For any PN code acquisition system in spread spectrum communications, the acquisition performance is largely dependent on the probabilities of detection and false alarm.
对于任何一种扩频通信pN码捕获系统来说，捕获性能在很大程度上取决于检测概率和虚警概率。
One is the detection of low SNR DSSS signal and extraction of length of PN code, the other is detection of BPSK signal from multi signals.
对直扩信号侦测的计算机模拟结果表明，该方法不仅能检测到低信噪比的此类信号，而且能提取到扩频码周期等参数。
This algorithm firstly calculates the average power serial, and then finishes the detection of PN code rate through the analysis of frequency spectrum and smooth processing.
该算法首先计算序列的平均功率，然后对其进行谱分析并作平滑处理而完成伪码速率的判定。
Secondly, a novel downlink acquisition and synchronization algorithm for IEEE 802.20 OFDMA system is proposed. The algorithm is composed of downlink frame detection and sector PN code identification.
其次，本文提出一种针对IEEE 802.20 OFDMA工作模式的下行捕获和同步算法，该算法分为下行帧头检测和扇区标识值识别两个步骤。
Secondly, a novel downlink acquisition and synchronization algorithm for IEEE 802.20 OFDMA system is proposed. The algorithm is composed of downlink frame detection and sector PN code identification.
其次，本文提出一种针对IEEE 802.20 OFDMA工作模式的下行捕获和同步算法，该算法分为下行帧头检测和扇区标识值识别两个步骤。
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