Accession Number : AD0781573

Title :   Troposcatter Convolutional Encoder-Viterbi Decoder.

Descriptive Note : Semiannual Research and Development technical rept. no. 1, 28 Jun 73-Feb 74,


Personal Author(s) : Cohen,Andrew R. ; Heller,Jerrold A.

Report Date : JUN 1974

Pagination or Media Count : 60

Abstract : The objective of the program is the development of a device to lower the bit error rate of a troposcatter channel by correcting errors which occur between the transmission and reception of the digital signal. The decoder is capable of accepting; (1) an analog signal from which a three-bit parallel soft decision (eight-level quantization) can be made or, (2) a one-bit hard decision type signal. The interleaver/deinterleaver concept is to be employed to enhance system performance during periods of signal fading while in the hard decision mode of operation.

Descriptors :   *Tropospheric scatter communications, *Coders, *Decoders, Multiple access, Phase modulation, Error correction codes, Errors, Digital systems, Signals

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE