摘要
在对直接序列扩频信号的侦察过程中,PN码与信息码的起始时刻估计是实现解扩的关键。为了解决PN码与信息码的起始时刻的参数估计问题,根据直扩信号的基带信号通过累积能量可以达到最大化的原理,提出了运用二维搜索算法对PN码与信息码同步起始时刻的求解问题,并对伪随机码周期内的信息码元个数进行估计。首先从理论上推导了算法的实现过程,再通过计算机仿真验证了算法的可行性。理论分析和计算机仿真结果表明,算法在较低的信噪比条件下能实现对PN码与信息码的起始时刻的参数估计。
It is the key to realize the recovery of the information that resolves the start of the synchronization of PN code and information code in DSSS. To solve the problem of the start estimation of the synchronization of PN code and information code, and according to the principle that the base - band signal of DS signal can be maximized through accumulation of energy , a method of using a two - dimensional search algorithm, to solve the problem of the start of synchronization of PN code and information code is proposed, and the number of information code in the pseu- do - code modulation is estimated. First, the algorithm realization process has been derived theoretically, then through computer simulation, the feasibility of the algotithm is verified. The result of computer simulation shows that the algo- rithm can implement the start estimation of the synchronization of PN code and information code under lower SNR conditions.
出处
《计算机仿真》
CSCD
北大核心
2009年第10期352-355,共4页
Computer Simulation
关键词
参数估计
同步
能量累积
信息
Parameter estimate
Synchronization
Energy accumulation
Information
