CDMA system with frequency domain equalization
US7630403B2 (en) 2002-03-08 2009-12-08 Texas Instruments Incorporated MAC aggregation frame with MSDU and fragment of MSDU
US7061916B2 (en) 2002-03-12 2006-06-13 Adtran Inc. Mechanism for utilizing voice path DMA in packetized voice communication system to decrease latency and processor overhead
JP3988934B2 (ja) 2002-03-14 2007-10-10 株式会社Ｋｄｄｉ研究所 無線チャネル割当方法および無線ノードを制御するプログラムの記憶媒体
US7398398B2 (en) 2002-03-16 2008-07-08 Trustedflow Systems, Inc. Authenticated and metered flow control method
JP4198428B2 (ja) 2002-04-05 2008-12-17 三菱電機株式会社 無線伝送装置
CN103596270B (zh) 2002-05-01 2017-04-19 美商内数位科技公司 无线通信中使用的用户设备以及网络装置
US8089879B2 (en) 2002-05-15 2012-01-03 Alcatel Lucent In-band flow control methods for communications systems
US7420921B2 (en) 2002-05-17 2008-09-02 Broadcom Corporation Aggregated fragment acknowledgement in local area network
KR100440969B1 (ko) 2002-05-23 2004-07-21 삼성전자주식회사 네트워킹 방법 및 그 장치
US6928065B2 (en) 2002-06-11 2005-08-09 Motorola, Inc. Methods of addressing and signaling a plurality of subscriber units in a single slot
US7933293B2 (en) 2002-06-12 2011-04-26 Xocyst Transfer Ag L.L.C. Link margin notification using return frame
US7551546B2 (en) 2002-06-27 2009-06-23 Nortel Networks Limited Dual-mode shared OFDM methods/transmitters, receivers and systems
EP1919152B1 (en) 2002-06-27 2012-10-03 Nortel Networks Limited Dual-mode shared OFDM methods/transmitters, receivers and systems
US6881883B2 (en) * 2002-07-25 2005-04-19 Winston Harrison Relative chord keyboard instructional method
TWI475829B (zh) 2002-08-07 2015-03-01 Intel Corp 支援多媒體廣播及多播服務之頻道切換
AU2003250416A1 (en) 2002-08-13 2004-02-25 Koninklijke Philips Electronics N.V. Joint channel and noise variance estimation in a wideband ofdm system
EP1389847B1 (en) 2002-08-13 2006-12-27 Matsushita Electric Industrial Co., Ltd. Hybrid automatic repeat request protocol
US20040062206A1 (en) 2002-09-30 2004-04-01 Soong Anthony C.K. System and method for fast reverse link scheduling in a wireless communication network
US7039004B2 (en) 2002-10-01 2006-05-02 Atheros Communications, Inc. Decision feedback channel estimation and pilot tracking for OFDM systems
WO2004036811A2 (en) 2002-10-15 2004-04-29 Tensorcomm Inc. Method and apparatus for interference suppression with efficient matrix inversion in a ds-cdma system
EP1414256B1 (en) 2002-10-24 2006-07-05 Lucent Technologies Inc. A method and system for transferring of a call connection connecting a base station and a mobile user terminal between dedicated and shared channels
US8320301B2 (en) 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US8170513B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US7039001B2 (en) 2002-10-29 2006-05-02 Qualcomm, Incorporated Channel estimation for OFDM communication systems
US7042857B2 (en) 2002-10-29 2006-05-09 Qualcom, Incorporated Uplink pilot and signaling transmission in wireless communication systems
US6928062B2 (en) 2002-10-29 2005-08-09 Qualcomm, Incorporated Uplink pilot and signaling transmission in wireless communication systems
JP2004159345A (ja) 2002-11-07 2004-06-03 Samsung Electronics Co Ltd 移動通信システムにおけるｏｆｄｍ周波数再使用方法
DE10252535A1 (de) 2002-11-08 2004-05-27 Philips Intellectual Property & Standards Gmbh Vorrichtung und ein Verfahren zur Übertragung von Datenpaketen verschiedener Verbindungen an einen Empfänger
US6885645B2 (en) 2002-11-19 2005-04-26 Motorola, Inc. Method and mobile station for controlling bearer assignment
JP3796212B2 (ja) 2002-11-20 2006-07-12 松下電器産業株式会社 基地局装置及び送信割り当て制御方法
KR100461537B1 (ko) 2002-11-27 2004-12-17 한국전자통신연구원 다중빔 위성 통신 시스템의 순방향 링크에서의 패킷 전송장치 및 그 방법
KR100542090B1 (ko) 2002-12-16 2006-01-11 한국전자통신연구원 무선 통신 시스템에서의 오류 제어 방법, 매체 접속 제어프레임 설계 방법 및 단말기 등록 방법과 기록 매체
US7508798B2 (en) 2002-12-16 2009-03-24 Nortel Networks Limited Virtual mimo communication system
US6909761B2 (en) 2002-12-19 2005-06-21 Motorola, Inc. Digital communication system having improved pilot encoding
EP1432261A1 (en) 2002-12-20 2004-06-23 Matsushita Electric Industrial Co., Ltd. Receiver specific data manipulation in a communication system
KR100606008B1 (ko) 2003-01-04 2006-07-26 삼성전자주식회사 부호 분할 다중 접속 통신 시스템에서 역방향 데이터재전송 요청 송수신 장치 및 방법
US7280467B2 (en) 2003-01-07 2007-10-09 Qualcomm Incorporated Pilot transmission schemes for wireless multi-carrier communication systems
US20040137943A1 (en) 2003-01-10 2004-07-15 Fuh-Shan Tseng FM receiving module for PDA/notebook
US6720613B1 (en) 2003-01-15 2004-04-13 Macronix International Co., Ltd. Method of fabricating multi-bit flash memory
AU2003218598A1 (en) 2003-02-14 2004-09-06 Huawei Technologies Co., Ltd. Interleaving method for ofdm communications
US7068703B2 (en) 2003-02-18 2006-06-27 Qualcomm, Incorporated Frequency hop sequences for multi-band communication systems
CA2516359C (en) 2003-02-19 2013-03-19 Flarion Technologies, Inc. Methods and apparatus of enhanced coding in multi-user communications systems
US7474686B2 (en) 2003-02-28 2009-01-06 Texas Instruments Incorporated Wireless personal area networks with rotation of frequency hopping sequences
US20050018750A1 (en) 2003-03-03 2005-01-27 Foerster Jeffrey R. Ultra-wideband transceiver architecture and associated methods
US7894468B2 (en) 2003-03-20 2011-02-22 Alcatel-Lucent Usa Inc. Transmission methods for communication systems supporting a multicast mode
US7046651B2 (en) 2003-04-04 2006-05-16 Nokia Corporation System topologies for optimum capacity transmission over wireless local area networks
JP3860556B2 (ja) 2003-04-04 2006-12-20 松下電器産業株式会社 基地局装置及び通信方法
JP4520705B2 (ja) 2003-04-11 2010-08-11 パナソニック株式会社 通信システム及び通信方法
US7464166B2 (en) 2003-04-11 2008-12-09 Telefonaktiebolaget Lm Ericsson (Publ) Contention-based forwarding with integrated multi-user detection capability
US20040213278A1 (en) 2003-04-24 2004-10-28 Broadcom Corporation System, method, and computer program product for in-place, lightweight Ack promotion in a cable modem environment
JP4666890B2 (ja) 2003-04-28 2011-04-06 ソニー株式会社 通信システム及び通信方法、並びに通信装置
US7181666B2 (en) 2003-04-29 2007-02-20 Qualcomm, Incorporated Method, apparatus, and system for user-multiplexing in multiple access systems with retransmission
US7254158B2 (en) 2003-05-12 2007-08-07 Qualcomm Incorporated Soft handoff with interference cancellation in a wireless frequency hopping communication system
JP2005006287A (ja) 2003-05-20 2005-01-06 Hitachi Ltd パイロット信号の送受信方法及び基地局装置及び端末装置
US7203461B2 (en) 2003-06-16 2007-04-10 Broadcom Corporation Adaptive channel quality estimation algorithm to support link adaptation
KR100689382B1 (ko) * 2003-06-20 2007-03-02 삼성전자주식회사 직교분할다중화방식을 기반으로 하는이동통신시스템에서의 송신장치 및 방법
KR100606105B1 (ko) * 2003-07-04 2006-07-28 삼성전자주식회사 다중 접속 방식을 사용하는 이동 통신 시스템의 셀 탐색장치 및 방법
US7552762B2 (en) * 2003-08-05 2009-06-30 Stream-Flo Industries Ltd. Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device
US7103823B2 (en) 2003-08-05 2006-09-05 Newisys, Inc. Communication between multi-processor clusters of multi-cluster computer systems
US8489949B2 (en) 2003-08-05 2013-07-16 Qualcomm Incorporated Combining grant, acknowledgement, and rate control commands
US7154933B2 (en) * 2003-09-25 2006-12-26 Avneesh Agrawal Interference management for soft handoff and broadcast services in a wireless frequency hopping communication system
US7145940B2 (en) * 2003-12-05 2006-12-05 Qualcomm Incorporated Pilot transmission schemes for a multi-antenna system
JP4363170B2 (ja) 2003-12-11 2009-11-11 日本電気株式会社 移動通信システムおよび移動無線端末
US7181170B2 (en) 2003-12-22 2007-02-20 Motorola Inc. Apparatus and method for adaptive broadcast transmission
US20050163194A1 (en) * 2004-01-28 2005-07-28 Qualcomm Incorporated Interference estimation in a wireless communication system
US8611283B2 (en) 2004-01-28 2013-12-17 Qualcomm Incorporated Method and apparatus of using a single channel to provide acknowledgement and assignment messages
US7551545B2 (en) 2004-02-09 2009-06-23 Qualcomm Incorporated Subband-based demodulation for an OFDM-based communication system
US8169889B2 (en) 2004-02-18 2012-05-01 Qualcomm Incorporated Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system
US7421041B2 (en) * 2004-03-01 2008-09-02 Qualcomm, Incorporated Iterative channel and interference estimation and decoding
US8085831B2 (en) * 2004-05-17 2011-12-27 Qualcomm Incorporated Interference control via selective blanking/attenuation of interfering transmissions
US8014781B2 (en) 2004-06-08 2011-09-06 Qualcomm Incorporated Intra-cell common reuse for a wireless communications system
US8068530B2 (en) 2004-06-18 2011-11-29 Qualcomm Incorporated Signal acquisition in a wireless communication system
US7724777B2 (en) 2004-06-18 2010-05-25 Qualcomm Incorporated Quasi-orthogonal multiplexing for a multi-carrier communication system
US10355825B2 (en) 2004-07-21 2019-07-16 Qualcomm Incorporated Shared signaling channel for a communication system
US8432803B2 (en) 2004-07-21 2013-04-30 Qualcomm Incorporated Method of providing a gap indication during a sticky assignment
US8477710B2 (en) 2004-07-21 2013-07-02 Qualcomm Incorporated Method of providing a gap indication during a sticky assignment
US7852746B2 (en) * 2004-08-25 2010-12-14 Qualcomm Incorporated Transmission of signaling in an OFDM-based system
US8533479B2 (en) 2004-11-22 2013-09-10 Liaison Technologies, Inc. Translating information between computing devices having different security management
US20060133308A1 (en) 2004-12-21 2006-06-22 Telefonatiebolaget L M Ericsson Active set management for packet data services in a mixed capability wireless communication network
US8238923B2 (en) 2004-12-22 2012-08-07 Qualcomm Incorporated Method of using shared resources in a communication system
US7453849B2 (en) 2004-12-22 2008-11-18 Qualcomm Incorporated Method of implicit deassignment of resources
US8831115B2 (en) 2004-12-22 2014-09-09 Qualcomm Incorporated MC-CDMA multiplexing in an orthogonal uplink
US8135088B2 (en) 2005-03-07 2012-03-13 Q1UALCOMM Incorporated Pilot transmission and channel estimation for a communication system utilizing frequency division multiplexing
US20060221810A1 (en) 2005-03-10 2006-10-05 Bojan Vrcelj Fine timing acquisition
US8571120B2 (en) 2006-09-22 2013-10-29 Texas Instruments Incorporated Transmission of acknowledge/not acknowledge (ACK/NACK) bits and their embedding in the reference signal
US8737517B2 (en) 2008-03-26 2014-05-27 Qualcomm Incorporated Scrambling and modulation to constrain the constellation size of ACK/NAK transmission on the data channel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040228267A1 (en) * 2003-05-12 2004-11-18 Avneesh Agrawal Fast frequency hopping with a code division multiplexed pilot in an OFDMA system

Also Published As

Publication number Publication date
JP2011259449A (ja) 2011-12-22
KR20070086928A (ko) 2007-08-27
AR052435A1 (es) 2007-03-21
US20110064039A1 (en) 2011-03-17
CN101112005B (zh) 2011-03-30
US20060133522A1 (en) 2006-06-22
MX2007007775A (es) 2007-08-21
JP5922178B2 (ja) 2016-05-24
TWI439060B (zh) 2014-05-21
TW201236392A (en) 2012-09-01
IL184001A0 (en) 2007-10-31
EP1847032B1 (en) 2018-03-21
CN101112005A (zh) 2008-01-23
TW200703947A (en) 2007-01-16
TW201236390A (en) 2012-09-01
WO2006069299A1 (en) 2006-06-29
US8817897B2 (en) 2014-08-26
RU2007128070A (ru) 2009-01-27
EP1847032A1 (en) 2007-10-24
TWI483559B (zh) 2015-05-01
BRPI0519540B1 (pt) 2019-01-22
EP2372923B1 (en) 2018-08-29
TWI451705B (zh) 2014-09-01
RU2384945C2 (ru) 2010-03-20
AU2005319083A1 (en) 2006-06-29
US8638870B2 (en) 2014-01-28
CA2591478C (en) 2012-01-10
US20120087336A1 (en) 2012-04-12
JP2008526121A (ja) 2008-07-17
US20110235685A1 (en) 2011-09-29
BRPI0519540A2 (pt) 2009-02-17
JP2012100311A (ja) 2012-05-24
EP2372923A3 (en) 2013-07-31
US8649451B2 (en) 2014-02-11
JP2011254490A (ja) 2011-12-15
US8831115B2 (en) 2014-09-09
JP2014180019A (ja) 2014-09-25
TW201236391A (en) 2012-09-01
AU2005319083B2 (en) 2009-12-17
CA2591478A1 (en) 2006-06-29
JP2014195271A (ja) 2014-10-09
EP2372923A2 (en) 2011-10-05

Similar Documents

Publication Publication Date Title
TWI387223B (zh) 在一正交上鏈中之多載波分碼多重接取（ｍｃ-ｃｄｍａ）多工處理
US9693339B2 (en) Code division multiplexing in a single-carrier frequency division multiple access system
US7852746B2 (en) Transmission of signaling in an OFDM-based system
RU2406264C2 (ru) Эффективная структура каналов для системы беспроводной связи
US20080049652A1 (en) Systems and methods for wireless communication over a wide bandwidth channel using a plurality of sub-channels
WO2006004313A1 (en) Apparatus and method for switching between an amc mode and a diversity mode in a broadbrand wireless communication system
JP2010504003A (ja) 干渉情報を測定、通信、および／または使用する方法および装置
JP2004363721A (ja) 無線通信システム及び無線通信方法