利用Gibbs采样的同频混合信号单通道盲分离

doi:10.11959/j.issn.1000-436x.2015090

通信学报 ›› 2015, Vol. 36 ›› Issue (4): 157-162.doi: 10.11959/j.issn.1000-436x.2015090

利用Gibbs采样的同频混合信号单通道盲分离

杨勇¹,张冬玲¹,彭华¹,涂世龙²

¹ 解放军信息工程大学信息系统工程学院，河南郑州 450002
² 盲信号处理国家重点实验室，四川成都 610041

出版日期:2015-04-25 发布日期:2015-04-15
基金资助:
国家自然科学基金资助项目;国防基金资助项目

Single-channel blind separation of co-frequency modulated signals based on Gibbs sampler

Yong YANG¹,Dong-ling ZHANG¹,Hua PENG¹,Shi-long TU²

¹ Institute of Information System Engineering，PLA Information Engineering University，Zhengzhou 450002，China
² National Key Laboratory on Blind Signals Processing，Chengdu 610041，China

Online:2015-04-25 Published:2015-04-15
Supported by:
The National Natural Science Foundation of China;The National Defense Foundation of China

摘要/Abstract

摘要：

针对非合作接收的单通道同频数字调制混合信号，提出一种基于Gibbs采样的分离算法。该算法利用统计的方法获得未知符号序列概率密度的随机样本，运算复杂度随信道阶数的增加不呈指数增长。重点研究了基于单符号对、多符号对的分离算法和信道响应的跟踪，并对Gibbs分离算法和PSP分离算法的性能进行了详细的分析比较。仿真结果表明，针对2路QPSK调制的混合信号，在与L=4时的PSP算法具有近似分离性能的同时， Gibbs分离算法可使复杂度降低近17倍。

关键词: 单通道盲分离, Gibbs采样法, PSP算法, 成对载波多址

Abstract:

A Gibbs-sampler-based separation algorithm was proposed for single-channel co-frequency digital-modulated signals，which were received in non-cooperative ways.The probability density samples of unknown symbol sequences can be obtained by statistic method，and the computation complexity was not growing exponentially with the increase of channel order.With special emphasis on the separation algorithms of single pair of symbols，multiple pair of symbols and the tracking of channel responses.Moreover，the separation performance between Gibbs sampler and per-survivor processing(PSP) algorithm were analyzed and compared in detail.Simulation results show that，compared with PSP algorithm with L=4 for two co-frequency QPSK-modulated signals，Gibbs sampler can be nearly 17 times lower in computation complexity when the approximately performance is obtained.

Key words: single-channel blind separation, Gibbs sampler, PSP algorithm, paired carrier multiple access

杨勇,张冬玲,彭华,涂世龙. 利用Gibbs采样的同频混合信号单通道盲分离[J]. 通信学报, 2015, 36(4): 157-162.

Yong YANG,Dong-ling ZHANG,Hua PENG,Shi-long TU. Single-channel blind separation of co-frequency modulated signals based on Gibbs sampler[J]. Journal on Communications, 2015, 36(4): 157-162.

图/表 4

参考文献 15

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分离算法	条件		实数加法次数			实数乘法次数
分离算法	条件	BPSK	QPSK	8PSK	BPSK	QPSK	8PSK
Gibbs	G=1	9 420	16 620	45 420	10 080	18 720	53 280
(L=9, N_g=60)	G=2	13 530	143 130	2 216 730	14 610	158 610	2 462 610
	L=3	2 240	115 712	6 963 200	2 272	116 224	6 971 392
PSP
	L=4	11 776	2 424 832	583 008 256	11 904	2 433 024	583 532 544

利用Gibbs采样的同频混合信号单通道盲分离

Single-channel blind separation of co-frequency modulated signals based on Gibbs sampler

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