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http://dx.doi.org/10.5139/JKSAS.2021.49.11.941

PCM/FM With Modulation Index of 2/3  

Gu, Young Mo (Inha Technical College)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.49, no.11, 2021 , pp. 941-944 More about this Journal
Abstract
PCM/FM with a modulation index of 0.7 is widely used in the telemetry field. If the modulation index is slightly changed to 2/3, it can be interpreted as 3-PSK with a state number of 3 in phase transition trellis and can be received with a simple Viterbi decoder. As a result of computer simulation, the Eb/No performance in the AWGN channel is about 8.3 dB when the BER is 10-5, which is close to the theoretical limit.
Keywords
PCM/FM; Modulation Index; Telemetry; Trellis; Viterbi Decoder;
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