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多子信道扩谱系统及其抗干扰性能

         

摘要

The introduction of the full paper reviews a number of papers in the open literature, divides these papers into two parts, points out the shortcomings of one part, points out the usefulness of the other, and then proposes the MSCSS system mentioned in the title, which we believe is better than previous ones proposed and which is explained in sections 1 through 3. Their core consists of; " MSCSS system is based on M-ary spread spectrum (SS) , direct sequence spread spectrum (DS-SS) , orthogonal frequency division multiplexing (OFDM) , and multi-carrier code division multiple access (MC-CDMA). The signal is spread twice at the MSCSS transmitter using a channel pseudo-random code and the sub-channel pseudo-codes. Each information bit is transmitted in time-division mode over 16 sub-channels. The pseudo-random codes over the sub-channels are mutually orthogonal. At the receiver, an adaptive decision threshold is employed which provides improved ant-jamming performance. " Simulation results, presented in Figs. 4 through 7 and Table 1, and their analyses show preliminarily that MSCSS system can indeed improve anti-jamming performance.%文章基于多元扩频、直接序列扩频、正交频分复用和多载波码分多址等技术,提出了一种无线通信抗干扰新体制——多子信道扩谱(MSCSS:Multi-Sub-Channels Spread Spectrum)系统.系统的发送端采用信道伪随机码和子信道伪随机码两次扩频,将每一比特信息用16个子信道信号按时分方式传输,各子信道的伪随机码相互正交,其中心频率也相互正交;接收端对每一比特信息采用并行积累,自适应门限判决,实现对多子信道扩谱信号的相关接收处理,从而提高通信系统的抗干扰能力.

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