FORWARD ERROR-CORRECTION FOR THE AERONAUTICAL SATELLITE COMMUNICATIONS CHANNEL

Authors
  1. Sewards, A.
  2. Beaudet, L.
  3. Ahmed, H.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
The paper identifies the effects on an L-band aeronautical satellite communications channel of ocean-surface multipath and shows that data messages transmitted over the channel exhibit unacceptably high error-rates under typical conditions. Channel characteristics and techniques for reducing the error-rate are discussed, leading to the choice of a diffuse threshold-decodable convolutional forward error-correcting code. Two implementations of coder/decoders for this code are described, one using standard IC logic, and the other a Z-80A microprocessor. Results to tests of the IC coder/decoder with noise, data error bursts, and a system simulator are quoted, which show that the codec performed as expected and is capable of reducing the error-rate to E-5 or better.
Report Number
TN-698 —
Date of publication
15 Feb 1979
Number of Pages
19
DSTKIM No
79-01047
CANDIS No
85402
Format(s):
Hardcopy;Originator's fiche received by DSIS

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