Title :
Broadband interference suppression in DSSS system using fractional Fourier transform
Author :
Qi, Lin ; Tao, Ran ; Zhou, Siyong
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol., China
Abstract :
This paper proposes a linear FM interference rejection method in direct sequence spectrum spread (DSSS) communication system based on signal synthesis using fractional Fourier transform. The detection and parameter estimation of the interference signal are implemented in fractional Fourier domain and the synthesized estimate of jamming signal is then subtracted from the received signal, the interference immunity of the system can thus be improved. Performance analysis and simulation results showed that, the proposed method works effectively in a wide dynamic range of SNR, and also, it is easy in computation and simple in implementation.
Keywords :
Fourier transforms; frequency modulation; interference suppression; parameter estimation; signal synthesis; spread spectrum communication; SNR; broadband interference suppression; direct sequence spectrum spread communication system; fractional Fourier transform; jamming signal estimation; linear FM interference rejection; parameter estimation; signal synthesis; Analytical models; Computational modeling; Dynamic range; Fourier transforms; Interference suppression; Jamming; Parameter estimation; Performance analysis; Signal synthesis; Spread spectrum communication;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281172
