• Title/Summary/Keyword: Laurent Decomposition

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Low Complexity Linear Receiver Implementation of SOQPSK-TG Signal Using the Cross-correlated Trellis-Coded Quadrature Modulation(XTCQM) Technique (SOQPSK-TG 신호의 교차상관 격자부호화 직교변조(XTCQM) 기법을 사용한 저복잡도 선형 수신기 구현)

  • Kim, KyunHoi;Eun, Changsoo
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.50 no.3
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    • pp.193-201
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    • 2022
  • 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.

SUBALGEBRAS OF A q-ANALOG FOR THE VIRASORO ALGEBRA

  • Nam, Ki-Bong;Wang, Moon-Ok
    • Bulletin of the Korean Mathematical Society
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    • v.40 no.4
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    • pp.545-551
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    • 2003
  • We define subalgebras ${V_q}^{mZ{\times}nZ}\;of\;V_q\;where\;V_q$ are in the paper [4]. We show that the Lie algebra ${V_q}^{mZ{\times}nZ}$ is simple and maximally abelian decomposing. We may define a Lie algebra is maximally abelian decomposing, if it has a maximally abelian decomposition of it. The F-algebra automorphism group of the Laurent extension of the quantum plane is found in the paper [4], so we find the Lie automorphism group of ${V_q}^{mZ{\times}nZ}$ in this paper.