Title :
Soft-limiter receivers for coded DS/DPSK systems
Author :
Stüber, Gordon L.
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
1/1/1990 12:00:00 AM
Abstract :
The performance of a soft-limiter metric and a quantized soft-limiter metric is evaluated for coded DS/DPSK (direct sequence/differential phase shift keying) in the presence of worst case pulse jamming and background noise. The metrics are easy to implement and do not require jammer state information. Instead they rely on the use of receiver thresholds, which must be adjusted according to the code rate and the received bit-energy-to-background-noise ratio. The performance of the metrics is evaluated by using the cutoff rate criterion and a number of specific convolutional and block codes. It is shown that the metrics can offer a significant soft-decision decoding gain and can perform to within 0.5-1.5 dB of the maximum-likelihood soft-decision metric with perfect jammer state information
Keywords :
decoding; fading; jamming; phase shift keying; radio receivers; signal detection; spread spectrum communication; background noise; block codes; coded DS/DPSK systems; convolutional codes; cutoff rate criterion; direct sequence/differential phase shift keying; quantized soft-limiter metric; receiver thresholds; soft limiter receivers; soft-decision decoding gain; spread spectrum communication; worst case pulse jamming; Background noise; Convolutional codes; Differential quadrature phase shift keying; Fading; Interference; Jamming; Maximum likelihood decoding; Modulation coding; Signal to noise ratio; Spread spectrum communication;
Journal_Title :
Communications, IEEE Transactions on
