CAJ | 학술논문

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.
직접서렬확빈신호(direct sequence spread spectrum,DSSS)시항간우저절획개솔신호,실현기삼수적고계구유중요의의.침대직확신호재빈、마원속솔、상위적고계문제,결합보상관적기본이론,제출료대직확신호재빈、마원속솔、상위고계적보상관방법.이론분석화방진결과표명:재몰유위수궤마서렬급상관삼수선험신식적조건하,해방법능구완성저신조비시대신호적검측화재빈、마속솔、초상적고계,가유효제고계산효솔.
@@@@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.