摘要
为了解决直扩信号伪码周期和序列估计的难题,提出了功率谱二次处理结合信号子空间分解的方法。该方法首先利用功率谱二次处理手段估计出直接序列扩频(DS-SS)信号的伪码周期,在此基础上采用信号子空间分解对DS-SS信号伪码序列进行盲估计。为了用信号子空间分解法对伪码序列实施精确估计,在其后加上了r1校正方法。计算机模拟结果表明,该方法在输入信噪比小于-14 dB时还能良好地工作。
The spectral analysis and signal subspace analysis are applied to estimate the direct sequence spread spectrum （DS-SS） signals, and a method combining the reprocessing methed of power spectrum and the signal subspace analysis is proposed to realize period and sequence estimation of the low-SNR DS-SS signals. In order to estimate the PN （pseudo noise） sequence accurately, the method of r1 corrector is utilized after the signal subspace analysis. The computer simulations show that these methods can work well at SNR〈 - 14 dB of input DS-SS signals.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2005年第8期1365-1368,共4页
Systems Engineering and Electronics
基金
清华大学深圳研究生院博士后基金资助课题(023100012)
