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.
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)
