Title :
A novel approach to FM interference suppression in DS spread-spectrum communication systems
Author :
Fung, H.W. ; Kot, Alex C. ; Li, K.H.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
A new recursive technique for the excision of FM interference in DS spread-spectrum communication system is introduced. The proposed algorithm tabulates the jammer-corrupted received samples as a matrix to model a time-varying process. Input vectors are sent into the matrix to produce upon multiplication output vectors from which the frequency information in the matrix is deduced. The scheme resembles the familiar closed-loop frequency response estimation procedures in classical control theories. The estimated frequency then tunes an adaptive notch filter for interference suppression. The method provides more accurate IF estimates than given by the Wigner-Ville distribution and a performance close to notch filtering at the exact IF at a significantly lower computational requirement
Keywords :
filtering theory; frequency estimation; frequency modulation; interference suppression; jamming; matrix algebra; notch filters; spread spectrum communication; DS spread-spectrum communication systems; DS-SS communication systems; FM interference suppression; Wigner-Ville distribution; adaptive notch filter; algorithm convergence; closed-loop frequency response estimation; frequency information; frequency tracking algorithm; input vectors; jammer-corrupted received samples; matrix; notch filtering; output vectors; recursive technique; time-varying process; Adaptive filters; Communication systems; Control theory; Estimation theory; Filtering; Frequency estimation; Frequency response; Interference suppression; Jamming; Spread spectrum communication;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on
Conference_Location :
Istanbul
Print_ISBN :
0-7803-6293-4
DOI :
10.1109/ICASSP.2000.861102