摘要
针对在同相与正交相上分别使用不同扩频序列的QPSK-DS信号,结合特征值分解,研究了提取其扩频序列的自同步与识别方法,并在此基础上提出了能量聚积度的概念。通过仿真试验表明,对扩频序列码长为127的QPSK-DS信号,在信噪比为-12dB条件下,实现了QPSK-DS信号中同相与正交相中的扩频序列的同时提取,并且验证了该方法对信号初相不敏感。
The new self-synchronization and identification method of spread-sequence of QPSK-DS signal is presented based on energy concentration firstly.Then by combining eigenvalue analysis,the new spread-sequence extract technique is proposed for QPSK-DS signal.For 127 length of spread-sequence code of QPSK-DS signal,spread-sequence codes in I and Q phases are extracted simultaneously at SNR-12dB.And simulation illustrates that this method is no sensitive to carrier initialized phase.
出处
《电子信息对抗技术》
2009年第5期6-10,15,共6页
Electronic Information Warfare Technology
