Abstract
Realizing digital signal demodulation on the general computer is an important research direction in the field of signal processing in recent years. In this paper, the algorithm of BPSK signal demodulation which has high real-time requirements is researched on the general computer. According to the characteristics of “CPU + GPU” heterogeneous computing, the parallel computation model of digital communication is put forward, and BPSK signal demodulation is realized on CUDA platform. Test results show that the computing time ratio of 1:1.7, when the bit error rate can be achieved 10?5.
Highlights
With the constant improvement of the general computer performance, experienced from hardware platform towards digital platform of software radio technology, the platform of digital signal processing in communication system is beginning to change the direction of development
This paper is based on “CPU + GPU” heterogeneous platform, the real-time BPSK signal demodulation algorithm and the method based on CUDA parallel programs are researched
Launched by NVIDIA, CUDA is a kind of general parallel computing architecture, initial designed to speed up image real-time processing which run on the GPU development platform and full use of GPU’s high memory bandwidth and very large scale of floating point calculation unit
Summary
With the constant improvement of the general computer performance, experienced from hardware platform towards digital platform of software radio technology, the platform of digital signal processing in communication system is beginning to change the direction of development. The signal after the A/D directly complete real-time processing in pure software processing way based on general computer platform. Digital Phase modulation, namely Phase Shift Keying (Phase Shift Keying, PSK), is a very important basic digital modulation technology, which using carrier Phase modulation technique information to express input signal. BPSK is a kind of excellent modulation method, and in medium and high speed data transmission has been widely applied. This paper is based on “CPU + GPU” heterogeneous platform, the real-time BPSK signal demodulation algorithm and the method based on CUDA parallel programs are researched. In view of the implementation, parallel programming test verify the feasibility of the system
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