발사체의 속도가 FTS 수신기의 성능에 미치는 영향 (Effects of Launching Vehicle's Velocity on the Performance of FTS Receiver)

서지정보

· 발행기관 : 사단법인 한국위성정보통신학회
· 수록지 정보 : 한국위성정보통신학회논문지 / 9권 / 3호 / 27 ~ 32페이지
· 저자명 : 강상기

초록

A doppler shift is generated by moving a transmitter or receiver operated in communication systems. The doppler frequencyshift between a transmitter and a receiver or the frequency offset present in transceivers must be removed to get the wantedsystem performance. FTS is used for preventing an accident from operating abnormally and for guaranteeing publicprotection. A launching vehicle's initial velocity is very fast in order to escape the earth and the amount of doppler shiftis large.
Recently many studies to adopt the next generation FTS are ongoing. To introduce new FTS, the effects of doppler shifton the performance of the new FTS must be studied. In this paper the doppler effect caused by launching vehicle's velocityaffecting the performance of FTS receiver is investigated into two cases, one is for EFTS as a digital FTS and the otheris for FTS using a tone signal. Noncoherent DPSK and noncoherent CPFSK are considered as the modulation methods ofEFTS. In the cases of the doppler frequency shift of 200Hz present in EFTS using noncoherent DPSK and noncoherentCPFSK are simulated. Simulation results show that Eb/No of 0.5dB deteriorates in the region of near BER of about 10⁻⁵in RS coding. And there is no performance variation in Eb/No or Eb/No is worsened about 0.1dB in the same BER regionfor the case of using convolutional and BCH coding. Quadrature detector used in FTS using tone signals is not influencedby the doppler frequency shift.

영어초록

A doppler shift is generated by moving a transmitter or receiver operated in communication systems. The doppler frequencyshift between a transmitter and a receiver or the frequency offset present in transceivers must be removed to get the wantedsystem performance. FTS is used for preventing an accident from operating abnormally and for guaranteeing publicprotection. A launching vehicle's initial velocity is very fast in order to escape the earth and the amount of doppler shiftis large.
Recently many studies to adopt the next generation FTS are ongoing. To introduce new FTS, the effects of doppler shifton the performance of the new FTS must be studied. In this paper the doppler effect caused by launching vehicle's velocityaffecting the performance of FTS receiver is investigated into two cases, one is for EFTS as a digital FTS and the otheris for FTS using a tone signal. Noncoherent DPSK and noncoherent CPFSK are considered as the modulation methods ofEFTS. In the cases of the doppler frequency shift of 200Hz present in EFTS using noncoherent DPSK and noncoherentCPFSK are simulated. Simulation results show that Eb/No of 0.5dB deteriorates in the region of near BER of about 10⁻⁵in RS coding. And there is no performance variation in Eb/No or Eb/No is worsened about 0.1dB in the same BER regionfor the case of using convolutional and BCH coding. Quadrature detector used in FTS using tone signals is not influencedby the doppler frequency shift.

참고자료

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