JP4482046B2 - 送信装置および受信装置 - Google Patents
送信装置および受信装置 Download PDFInfo
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- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
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- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1845—Combining techniques, e.g. code combining
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- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1893—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
- H04L27/3416—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
-
- 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
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03312—Arrangements specific to the provision of output signals
- H04L25/03318—Provision of soft decisions
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Error Detection And Correction (AREA)
- Communication Control (AREA)
- Transmitters (AREA)
- Mobile Radio Communication Systems (AREA)
- Bidirectional Digital Transmission (AREA)
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- Detection And Correction Of Errors (AREA)
Description
・ソフト合成(Soft-Combining)
・符号合成(Code-Combining)
・ソフト合成と符号合成の組み合わせ
がある。
ソフト合成を使用すると、再送パケットは、以前受信した情報と同一の情報を運ぶ。この場合、例えば、非特許文献3または非特許文献4に開示されているように、複数の受信パケットをシンボル単位(symbol-by-symbol basis)またはビット単位(bit-by-bit basis)のどちらかで合成する。
符号合成は、受信パケットを連結して新しい符号語(送信回数が増加するほど符号化率が減少する)を生成する。したがって、復号器は、正しい復号化(符号化率は再送に依存)を実行するために、各再送時に送信の合成方法を知る必要がある。再送パケットの長さは回線状態に応じて変更可能であるため、符号合成はソフト合成に比べて柔軟性が高い。しかし、符号合成はソフト合成に比べてより多くの送信信号データを必要とする。
再送パケットに以前送信したシンボル/ビットと同一のシンボル/ビットおよび以前送信したシンボル/ビットと異なる符号シンボル/ビットが含まれている場合、同一の符号シンボル/ビットは「ソフト合成」の項で述べたソフト合成を用いて合成され、残りの符号シンボル/ビットは符号合成を用いて合成される。ここでの信号要件は符号合成の信号要件と類似している。
S. Kallel, "Analysis of a type II hybrid ARQ scheme with code combining(符号合成によるタイプIIハイブリッドARQ方式の分析)", IEEE Transactions on Communications, Vol.38, No.8, August 1990 S. Kallel, R. Link, S. Bakhtiyari, "Throughput performance of Memory ARQ schemes(メモリARQ方式の処理能力性能)", IEEE Transactions on Vehicular Technology, Vol.48, No.3, May 1999 D. Chase, "Code combining: A maximum-likelihood decoding approach for combining an arbitrary number of noisy packets(符号合成:任意の数のノイズを含むパケットを合成するための最尤復号方法)", IEEE Trans. Commun., Vol. COM-33, pp. 385-393, May 1985 B. A. Harvey, S. Wicker, "Packet Combining Systems based on the Viterbi Decoder(ビタビ復号器に基づくパケット合成システム)", IEEE Transactions on Communications, Vol.42, No. 2/3/4, April 1994 C. Berrou, A. Glavieux, P. Thitimajshima, "Near Shannon Limit Error-Correcting Coding and Decoding: Turbo-codes(近シャノン限界誤り訂正符号化および復号化:ターボ符号)", Proc. ICC '93, Geneva, Switzerland, pp. 1064-1070, May 1993 S. Le Goff, A. Glavieux, C. Berrou, "Turbo-Codes and High Spectral Efficiency Modulation(ターボ符号および高性能スペクトル変調)", IEEE SUPERCOMM/ICC '94, Vol. 2, pp. 645-649, 1994 A. Burr, "Modulation and Coding for Wireless Communications(無線通信のための変調および符号化)", Person Education, Prentice Hall, ISBN 0-201-39857-5, 2001 M. P. Schmitt, "Hybrid ARQ Scheme employing TCM and Packet Combining(TCMおよびパケット合成を用いたハイブリッドARQ方式)", Electronics Letters, Vol. 34, No. 18, September 1998
本発明の受信装置は、HARQプロセスを用いて再送されたデータを受信する受信装置であって、冗長度バージョンとコンスタレーションバージョンの複数の組み合わせを示すテーブルと、前記テーブルの前記冗長度バージョンと前記コンスタレーションバージョンの複数の組み合わせの1つを用いて再送データを受信する受信部と、を有する、構成を採る。
付加的白色ガウス雑音(AWGN:Additive White Gaussian Noise)および等しい尤度のシンボルを用いたチャネルによる送信でシンボルsnを送信したという制約の下でi番目のビットbn iの平均LLRは、
複数送信を考えると、独立したAWGNチャネルおよび等しい尤度のシンボルでシンボルsn (j)を送信したという制約の下でj番目のビットbn jの第k送信後の平均LLRは、
最初のTXに対してRV1&I1 1/M1 1の組み合わせを選択したと仮定する。ただし、(単一送信を考慮して性能が等しいか類似していると仮定して)最初の送信には他のどの組み合わせも選択可能である。
2回目のTXでは、残りの冗長度バージョン(この場合RV2)を送信する必要があり、最初のTX(この場合すべてのシステマティックビット)で送信済みのすべてのビットに対する信頼性を平均化する、つまり、信頼性の低いシステマティックビットの信頼性を高くする必要がある。これはRV2&I2 2/M2 2を送信することによって達成される。
3回目のTXの場合、どの冗長度バージョンを送信するかは自由であるが、この冗長度バージョンに対してまだ選択されていないマッパ/配置変換器、つまり、手順1のRV1&I2 1/M2 1および手順2のRV2&I1 2/M1 2と組み合わせる必要がある。これによって現在のビット・セットで送信されるパリティビットの平均化が確実に実行される。
4回目のTXの場合、残された組み合わせを選択する必要がある。これによって残りのパリティビット・セットの平均化が保証され、これまでに一度送信されたパリティビット・セットの送信が確実となる。
4回目のTXの後、平均化プロセスは終了する。したがって、冗長度バージョンとマッパ/配置変換器の組み合わせは自由に選択できる。以降のTXの場合、TX1からTX4に適用される規則を考慮する必要がある。
110 配置変換器
120、320 論理反転器
130 マッパ/変調器
200 チャネル
300 受信機
310 配置逆変換器
330 デマッパ/復調器
Claims (6)
- HARQプロセスを用いてデータを再送する送信装置であって、
冗長度バージョンとコンスタレーションバージョンの組み合わせを示すテーブルと、
前記テーブルの前記冗長度バージョンと前記コンスタレーションバージョンの複数の組み合わせの1つに基づいて、送信データのビットシーケンスのビット配置を変換し、且つ前記ビットシーケンスの論理値を反転してデータを再送する送信部と、
を有する送信装置。 - 前記送信部は、第1送信時と再送時とで異なる組み合わせを用いて前記データを送信し、
前記第1送信時に用いられる前記コンスタレーションバージョンは、ビットシーケンス(i 1 q 1 i 2 q 2 )を示し、
前記再送時に用いられる前記コンスタレーションバージョンは、前記ビットシーケンス(i 1 q 1 i 2 q 2 )に対して、i 1 およびq 1 の位置を交換し、i 2 およびq 2 の位置を交換し、i 1 とq 1 の論理値を反転したビットシーケンスを示す、
請求項1記載の送信装置。 - 前記送信部は、第1送信時と再送時とで異なる組み合わせを用いて前記データを送信し、
前記第1送信時に用いられる前記コンスタレーションバージョンは、ビットシーケンス(i 1 q 1 i 2 q 2 )を示し、
前記再送時に用いられる前記コンスタレーションバージョンは、前記ビットシーケンス(i 1 q 1 i 2 q 2 )に対して、i 1 およびq 1 の位置を交換し、i 2 およびq 2 の位置を交換し、i 2 とq 2 の論理値を反転したビットシーケンスを示す、
請求項1記載の送信装置。 - HARQプロセスを用いて再送されたデータを受信する受信装置であって、
冗長度バージョンとコンスタレーションバージョンの複数の組み合わせを示すテーブルと、
前記テーブルの前記冗長度バージョンと前記コンスタレーションバージョンの複数の組み合わせの1つに基づいて、受信した再送データのビットシーケンスのビット配置を変換し、且つ前記ビットシーケンスの論理値を反転するビットシーケンス変更部と、
を有する受信装置。 - 前記受信部は、第1送信時と再送時とで異なる組み合わせを用いて送信されたデータを受信し、
前記第1送信時に用いられる前記コンスタレーションバージョンは、ビットシーケンス(i 1 q 1 i 2 q 2 )を示し、
前記再送時に用いられる前記コンスタレーションバージョンは、前記ビットシーケンス(i 1 q 1 i 2 q 2 )に対して、i 1 およびq 1 の位置を交換し、i 2 およびq 2 の位置を交換し、i 1 とq 1 の論理値を反転したビットシーケンスを示す、
請求項4記載の受信装置。 - 前記受信部は、第1送信時と再送時とで異なる組み合わせを用いて送信されたデータを受信し、
前記第1送信時に用いられる前記コンスタレーションバージョンは、ビットシーケンス(i 1 q 1 i 2 q 2 )を示し、
前記再送時に用いられる前記コンスタレーションバージョンは、前記ビットシーケンス(i 1 q 1 i 2 q 2 )に対して、i 1 およびq 1 の位置を交換し、i 2 およびq 2 の位置を交換し、i 2 とq 2 の論理値を反転したビットシーケンスを示す、
請求項4記載の受信装置。
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EP01127244A EP1313247B1 (en) | 2001-11-16 | 2001-11-16 | Incremental redundancy ARQ retransmission method using bit reordering schemes |
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JP2009200552A Division JP4485595B2 (ja) | 2001-11-16 | 2009-08-31 | データ送信装置およびデータ受信装置 |
JP2009200553A Division JP4485596B2 (ja) | 2001-11-16 | 2009-08-31 | データ送信装置およびデータ受信装置 |
JP2009200554A Division JP4485597B2 (ja) | 2001-11-16 | 2009-08-31 | データ送信装置およびデータ受信装置 |
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JP2005309138A Expired - Lifetime JP4149475B2 (ja) | 2001-11-16 | 2005-10-24 | データ送信装置およびデータ受信装置 |
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JP2009200553A Expired - Lifetime JP4485596B2 (ja) | 2001-11-16 | 2009-08-31 | データ送信装置およびデータ受信装置 |
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JP (7) | JP3482643B2 (ja) |
KR (1) | KR100944589B1 (ja) |
CN (3) | CN1309203C (ja) |
AT (3) | ATE309652T1 (ja) |
DE (3) | DE60114849T2 (ja) |
EA (1) | EA006007B1 (ja) |
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EP1313247B1 (en) * | 2001-11-16 | 2005-11-09 | Matsushita Electric Industrial Co., Ltd. | Incremental redundancy ARQ retransmission method using bit reordering schemes |
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