Spread Spectrum Sequence Estimation in Acoustic Non-cooperative Communication System

被引：6
|
作者：
Zhang Xiaoming [1 ]
机构：
[1] Southeast Univ, Underwater Acoust Signal Proc Lab, Nanjing, Peoples R China
来源：
2009 INTERNATIONAL SYMPOSIUM ON COMPUTER NETWORK AND MULTIMEDIA TECHNOLOGY (CNMT 2009), VOLUMES 1 AND 2 | 2009年
关键词：
sequence estimation; underwater acoustic non-cooperative communication system; DSSS signals; low signal-to-noise ratio;
D O I：
10.1109/CIS.2009.162
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
An effective algorithm is proposed to estimate the spread spectrum sequence in direct spread spectrum sequence (DSSS) signal with the non-stationary noise for the underwater acoustic non-cooperative communication system. Conventional estimators are generally ineffective in detecting signals under low signal-to-noise ratio (SNR). The estimator proposed in this paper only needs the demodulation for the intercepted data sequence and time synchronization in advance. The first step is to realize the synchronization of the sequence by comparing different position values of the received signals. The second step is to estimate the direct spread spectrum sequence with the preprocessed data sequence after all the synchronizations have been accomplished derived separately. Computer simulation results show the blind estimator has reliable performance under different SNRs.
引用
收藏
页码：187 / 190
页数：4
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