HYBRID AND CONCATENATED CODING APPLICATIONS

International Telemetering Conference Proceedings / October 10-12, 1972 / International Hotel, Los Angeles, CaliforniaThis paper presents some of the results of a study to evaluate the performance and implementation complexity of a concatenated and a hybrid coding system for moderate speed deep space applications. It is shown that with a total complexity of less than three times that of the basic Viterbi decoder, concatenated coding improves a constraint length 8 rate 1/3 Viterbi decoding system by 1.1 and 2.6 dB at bit error probabilities of 10^-4 and 10^-8, respectively. With a somewhat greater total complexity, the hybrid coding system is shown to obtain a 0.9 dB computational performance improvement over the basic rate 1/3 sequential decoding system. Although substantial, these complexities are much less than those required to achieve the same performances with more complex Viterbi or sequential decoder systems.International Foundation for TelemeteringProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection