DocumentCode
769844
Title
Adaptive A/D Converter to Suppress CW Interference in DSPN Spread-Spectrum Communications
Author
Amoroso, Frank
Author_Institution
Hughes Aircraft Company, Fullerton, CA
Volume
31
Issue
10
fYear
1983
fDate
10/1/1983 12:00:00 AM
Firstpage
1117
Lastpage
1123
Abstract
The non-Gaussian nature of CW interference is exploited to suppress the CW via the A/D converter following chip demodulation in a direct sequence pseudonoise (DSPN) communication link. The modulation is coherent BPSK. The A/D converter quantizes to 2 bits, sign and magnitude. A scheme of threshold adaptation and postquantization weighting gains great advantage from making very reliable decisions on a relatively small percentage of the demodulated chips. The bit error rate performance in CW interference generally surpasses that of an ideal analog DSPN correlator. The performance in Gaussian noise is within 0.6 dB of ideal analog.
Keywords
A/D converters; ADC; Analog-to-digital conversion (ADC); Phase-shift keying; Pseudonoise-coded communication; Binary phase shift keying; Bit error rate; Circuits; Correlators; Degradation; Gaussian noise; Interference suppression; Local oscillators; Signal to noise ratio; Spread spectrum communication;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1983.1095753
Filename
1095753
Link To Document