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http://dx.doi.org/10.5139/JKSAS.2022.50.3.193

Low Complexity Linear Receiver Implementation of SOQPSK-TG Signal Using the Cross-correlated Trellis-Coded Quadrature Modulation(XTCQM) Technique  

Kim, KyunHoi (Agency for Defense Developement)
Eun, Changsoo (Chungnam National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.50, no.3, 2022 , pp. 193-201 More about this Journal
Abstract
SOQPSK-TG is a modulated signal for aircraft telemetry with excellent frequency efficiency and power efficiency. In this paper, the phase waveform of the partial response SOQPSK-TG modulation is linearly approximated and modeled as a full response double duobinary SOQPSK (SOQPSK-DD) signal. And using the XTCQM method and the Laurent decomposition method, the SOQPSK-DD signal was approximated as OQPSK having linear pulse waveforms, and the results of the two methods were proved to be the same. In addition, it was confirmed that the Laurent decomposition waveform of the SOQPSK-DD signal approximates the Laurent decomposition waveform of the original SOQPSK-TG signal. And it was shown that the decision feedback IQ-detector, which applied the Laurent decomposition waveform of SOQPSK-DD to the detection filter, exhibits almost the same performance even with a simpler waveform than before.
Keywords
SOQPSK-TG; Telemetry; Trellis; XTCQM; Duobinary; Laurent Decomposition;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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