基于软件无线电的DS/DQPSK调制解调器  

Realization of DS/DQPSK Modem Based on Software Radio

作　　者：蔡晶烨[1] 查光明[1] 习友宝[1] 

机构地区：[1]成都电子科技大学,四川成都610054

出　　处：《无线电通信技术》2008年第3期55-57,共3页Radio Communications Technology

摘　　要：一种基于软件无线电的数字DS/DQPSK调制和解扩解调器的FPGA实现方案。采用了调制前的基带成形处理、正交调制、数字匹配滤波解扩和延时差分解调等技术,直接对中频模拟已调信号进行带通采样,然后使用FPGA进行数字信号处理,完成基带数据的解扩解调以及基带时钟提取,不需要进行数字下变频,也不需要进行伪随机码同步捕获和载波提取,简单易行,具有一定的新意和较高的实用价值。A FPGA realization scheme for digital DS/DQPSK modern based on Software Radio is presented, which adopts several advanced techniques such as baseband shaping processing before modulation, quadrature modulation, digital matched filter and delay difference demodulation. It directly performs samlpling for the modulated IF signal under the bandpass sampling theorem, then performs the digital signal processing by using FPGA, completes the demodulation and clock extraction without digital down conversion, PN code synchronization and carder extraction.

关 键 词：DS/QPSK FPGA 软件无线电 数字相关器 延时差分解调 

分 类 号：TN92[电子电信—通信与信息系统]