Title :
Adaptive interference rejection for noncoherent digital direct sequence spread spectrum receivers
Author :
Goiser, A. ; Sust, M. ; Pietsch, W.
Author_Institution :
Tech. Univ. Vienna, Austria
fDate :
30 Sep-3 Oct 1990
Abstract :
The applicability of an adaptive two-bit analog-to-digital technique to noncoherent digital direct-sequence (DS) receivers using single-bit digital correlators is discussed. Operation in the presence of additive white Gaussian noise, (AWGN), continuous wave (CW), and combined CW/AWGN interference is investigated. Receiver performance is evaluated by means of the output signal-to-noise ratio (SNR) of a square-law receiver. Bit error rate (BER) computations are provided to demonstrate the performance of the two-bit analog-to-digital converter (ADC) in a DS matched-filter receiver for code shift keyed data. Two-bit ADC applicability to the detection of DS signals with unknown phase and time-of-arrival, namely synchronization preamble detection and code acquisition, is demonstrated by receiver operating characteristic computations
Keywords :
adaptive filters; analogue-digital conversion; error statistics; matched filters; radio receivers; spread spectrum communication; white noise; AWGN; BER; CW interference; adaptive interference rejection; adaptive two-bit analog-to-digital technique; additive white Gaussian noise; bit error rate computation; code shift keyed data; matched filters; noncoherent digital direct sequence spread spectrum receivers; performance; signal-to-noise ratio; single-bit digital correlators; square-law receiver; Analog-digital conversion; Bit error rate; Costs; Europe; Frequency estimation; Frequency synchronization; Interference; Matched filters; Signal to noise ratio; Spread spectrum communication;
Conference_Titel :
Military Communications Conference, 1990. MILCOM '90, Conference Record, A New Era. 1990 IEEE
Conference_Location :
Monterey, CA
DOI :
10.1109/MILCOM.1990.117450
