RATE COMPATIBLE PUNCTURED CODES, THEIR USE IN MILITARY SATELLITE COMMUNICATION SYSTEMS

Authors
  1. Wagner, L.C.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The problem of interfacing older military terminal equipments, which work exclusively from an internal timing source, into a communication system that requires all terminals to synchronise to the network clock is addressed in this paper. These data communication systems would typically operate with a fixed symbol transmission rate and employ end-to-end convolutional coding for channel errors. A scheme is proposed which would allow a clock discrepancy of up to + or - 4% between the terminal clock and the network clock. The method proposed is to add control bits to the information stream between terminals. The control bits would allow the effective information rate to either increase or decrease by + or - 4%. The overall symbol rate of the communication link is held constant by selecting a higher rate convolutional code from the set of rate compatible punctured codes (RCPCs). TRUNCATED
Report Number
DREO-TN-89-19 — Technical Note
Date of publication
15 Aug 1989
Number of Pages
31
DSTKIM No
90-00439
CANDIS No
62717
Format(s):
Hardcopy;Originator's fiche received by DSIS

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