An extended cutoff rate for frequency-hopping communications with non-ideal interleaving

Shaul Laufer*, Jakov Snyders

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


Summary form only given. The suitability of the capacity C and the cutoff rate R0, which are the customary measures for evaluating the channel's ability to transmit information reliably, turns out to be questionable with respect to frequency-hopping communications over channels with partial-band jamming and nonideal interleaving. More explicitly, nonideal pseudorandom block interleaving is assumed, resulting in a block interference channel with a noise severity level that depends on the number of jammed hops in each block of interleaving. As the interleaving span increases, R0 for this channel departs, inadequately, from the cutoff rate for the memoryless channel. Also, C does not reflect the behavior of the channel when short block codes, those usually encountered in interleaved communications, are used. An extended cutoff rate R0e for channels with block memory has been obtained. Expressions for the extended cutoff rate have been derived in both the presence and absence of side information. As the interleaving span tends to infinity, R0e converges asymptotically and apparently monotonically to R0 for the memoryless case.

Original languageEnglish
Number of pages1
StatePublished - 1990
Event1990 IEEE International Symposium on Information Theory - San Diego, CA, USA
Duration: 14 Jan 199019 Jan 1990


Conference1990 IEEE International Symposium on Information Theory
CitySan Diego, CA, USA


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