| 基于判决反馈的TurboDPSK |
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| 引用本文： | 伍一,周世东,姚彦.基于判决反馈的TurboDPSK[J].电子学报,2002,30(4):512-514. |
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| 作者姓名： | 伍一 周世东 姚彦 |
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| 作者单位： | 清华大学电子工程系微波与数字通信国家重点实验室,北京 100084 |
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| 摘 要： | 本文针对衰落信道中DPSK(differential phase-shift keying)信号的特点,提出了一种基于判决反馈的Turbo DPSK解调/译码算法,它利用判决反馈进行衰落信道的估计并计算信息比特的似然比.与基于BCJR(Bahl-Cocke-Jelinek-Raviv)的Turbo DPSK解调/译码算法相比,它可以大大降低运算复杂度,减少迭代译码过程中所需的存储空间.仿真结果表明,采用这种新的迭代解调/译码算法可以获得和基于BCJR的迭代解调/译码算法几乎一样的性能.
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| 关 键 词： | 判决 译码技术 运算复杂度 Turbo DPSK |
| 文章编号： | 0372-2112(2002)04-0512-03 |
| 收稿时间： | 2000-10-16 |
Decision Aided Turbo DPSK |
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| WU Yi,ZHOU Shi dong,YAO Yan.Decision Aided Turbo DPSK[J].Acta Electronica Sinica,2002,30(4):512-514. |
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| Authors: | WU Yi ZHOU Shi dong YAO Yan |
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| Affiliation: | State Key Lab on Microwave and Digital Communications,Tsinghua University,Beijing 100084,China |
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| Abstract: | Based on the properties of DPSK (differential phase shift keying) signal in Rayleigh flat fading channels,we propose a novel decision aided algorithm for iterative DPSK signal demodulation/decoding.It utilizes decision feedback bits to estimate the channel coefficients and calculate the likelihood ratio of information bits.Compared with conventional iterative DPSK signal demodulation/decoding based on the BCJR (Bahl Cocke Jelinek Raviv) algorithm,the new algorithm results in considerably low decoding cost yet can achieve nearly the same performance. |
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| Keywords: | decision decoding algorithm decoding cost Turbo DPSK |
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