The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
PLL(위상 고정 루프)은 아날로그 FM 신호용 임계값 확장 복조기로 잘 알려져 있습니다. 이 기능은 디지털 FM 신호에 대한 낮은 비트 오류율 복조로 이어질 수 있습니다. PLL에는 기본 주파수 추적 기능도 있으며 LEO(저지구 궤도) 위성의 신호와 같이 도플러 편이가 큰 신호의 복조에 적합합니다. 본 논문에서는 디지털 신호 처리 방식의 디지털 PLL(DSP DPLL)을 사용하여 연속 위상 FSK(CPFSK) 및 가우시안 필터링된 MSK(GMSK) 신호의 복조 방식을 연구합니다. 먼저 우리는 아날로그 PLL(APLL)과 완전히 동일한 DSP DPLL을 제안합니다. 다음으로 우리는 DSP DPLL의 유한 루프 대역폭과 관련된 ISI(Inter-Symbol Interference)를 보상하기 위해 시퀀스 추정 방식을 채택합니다. 컴퓨터 시뮬레이션을 통해 시퀀스 추정기를 갖춘 제안된 DSP DPLL이 AWGN 채널에서 기존 LD(Limiter Discriminator) 감지에 비해 더 나은 BER 성능을 달성할 수 있음이 분명해졌습니다. 우리는 또한 시퀀스 추정기를 갖춘 DSP DPLL이 실제 큰 도플러 편이를 갖는 Rician 페이딩 채널에서 우수한 BER 특성을 가짐을 보여주었습니다.
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부
Yasunori IWANAMI, "Demodulation of CPFSK and GMSK Signals Using Digital Signal Processing DPLL with Sequence Estimator" in IEICE TRANSACTIONS on Communications,
vol. E84-B, no. 1, pp. 26-35, January 2001, doi: .
Abstract: Phase locked loops (PLL's) are well known as a threshold extension demodulator for analogue FM signals. This capability may lead to the low bit error rate demodulation for digital FM signals. A PLL has also its native frequency tracking ability and is suited to the demodulation of the signals having large Doppler shifts, for example signals from Low Earth Orbit (LEO) satellites. In this paper, we study the demodulation scheme of Continuous Phase FSK (CPFSK) and Gaussian filtered MSK (GMSK) signals using a Digital Signal Processing type Digital PLL (DSP DPLL). First we propose a DSP DPLL completely equivalent to an Analog PLL (APLL). Next we adopt the sequence estimation scheme to compensate the Inter-Symbol Interference (ISI) associated with the finite loop bandwidth of the DSP DPLL. Through computer simulations it is clarified that the proposed DSP DPLL with sequence estimator can achieve better BER performance compared with the conventional Limiter Discriminator (LD) detection on the AWGN channel. We have also shown that the DSP DPLL with sequence estimator has excellent BER characteristics on Rician fading channels having actual large Doppler shifts.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e84-b_1_26/_p
부
@ARTICLE{e84-b_1_26,
author={Yasunori IWANAMI, },
journal={IEICE TRANSACTIONS on Communications},
title={Demodulation of CPFSK and GMSK Signals Using Digital Signal Processing DPLL with Sequence Estimator},
year={2001},
volume={E84-B},
number={1},
pages={26-35},
abstract={Phase locked loops (PLL's) are well known as a threshold extension demodulator for analogue FM signals. This capability may lead to the low bit error rate demodulation for digital FM signals. A PLL has also its native frequency tracking ability and is suited to the demodulation of the signals having large Doppler shifts, for example signals from Low Earth Orbit (LEO) satellites. In this paper, we study the demodulation scheme of Continuous Phase FSK (CPFSK) and Gaussian filtered MSK (GMSK) signals using a Digital Signal Processing type Digital PLL (DSP DPLL). First we propose a DSP DPLL completely equivalent to an Analog PLL (APLL). Next we adopt the sequence estimation scheme to compensate the Inter-Symbol Interference (ISI) associated with the finite loop bandwidth of the DSP DPLL. Through computer simulations it is clarified that the proposed DSP DPLL with sequence estimator can achieve better BER performance compared with the conventional Limiter Discriminator (LD) detection on the AWGN channel. We have also shown that the DSP DPLL with sequence estimator has excellent BER characteristics on Rician fading channels having actual large Doppler shifts.},
keywords={},
doi={},
ISSN={},
month={January},}
부
TY - JOUR
TI - Demodulation of CPFSK and GMSK Signals Using Digital Signal Processing DPLL with Sequence Estimator
T2 - IEICE TRANSACTIONS on Communications
SP - 26
EP - 35
AU - Yasunori IWANAMI
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E84-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2001
AB - Phase locked loops (PLL's) are well known as a threshold extension demodulator for analogue FM signals. This capability may lead to the low bit error rate demodulation for digital FM signals. A PLL has also its native frequency tracking ability and is suited to the demodulation of the signals having large Doppler shifts, for example signals from Low Earth Orbit (LEO) satellites. In this paper, we study the demodulation scheme of Continuous Phase FSK (CPFSK) and Gaussian filtered MSK (GMSK) signals using a Digital Signal Processing type Digital PLL (DSP DPLL). First we propose a DSP DPLL completely equivalent to an Analog PLL (APLL). Next we adopt the sequence estimation scheme to compensate the Inter-Symbol Interference (ISI) associated with the finite loop bandwidth of the DSP DPLL. Through computer simulations it is clarified that the proposed DSP DPLL with sequence estimator can achieve better BER performance compared with the conventional Limiter Discriminator (LD) detection on the AWGN channel. We have also shown that the DSP DPLL with sequence estimator has excellent BER characteristics on Rician fading channels having actual large Doppler shifts.
ER -