一种基于FPGA的改进的正交解调算法

In the system of software radio(SR), modulation technology determines the quality of communication and the usage of different modulation and demodulation technology with different software algorithm is the core idea in it. Based on polyphase filtering technology for digital quadrature transform, this paper presents a new algorithm for digital quadrature demodulation. The algorithm has better quality of demodulation, with low calculation requirement and easier to be realized on field programmable gates array(FPGA). By performance analysis, the algorithm is fit to be implemented in SR receivers.