电子科技大学学报Issue(1)：44-47,80,5.DOI:10.3969/j.issn.1001-0548.2013.01.011
未知频偏下直扩信号的扩频序列估计
Spreading Sequence Estimation of Direct Sequence Spread Spectrum Signals with Unknown Carrier Offset
摘要
Abstract
In this paper, by absorbing the carrier frequency into the spreading waveform, an efficient algorithm to estimate the spreading sequence of direct sequence spread spectrum (DSSS) signals with unknown carrier offset is proposed. The proposed algorithm is based on the subspace decomposition of covariance matrix. The signal to noise ratio (SNR) of the spreading waveform estimation with unknown carrier offset is improved by signal subspace decomposition, which reduces the difficulty in carrier frequency estimation. Under the stochastic signal model assumption, we also derive the Cramer-Rao lower bound (CRB) of spreading waveform estimators. Simulation results demonstrate the effectiveness of proposed algorithm in lower SNR situations.关键词
克拉美劳界/直扩信号/扩频序列/子空间分解/未知频偏Key words
Cramer-Rao lower bound CRB/direct sequence spread spectrum signal/spreading sequence/subspace decomposition/unknown carrier offset分类
信息技术与安全科学引用本文复制引用
张花国,魏平..未知频偏下直扩信号的扩频序列估计[J].电子科技大学学报,2013,(1):44-47,80,5.基金项目
部级基金 （）
