Error Control Techniques for Satellite and Space Communications

Error Control Techniques for Satellite and Space Communications

ISBN: 1722377135

ISBN 13: 9781722377137

Publication Date: July 06, 2018

Publisher: Createspace Independent Publishing Platform

Pages: 64

Format: Paperback

Author: National Aeronautics and Space Administration

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Worked performed during the reporting period is summarized. Construction of robustly good trellis codes for use with sequential decoding was developed. The robustly good trellis codes provide a much better trade off between free distance and distance profile. The unequal error protection capabilities of convolutional codes was studied. The problem of finding good large constraint length, low rate convolutional codes for deep space applications is investigated. A formula for computing the free distance of 1/n convolutional codes was discovered. Double memory (DM) codes, codes with two memory units per unit bit position, were studied; a search for optimal DM codes is being conducted. An algorithm for constructing convolutional codes from a given quasi-cyclic code was developed. Papers based on the above work are included in the appendix. Costello, Daniel J., Jr. Unspecified Center...