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研究了一个扩频码分多址（ＤＳ／ＣＤＭＡ）通信系统的伪随机码捕捉性能，伪随机码捕捉采用常用的平方律捕捉检测器。分析了在多址干扰下捕捉性能所受到的影响，模型中假定有ｋ个同时工作的用户，并且到达接收机的所有用户都是等功率的，分析结果表明，随着用户数的增加，多址干扰增大（接收机信噪比恶化），平均捕捉时间迅速增长，同时，检测器的是佳工作门限也随着多址干扰的变化而大幅度变化。门限的选择将严重影响系统的捕捉性能；蒙特卡罗仿真结果同分析结果进行了比较。
A pseudo-random code acquisition performance of a spread spectrum code division multiple access (DS / CDMA) communication system is studied. The pseudo-random code capture uses a common square law capture detector. The impact of the acquisition performance under multiple access interference is analyzed. Suppose there are k simultaneous users in the model, and all the users who reach the receiver are equal power. The analysis results show that with the increase of the number of users The interference of the site increases (the SNR of the receiver deteriorates) and the average capture time increases rapidly. Meanwhile, the detector’s good working threshold also changes greatly with the change of the multiple access interference. Threshold selection will seriously affect the system’s capture performance; Monte Carlo simulation results with the analysis results were compared.