基于谱相关的直接序列扩频信号参数估计  

DSSS Signal Parameter Estimation Based on Cyclic Spectrum

作　　者：刘孟孟[1] 张立民[1] 钟兆根[1] 

机构地区：[1]海军航空工程学院电子信息工程系,山东烟台264001

出　　处：《兵工自动化》2013年第3期57-59,共3页Ordnance Industry Automation

基　　金：国家自然科学基金(61032001;60972159;61002006)

摘　　要：直接序列扩频信号(direct sequence spread spectrum,DSSS)是抗干扰低截获概率信号,实现其参数的估计具有重要意义。针对直扩信号载频、码元速率、相位的估计问题,结合谱相关的基本理论,提出了对直扩信号载频、码元速率、相位估计的谱相关方法。理论分析和仿真结果表明:在没有伪随机码序列及相关参数先验信息的条件下,该方法能够完成低信噪比时对信号的检测和载频、码速率、初相的估计,可有效提高计算效率。It is important to estimate the parameter of direct sequence spread spectrum （DSSS） signal, which is jam-proof and low probability of intercept. Aiming at the problem of parameter estimation for DSSS carrier frequency, chip width and phases, the basic cyclic spectrum theories are synthesized, and a new method which can estimate the parameters of carrier frequency, chip-ratio and phases is proposed. The theory analysis and simulation results show that, without pseudo-random code sequence and corresponding parameter transcendental information, the method can realize signal detection and carrier frequency, chip-rate, initial phase under low SR, and effectively improve calculation efficiency.

关 键 词：直接序列扩频信号 谱相关 检测 参数估计 

分 类 号：TJ02[兵器科学与技术—兵器发射理论与技术]