软件无线电中的正交解调新算法  

A New Algorithm for Quadrature Demodulation in Software Radio

作　　者：黄红兵[1] 吴志敏[1] 曹敦[1] 

机构地区：[1]长沙理工大学计算机与通信工程学院,湖南长沙410076

出　　处：《通信技术》2008年第1期39-40,56,共3页Communications Technology

基　　金：湖南省教育厅科研基金资助项目(编号:06C115)

摘　　要：软件无线电作为无线通信技术的又一次革命,是目前通信领域中最为重要的研究方向之一。文章基于多相滤波的数字正交变换技术,通过数学推导,提出了一种软件无线电中的数字化正交解调新算法。理论分析和仿真结果显示该解调方案的抗干扰性能有明显改善,与传统解调方法相比,省去了本地载波恢复,通用性强、简单易实现、计算量小且易于用DSP实现,适合在软件无线电接收机中使用。As another revolution in wireless communication, software radio （SR） has become one of the most important research fields. Based on polyphase filtering technology for digital quadrature transform, this paper presents a new algorithm for digital quadrature demodulation in SR through mathematical derivation. Theoretical analysis and simulation results indicate that the noise-resisting property of the demodulation scheme has been improved obviously. Comparing with traditional methods, it omits the resuming of local carrier, and is all-purpose, simple, with low calculation requirement and easier to be realized on DSP. The algorithm is fit to be implemented in SR receivers.

关 键 词：软件无线电 正交解调 多相滤波 

分 类 号：TB911[一般工业技术—计量学]