The Research Of A Digital Intermediate Frequency Module Realized On Dual DSPs

This paper introduces research and optimization of a digital IF module realized on dual DSPs. Firstly gives a brief introduction on practical structure and key technology of software radio, and then basic principle of digital phase modulation, such as DBPSK, DQPSK,π/4-DQPSK and D8PSK, the concept and baseband pulse-shaping digital filter, hardware platform and software design of digital modulation platform, and means of code optimization of down-conversion. Next, gives a test result of the system. At last, makes a brief summary of this paper, and indicates the direction of the improvement.