CODING FOR FREQUENCY HOPPED SPREAD SPECTRUM SATELLITE COMMUNICATIONS

Authors
  1. Wang, Q.
  2. Li, G.
  3. Blake, I.F.
  4. Bhargava, V.K.
  5. Chen, Q.
Corporate Authors
Victoria Univ, Victoria BC (CAN) Dept of Electrical and Computer Engineering;Defence Research Establishment Ottawa, Ottawa ONT (CAN);Department of Communications, Ottawa ONT (CAN);Waterloo Univ, Waterloo ONT (CAN)
Abstract
The performance of fast frequency hopped spread spectrum systems with M-ary frequency shift keying modulation (FFH/MFSK) and error correction coding under band multitone and partial band noise jamming are analyzed. Ratio-threshold diversity combining is used. The decoding scheme is error-erasure decoding with metrics generated by the diversity combiner. Capacities of AVC's (Arbitrarily Varying Channel) and differences between capacities of an AVC and a discrete memoryless channel are discussed. Two Gaussian AVC models are described. Comments on relationships between abstract AVC models and practical interference/jamming channels are also given. The coded performance of a slow frequency hopped differential PSK system in the presence of both additive white Gaussian noise (AWGN) and tone jamming is studied. The error correlation due to DPSK demodulation and the effect of tone jamming are considered when evaluating the block and decoded error probability. A parallel approach to the design of universal receivers for unknown and time-varying channels is applied to SFH/DPSK systems in the presence of combined AWGN and tone interference. The optimal receiver for any channel in effect is studied. Designs which satisfy different degradation requirements from optimality are presented.
Keywords
Multitone jamming;Ratio-threshold technique;Reed-Solomon Code;Partial band noise jamming;Arbitrarily varying channel
Report Number
TR-ECE-92-1 — Technical Report; Contractor Report (Final)
Date of publication
01 Apr 1992
Number of Pages
118
DSTKIM No
93-03688
CANDIS No
128544
Format(s):
Hardcopy;Originator's fiche received by DSIS

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