Decision Aided Turbo DPSK

WU Yi; ZHOU Shi-dong; YAO Yan

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Decision Aided Turbo DPSK

更新时间：2025-07-16

- Decision Aided Turbo DPSK
- Acta Electronica Sinica Vol. 30, Issue 4, Pages: 512-514(2002)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919
- Published：2002
- 稿件说明：
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WU Yi, ZHOU Shi-dong, YAO Yan. Decision Aided Turbo DPSK[J]. Acta Electronica Sinica, 2002, 30(4): 512-514.
DOI：

WU Yi, ZHOU Shi-dong, YAO Yan. Decision Aided Turbo DPSK[J]. Acta Electronica Sinica, 2002, 30(4): 512-514. DOI：

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.

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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