一种基于SAWTDL的次最优M元扩频接收机  

A Semi-optimal M-ary Spread Spectrum Receiver Based on SAWTDL

作　　者：褚振勇[1] 魏强[2] 田红心[3] 易克初[3] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077 [2]中国电子科技集团公司第26研究所,重庆400060 [3]西安电子科技大学综合业务网国家重点实验室,陕西西安710071

出　　处：《压电与声光》2006年第2期133-136,139,共5页Piezoelectrics & Acoustooptics

基　　金：国防科技重点实验室基金项目(51473020105JB3203)

摘　　要：针对最优M元扩频接收机复杂度高的问题,提出了一种低复杂度的次最优M元扩频接收机方案。它的发端使用修正的正交循环码进行M元扩频,降低了组合相关干扰。接收端只需要一个低位声表面波抽头延迟线(SAWTDL)器件就可实现M元解扩,避免了SAWTDL器件一致性问题的困扰。分析了频偏对系统性能的影响,结果显示,该系统的抗频偏能力要好于最优接收机。A novel semi-optimal M-ary spread spectrum receiver is proposed in this paper. Paying no attention to the consistency of SAWTDL devices, the proposed receiver can achieve M-ary despread spectrum with only one chip SAWTDL device. Meanwhile, the influence of combination-correlation interfere can be reduced by employing the presented Modified Orthogonal Cyclic Codes for M-ary spread spectrum. The analysis of the system performance in present of carrier frequency offset is also described. This novel receiver is simple in structure and has much stronger ability against frequency offset than that of the optimal receiver.

关 键 词：M元扩频 修正的正交循环码 声表面波抽头延迟线 

分 类 号：TN914.53[电子电信—通信与信息系统]