JPWO2009087741A1 - 無線通信端末装置及び無線送信方法 - Google Patents
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- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- 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
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0003—Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0055—ZCZ [zero correlation zone]
- H04J13/0059—CAZAC [constant-amplitude and zero auto-correlation]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0074—Code shifting or hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
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- 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
- H04L25/0204—Channel estimation of multiple channels
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- 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
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
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- 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
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
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- 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
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- 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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0055—ZCZ [zero correlation zone]
-
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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Abstract
Description
R1-074010, Motorola, "Uplink Transmission of CQI and ACK/NACK", 3GPP TSG RAN1#50-bis, Shanghai, China, October 8-12, 2007 R1-074097, Samsung, "Multiplexing CQI and ACK/NAK Transmission in E-UTRA UL", 3GPP TSG RAN WG1 #50bis, Shanghai, China, October 8-12, 2007 R1-074141, Texas Instruments, "Simultaneous CQI and ACK/NAK Transmission in Uplink", 3GPP TSG RAN WG1 #50b, Shanghai, China, October 8-12, 2007
本発明の実施の形態1に係る端末装置100の構成について、図8を用いて説明する。図8において、制御情報生成部101は、下りSIR(Signal to Interference Ratio)などに基づいて、CQI信号を生成して符号化部102に出力する。符号化部102は、制御情報生成部101から出力された制御情報を符号化して変調部103に出力する。変調部103は、符号化部102から出力された制御情報を変調して拡散部105に出力する。
本発明の実施の形態2に係る端末装置300の構成について、図12を用いて説明する。なお、図12が図8と異なる点は、無線受信部301、復調部302及び復号化部303を追加し、複素係数乗算部113を複素係数乗算部304に変更した点である。
本発明の実施の形態3に係る端末装置500の構成について、図15を用いて説明する。なお、図15が図8と異なる点は、複素係数乗算部113を複素係数乗算部501に変更した点である。
Fourier Transform)したものを第2及び第6SC−FDMAシンボルに配置する。
R1-074010, Motorola, "Uplink Transmission of CQI and ACK/NACK", 3GPP TSG RAN1#50-bis, Shanghai, China, October 8-12, 2007 R1-074097, Samsung, "Multiplexing CQI and ACK/NAK Transmission in E-UTRA UL", 3GPP TSG RAN WG1 #50bis, Shanghai, China, October 8-12, 2007 R1-074141, Texas Instruments, "Simultaneous CQI and ACK/NAK Transmission in Uplink", 3GPP TSG RAN WG1 #50b, Shanghai, China, October 8-12, 2007
れると、隣接する循環シフトに割り当てられたCQI信号から干渉を受ける場合がある。このように循環シフト系列間干渉が生じると、CQI信号及び参照信号に悪影響を与え、チャネル推定精度及びCQI復調性能が劣化する。
本発明の実施の形態1に係る端末装置100の構成について、図8を用いて説明する。図8において、制御情報生成部101は、下りSIR(Signal to Interference Ratio)などに基づいて、CQI信号を生成して符号化部102に出力する。符号化部102は、制御情報生成部101から出力された制御情報を符号化して変調部103に出力する。変
調部103は、符号化部102から出力された制御情報を変調して拡散部105に出力する。
を生成して相関処理部212に出力し、相関処理部212は、デマッピング部210から出力されたZAC系列と、ZAC系列生成部211から出力されたZAC系列とを用いて相関演算を行い、演算結果をIDFT部213に出力する。IDFT部213は、相関処理部212から出力された信号にIDFT(Inverse Discrete Fourier Transform)処理を施し、周波数領域から時間領域の信号に変換し、マスク処理部214に出力する。マスク処理部214は、端末装置100が割り当てた循環シフト量を用いて、所望波の信号が存在する範囲のみを抽出し、DFT部215に出力する。DFT部215は、マスク処理部214から出力された相関値にDFT処理を施し、DFT処理を施した相関値を周波数領域等化部218に出力する。なお、DFT部215から出力された信号は、伝搬路の周波数変動を表すものであり、チャネル推定を同相加算により算出したため、各CQIシンボル(第1、3、4、5、7SC−FDMAシンボル)で同じチャネル推定値を持つ。
参照信号間の位相関係を変えることにより、隣接する循環シフトに配置される参照信号からの干渉を低減することができ、CQI及び参照信号の受信性能を向上させることができる。
本発明の実施の形態2に係る端末装置300の構成について、図12を用いて説明する。なお、図12が図8と異なる点は、無線受信部301、復調部302及び復号化部303を追加し、複素係数乗算部113を複素係数乗算部304に変更した点である。
+1})となる。
本発明の実施の形態3に係る端末装置500の構成について、図15を用いて説明する。なお、図15が図8と異なる点は、複素係数乗算部113を複素係数乗算部501に変更した点である。
ば、{w1, w2}={+1, +1}, {+1, -1}など)を複素係数乗算部206で乗算され、マスク処理部214から出力された参照信号の電力を測定し、測定した電力がある閾値を超えているか否かを判定する。測定した電力が閾値を超えていない場合は、再び、複素係数乗算部206に戻り、異なる位相パターンを乗算して、応答信号検出部601で電力が閾値を超えているか否かを判定する。測定した電力が閾値を超えている場合は、乗算した位相のパターンによりACKかNACKかを判定する。想定されるどのパターンでも閾値を超えない場合はDTX判定となる。
Claims (7)
- スロット内に含まれる複数の参照信号間の位相差を自装置に割り当てられた循環シフトインデックスに応じて制御し、参照信号を生成する参照信号生成手段と、
生成された参照信号を送信する送信手段と、
を具備する無線通信端末装置。 - 前記参照信号生成手段は、自装置に割り当てられた循環シフトインデックスが偶数である場合には、スロット内に含まれる複数の参照信号間の位相差を0度に制御し、自装置に割り当てられた循環シフトインデックスが奇数である場合には、スロット内に含まれる複数の参照信号間の位相差を180度に制御する請求項1に記載の無線通信端末装置。
- 前記参照信号生成手段は、自装置に割り当てられた循環シフトインデックスが奇数である場合には、スロット内に含まれる複数の参照信号間の位相差を0度に制御し、自装置に割り当てられた循環シフトインデックスが偶数である場合には、スロット内に含まれる複数の参照信号間の位相差を180度に制御する請求項1に記載の無線通信端末装置。
- 前記参照信号生成手段は、循環シフトがN個おきに使用される場合、N個おきにスロット内の参照信号間の位相差を180度ずつずらして、参照信号を生成する請求項1に記載の無線通信端末装置。
- 前記参照信号生成手段は、CQIと同一サブフレームで広帯域SRSを送信するユーザが存在する場合、該ユーザに割り当てられた循環シフトの前後M個の循環シフトインデックスについては、スロット内に含まれる参照信号間の位相差を同一とする請求項1に記載の無線通信端末装置。
- 前記参照信号生成手段は、CQIとACK/NACKとを同時送信する場合、NACKパターンとして、CQIのみを送信する際の参照信号に乗算する複素係数を用いる請求項1に記載の無線通信端末装置。
- スロット内に含まれる複数の参照信号間の位相差を自装置に割り当てられた循環シフトインデックスに応じて制御し、参照信号を生成する参照信号生成ステップと、
生成された参照信号を送信する送信ステップと、
を具備する無線送信方法。
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