It is important to select spreading spectrum code for OCDMA communication.
对于OCD MA通信，扩频码的选择非常重要。
The second part is the third chapter, which explains the PN code adopted by spreading spectrum in this system and the power testing algorithm.
第二部分为第三章主要从软件算法实现方面进行阐述，该部分包括系统扩频码选取及不同长度扩频码性能比较分析和功率检测算法。
Direct sequence spread spectrum technique is the most widely used one and the kernel of the spreading spectrum techniques for people to study.
直接序列扩频技术是应用最广的一种扩频技术，研究它便于掌握扩频技术的精髓。
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