Design and Realization of Fast Code Acquisition for the Large Doppler Offset and Long PN Code Spread Spectrum System
Pla G · JOURNAL OF ELECTRONICS INFORMATION TECHNOLOGY · 2007
Based on the discrete-time signal processing,the representation of Doppler effect on code acquisition performance is analyzed and the principle of combining partial-matched filter with FFT is given in this paper.A fast code acquisition architecture by using partial-matched filter with FFT for the large Doppler offset and long PN code spread spectrum system is designed and realized with FPGA and DSP.This architecture provides a very good trade-off between acquisition performance and complexity.Application results show this architecture is very attractive for mobile satellite communication and DS/SS anti-jamming communication.