Research and software realization of broadband multi-channel and multi-rate signal demodulation

Demodulation of multi-channel and multi-rate broadband signal is an important technology in digital communication and reconnaissance processing. Based on the design concept of software radio, after the study of symbol synchronization and carrier synchronization technology in demodulation process, this paper proposed a automatic demodulation scheme of multi-channel and multi-rate broadband signal. According to the AltiVec technology, the CACHE technology, the accelerating optimization software in of multi-core collaborative stream processing, this demodulation algorithm is realized on the digital processing platform of T4240 multicore processors. Finally QPSK signal is taken as an example to complete the experiment and result analysis. The results show that the performance of demodulation algorithm is higher, and the method of multi-channel and multi-rate broadband signal demodulation in software way has the advantages that the software is easier to implement, the algorithm is easier to upgrade and maintain, the parameters of demodulation signal are more easily to be configurated. According to optimizing processing, the real-time processing ability of the algorithm is stronger, and it can meet the demodulation performance requirements of more channel and wider broadband signal.