一种基于循环谱的MPSK 信号符号速率估计方法倡.pdf

第 28 卷第 6 .6
2011 年 6 月 Vol .2011No
Application Research puters Jun
一种基于循环谱的 MPSK 信号符号速率估计方法倡
谢然, 张效义, 田鹏武
(解放军信息工程大学信息工程学院, 郑州 450002)
摘要: 针对频谱感知的实际应用,在循环平稳理论的基础上,研究了经过脉冲成形滤波器滤波后的信
MPSK
号的循环谱特性,通过分析有限数据条件下剩余带宽对循环谱估计的影响,提出一种恒包络处理与频域平滑循
环周期图结合的符号速率估计算法。仿真表明该方法在有限数据条件下具有良好的性能,而且在剩余带宽较小
时,也能有效地估计信号的符号速率。
MPSK
关键词: 信号; 符号速率估计; 循环谱; 剩余带宽
MPSK
中图分类号: 393畅1 文献标志码: 文章编号: 1001唱3695(2011)06唱2294唱03
TP A
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doi j issn
Symbol rate estimation method of MPSK signals based on cyclic spectrum
, 唱, 唱
XIE Ran ZHANG Xiao yi TIAN Peng wu
( Institute of Information Engineering, PLA Information Engineering University, Zhengzhou 450002, China)
Abstract: ,
Aiming at the practical application of spectrum sensing this paper studied. the cyclic spectrum characteristics of唱
MPSK signals which filtered by pulse, shaping filter based on cyclic stationary theory By analyzing the affect of excess band
width to cyclic spectrum estimation provided. a symbol rate estimation algorithm bines constant amplitude processing
with spectrally smoothed, cyclic periodogram Simulation result shows, that the proposed algorithm can achieve good performance.
for limited data length and even when excess bandwidth is small the algorithm can estimate the symbol rate efficiently
Key words: ; ; ;
MPSK signals symbol rate estimatio