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    • 4. 发明公开
    • Hybrid ARQ method with signal constellation rearrangement
    • BrückenverfahrenBrigenverfahren的签名者Signalkonstellation-Neuanordnung
    • EP2259477A2
    • 2010-12-08
    • EP10178347.0
    • 2001-02-21
    • Panasonic Corporation
    • Golitschek Edler von Elbwart, AlexanderWengerter, ChristianSchmitt, Michael PhilippSeidel, Eiko
    • H04L1/18H04L27/34
    • H04L1/1816H04L1/0003H04L1/1812H04L1/1819H04L27/34H04L27/3472
    • A hybrid ARQ retransmission method in a communication system, wherein data packets being encoded with a forward error correction (FEC) technique prior to transmission, are retransmitted based on an automatic repeat request and subsequently soft-combined with previously received erroneous data packets either on a symbol-by-symbol or a bit-by-bit basis. The symbols of said erroneous data packets are modulated by employing a predetermined first signal constellation. The symbols of the retransmitted data packets are modulated by employing at least a predetermined second signal constellation. Each symbol bit has a mean bit reliability defined by the individual bit reliabilities over all symbols of the predetermined signal constellation. According to the invention, the predetermined first and the at least second signal constellation are selected such that the combined mean bit reliabilities for the respective bits of all transmissions are averaged out.
    • 在通信系统中的混合ARQ重传方法,其中在传输之前用前向纠错(FEC)技术编码的数据分组基于自动重传请求被重传,并且随后在先前接收到的错误数据分组上进行软组合 逐符号或逐位的基础。 通过采用预定的第一信号星座来调制所述错误数据分组的符号。 通过采用至少预定的第二信号星座来调制重传的数据分组的符号。 每个符号位具有由预定信号星座的所有符号上的各个比特可靠性定义的平均比特可靠性。 根据本发明,选择预定的第一和至少第二信号星座,使得对于所有传输的各个比特的组合的平均比特可靠性被平均化。