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适用于δ-相关解扩的扩频码检验方法
龙德浩,陈志清
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(四川大学,成都 610064;成都大学，成都 610106)

摘要:

基于Welch内积定理（IC定理），导出了归一化零时延互相关函数或零时延内积的绝对最大值δ0 的三条基本特性，从而把Welch内积定理演变成了适用于计算量较小、解扩增益较高、有峰值、无旁瓣的δ相关解扩的扩频码检验方法，即“实用Welch内积定理-扩频码检验方法 ”，为作者拟定的“δ/θ型基带相关检测/解扩方案”(电讯技术，2012，52(9)：1438 -1442)的工程应用奠定了扩频码检验与设计的理论基础。这两个检验方法与现存经典（含We lch）扩频码检验方法在参数、结构、判决方式等方面都不相同。

关键词: 扩频码检验 Welch内积定理实用Welch内积定理-扩频码检验 δ 相关解扩

DOI：

基金项目:

Spread-spectrum code test method for δ-correlation despreading

LONG De-hao,CHEN Zhi-qing

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Abstract:

Based on Welch IC theorem, the three basic characteristics of the absolute maximum values δ0 of the normalized zerodelay cross correlation values or zerodelay inner products are derived, thereby, the Wel ch inner products theorem is developed into a practical spreading code test meth od，which is called Welch inner products theoremspreading code test method ，for δcorrelation despreading with less computation,higher despreadi ng gain，a peak,and no sidelobe, in order th at the spreading codes test and design theoretical foundation for “δ/θ ba se b and correlation detection/despreading scheme” proposed by the authors in Teleco mmunication Engineering(201 2,52(9):1438-1442) has been built. The difference s between the two test methods and the existing classic (including Welch) test m ethods for spreading codes are that their parameters, structure, deci sion rule and so on are not the same.

Key words: spreading code test Welch inner products theorem practical Welch inner products theorem spreading code test δ-correlation despreading