Single-Channel Blind Separation of Two QPSK Signals Using Per-Survivor Processing

被引：29
|
作者：
Tu Shilong [1 ]
Zheng Hui [1 ]
Gu Na [2 ]
机构：
[1] Natl Key Lab Blind Signals Proc, Chengdu 610041, Peoples R China
[2] Tsinghua Univ, Sch Elect Engn, Beijing 100000, Peoples R China
来源：
2008 IEEE ASIA PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS (APCCAS 2008), VOLS 1-4 | 2008年
关键词：
D O I：
10.1109/APCCAS.2008.4746063
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, we consider a blind separation problem for single-channel mixtures of two QPSK signals, which may be slightly different in carrier frequencies. We present the joint estimation of channel impulse responses (CIA) and data symbols for both sources. The proposed approach uses a per-survivor processing (PSP) algorithm which is efficiently implemented by combining the simple least mean square (LMS) algorithm and decision feedback sequence estimation (DFSE). We initialize the CUR resorting to amplitude and phase estimation to ensure and accelerate convergence. We also discuss the problem of timing. Simulation results are provided to illustrate the effectiveness of the proposed algorithm.
引用
收藏
页码：473 / +
页数：2
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