Title :
A PR-QMF (wavelet) based spread spectrum communications system
Author :
Hetling, Kenneth ; Medley, Michael ; Saulnier, Gary ; Das, P.
Author_Institution :
Dept. of Electr. Comput. & Syst. Eng., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
A new spread spectrum technique is introduced whereby the spreading and despreading is achieved using PR-QMF filter banks. The transmitted signal is generated using a synthesis filter bank while an analysis filter bank performs the demodulation process. This paper describes the implementation of this technique, its use as a multi-user CDMA system, and its performance against narrowband interference. Monte Carlo simulation is used to determine bit error rate (BER) performance for AWGN, pulse interference, and narrowband (tone) interference. The AWGN BER is then compared to theoretical performance while the jammer suppression results are compared to standard spreading techniques
Keywords :
Gaussian channels; Monte Carlo methods; band-pass filters; code division multiple access; demodulation; error analysis; jamming; quadrature mirror filters; radiofrequency interference; spread spectrum communication; wavelet transforms; AWGN; Monte Carlo simulation; PR-QMF filter banks; analysis filter bank; bit error rate; demodulation process; despreading; jammer suppression; multi-user CDMA system; narrowband interference; performance; pulse interference; spread spectrum technique; synthesis filter bank; tone interference; transmitted signal; wavelet; AWGN; Bit error rate; Communication systems; Filter bank; Interference; Narrowband; Signal generators; Signal processing; Signal synthesis; Spread spectrum communication;
Conference_Titel :
Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE
Conference_Location :
Fort Monmouth, NJ
Print_ISBN :
0-7803-1828-5
DOI :
10.1109/MILCOM.1994.473869
