Abstract: In a direct sequence spread spectrum communication system with long period pseudorandom code, the search speed of the pseudorandom code impacts the overall performance of the receiving system seriously. Aiming at the question on rapid search for long code, a rapid search strategy of long code is proposed, which expands the search scope of pseudorandom code adopting expansion and average technologies. Theoretical analysis and numerical results show that the acquisition method can effectively improve the acquisition speed of the pseudorandom code when searching large-scale codes.

Key words: wireless communication, direct sequence spread spectrum, pseudorandom code, correlation, search

摘要： 在采用长周期扩频码的直接扩频通信系统中，伪码的搜索速度对接收系统整体性能有着至关重要的影响。针对长周期伪码的快速搜索问题，提出一种通过扩展均值处理技术扩大伪码搜索范围的长码快速搜索策略。理论分析和数值结果表明，在进行大范围码元搜索时使用该搜索策略可以有效地提高伪码的搜索速度。

关键词: 无线通信, 直接序列扩频, 扩频码, 相关, 搜索

CLC Number: 

• TP391