摘要： 分析单载波频域均衡(SC-FDE)信号循环自相关截面的性质，研究循环自相关与有用信号长度和循环前缀长度的关系，提出一种在没有先验信息的情况下，对其有用信号长度和循环前缀长度进行盲估计的算法。根据循环截面关于零点对称的性质以及循环前缀长度与截面谱线的关系限制谱峰搜索的区域，从而估计循环前缀长度和循环前缀符号个数。仿真结果表明，该算法可提高估计精度，在低信噪比时也能有较好的估计性能。
关键词:
单载波频域均衡信号,
循环自相关,
循环前缀,
参数估计,
正交频分复用,
块传输
Abstract: This paper deeply analyzes the cyclic autocorrelation property of Single Carrier-Frequency Domain Equalization(SC-FDE) signals and discusses the relationship between the cyclic autocorrelation function and the length of the useful signals and cyclic prefix. With no prior information, an algorithm for parameters estimation of SC-FDE signals is proposed. According to the property that the cross section is symmetrical about zero and the relationship between the length of cyclic prefix and the spectral line, this paper restricts the search of spectral peak to a specified region and estimates the length and the symbol number of the cyclic prefix. Simulation result proves that the algorithm improves the estimation accuracy, and has a better estimation performance even in the low noise signal ratio.
Key words:
Single Carrier-Frequency Domain Equalization(SC-FDE) signal,
cyclic autocorrelation,
cyclic prefix,
parameter estimation,
Orthogonal Frequency Division Multiplexing(OFDM),
block transmission
中图分类号:
邓思玉, 吴瑛, 张弛. 基于SC-FDE循环自相关的盲参数估计算法[J]. 计算机工程, 2013, 39(8): 135-138.
DENG Sai-Yu, TUN Ying, ZHANG Chi. Blind Parameters Estimation Algorithm Based on SC-FDE Cyclic Autocorrelation[J]. Computer Engineering, 2013, 39(8): 135-138.