Time-frequency differential encoding and detection for cyclic prefix assisted CDMA system

FANG Zhao-xi; SHAN Hang-guan; WANG Zong-xin

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Time-frequency differential encoding and detection for cyclic prefix assisted CDMA system

更新时间：2024-10-14

- Time-frequency differential encoding and detection for cyclic prefix assisted CDMA system
- Issue 7, Pages: 22-27(2007)
- 作者机构：
  
  1. 复旦大学通信科学与工程系
  2. 复旦大学通信科学与工程系,上海,200433
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.533
- Published：2007
- 稿件说明：
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FANG Zhao-xi, SHAN Hang-guan, WANG Zong-xin. Time-frequency differential encoding and detection for cyclic prefix assisted CDMA system[J]. 2007, (7): 22-27.
DOI：

FANG Zhao-xi, SHAN Hang-guan, WANG Zong-xin. Time-frequency differential encoding and detection for cyclic prefix assisted CDMA system[J]. 2007, (7): 22-27. DOI：

摘要

提出了一种新的用于基于循环前缀的直接序列扩频码分多址(CP-CDMA)系统的差分编码与检测方法。该方法利用信道在时域与频域上的相关性进行时频两维差分编码

在接收端采用基于最小均方误差准则的非相干检测。计算机仿真结果显示

该方法与现有差分编码方法相比

在快速时变多径信道中具有更优的比特误码率性能和更稳健的抗多普勒频移特性。

Abstract

A new differential encoding and detection scheme for cyclic prefix assisted CDMA system was proposed.Considering the correlation between channel impulse response in both time domain and frequency domain

a time-frequency differential encoding scheme and corresponding noncoherent detection and equalization based on MMSE criterion were presented.Computer simulation results show that it outperforms conventional method in fast fading multipath channel significantly

and shows high robustness against Doppler spread.

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