Title :
Performance of digital matched filters in a direct sequence spread spectrum receiver
Author_Institution :
Inst. fur Allgemeine Elektrotech. & Elektron., Tech. Univ. Wien, Austria
Abstract :
Preamble processing combined with an adaptive sampling window technique and selection of the largest value of a certain number of matched-filter output samples is proposed as a data decision strategy for direct-sequence spread-spectrum receivers using digital correlators for baseband matched filtering. The preamble sequence provides exact knowledge of the occurrence of the correlation maximum. System performance is analyzed on the basis of a combinatorial model for the deviation of the signal statistics at the matched filter outputs and a Markov model for the dynamic behavior of the sampling window during reception of a burst. Theoretical system analysis is compared with measurements of the bit-error probability as a function of the receiver input signal/noise ratio
Keywords :
digital filters; filtering and prediction theory; matched filters; radio receivers; spread spectrum communication; Markov model; adaptive sampling window; baseband matched filtering; bit-error probability; burst reception; combinatorial model; data decision strategy; digital correlators; digital matched filters; direct sequence spread spectrum receiver; matched-filter output samples; measurements; preamble processing; preamble sequence; receiver input signal/noise ratio; signal statistics; system analysis; system performance; Adaptive filters; Baseband; Correlators; Digital filters; Filtering; Impedance matching; Matched filters; Sampling methods; Signal analysis; Spread spectrum communication;
Conference_Titel :
Military Communications Conference, 1988. MILCOM 88, Conference record. 21st Century Military Communications - What's Possible? 1988 IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/MILCOM.1988.13505
