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.
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)
关键词
软件无线电
正交解调
多相滤波
software radio
quadrature demodulation
polyphase filtering
