CP-CDMA系统中的时频差分编码与检测

doi:1000-436X(2007)07-0022-06

通信学报 ›› 2007, Vol. 28 ›› Issue (7): 22-27.doi: 1000-436X(2007)07-0022-06

CP-CDMA系统中的时频差分编码与检测

方朝曦,单杭冠,王宗欣

复旦大学通信科学与工程系，上海 200433

出版日期:2007-07-25 发布日期:2017-06-22
基金资助:
国家自然科学基金资助项目

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

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

Department of Communications Science and Engineering,Fudan University,Shanghai 200433,China

Online:2007-07-25 Published:2017-06-22
Supported by:
The National Natural Science Foundation of China

摘要/Abstract

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。

关键词: 码分多址, 循环前缀, 差分编码与检测, 频域均衡

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.

Key words: CDMA, cyclic prefix, differential encoding and detection, frequency domain equalization

方朝曦,单杭冠,王宗欣. CP-CDMA系统中的时频差分编码与检测[J]. 通信学报, 2007, 28(7): 22-27.

Zhao-xi FANG,Hang-guan SHAN,Zong-xin WANG. Time-frequency differential encoding and detection for cyclic prefix assisted CDMA system[J]. Journal on Communications, 2007, 28(7): 22-27.

图/表 5

参考文献 9

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CP-CDMA系统中的时频差分编码与检测

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

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