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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 of wireless communication technology, software radio is one of the most important research directions in the field of communication. Based on the digital orthogonal transform technology of polyphase filtering, this paper proposes a new digital orthogonal demodulation algorithm in software radio through mathematical derivation. The theoretical analysis and simulation results show that the anti-interference performance of the demodulation scheme is significantly improved. Compared with the traditional demodulation method, the local carrier recovery is eliminated. The method has the advantages of high universality, simple and easy implementation, small calculation amount, easy implementation with DSP, Suitable for use in software radio receivers.