| 摘要: |
| 针对单天线接收的频谱混叠的混合信号盲恢复问题，在频移滤波器结
构上，提出了一种基于相关函数误差准则的自适应频移滤波信号盲恢复算法。该算法利用滤
波
器输出信号和参考信号以及混合信号与参考信号之间的相关函数误差来调整自适应滤波器输
出权值。分析了该算法的稳态性能。仿真结果表明：在信噪比大于-5 dB的条
件下，
该算法对混合信号分量的恢复相似度达80%以上，并且该算法仅需已知混合信号分量的循环
频率，无需其它先验信息，具有计算量小、敛速度快的优点。 |
| 关键词: 单天线混合信号 频移滤波器 盲恢复 相关函数 自适应算法 |
| DOI： |
|
| 基金项目:泰山学者建设专项基金 |
|
| A signal blind recovery algorithm for mixture signals based on FRESH filter |
| XU Bin,RUI Guo-sheng,CHEN Bi-ran |
| () |
| Abstract: |
| This paper studies the blind signal recovery problem for frequencyoverlapped
mixture signals received by single antenna.A signal blind recovery algorithm is
proposed based on FRESH(Frequency-shift) filter structure by using correlation f
unction error betwee
n estimation signal and reference signal, reference signal and mixing signal as
a criterion to update the weights of adaptive filters and its stable property i
s also discussed. 〖JP2〗Simulation results show that the recovery similarity of
mixture components is higher than 80% when SNR(Signal-to-Noise Ratio) is greate
r than -5 dB. Not any prior info
rmation but only cyclic frequencies of mixture components are needed for the alg
orithm,so it is featured by fast convergence speed and less computing complexity
. |
| Key words: single antenna mixture FRESH filter blind recovery correlation function adap
tive algorithm |
《电讯技术》编辑部 