Convolutionally coded frequency-hopping communications with nonideal interleaving

The interleaving span of coded frequency-hopped (FH) systems is often constrained to be smaller than the decoder memory length, i.e. nonideal interleaving is performed. An upper bound on the performance of a Viterbi decoder of a convolutional code with nonideal interleaving is presented. A soft deci...

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Veröffentlicht in:IEEE journal on selected areas in communications Jg. 8; H. 5; S. 823 - 836
Hauptverfasser: Laufer, S., Reichman, A.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.06.1990
Institute of Electrical and Electronics Engineers
Schlagworte:
Applied sciences
Coding, codes
Constraint optimization
Convolutional codes
Decoding
Diversity reception
Exact sciences and technology
Frequency
Information, signal and communications theory
Interleaved codes
Jamming
Signal and communications theory
System performance
Telecommunications and information theory
Upper bound
Viterbi algorithm
Frequency shift keying
Theoretical study
Delay time
Decoding
Performance
Code
Viterbi decoding
Optimization
ISSN:0733-8716
Online-Zugang:Volltext
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Zusammenfassung:The interleaving span of coded frequency-hopped (FH) systems is often constrained to be smaller than the decoder memory length, i.e. nonideal interleaving is performed. An upper bound on the performance of a Viterbi decoder of a convolutional code with nonideal interleaving is presented. A soft decision diversity combining technique is introduced, and the performance of combined convolutional and diversity coding subject to worst-case partial band noise jamming is investigated. Optimization of the FH system performance subject to constraints of allowed delay and synthesizer settling time provides the best combination of interleaving span and hopping rate. The FH system considered employs M-ary frequency-shift key (MFSK) modulation and noncoherent demodulation with 2-b soft decision based on Viterbi's ratio-threshold technique.< >
Bibliographie:ObjectType-Article-2
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ISSN:0733-8716
DOI:10.1109/49.56389