Recently, in the modem, the spread spectrum communication system and the software radio, Digital Signal Processor type Squaring Loop (DSP-squaring-loop) is employed in the demodulation of Binary Phase Shift Keying (BPSK) signal. The DSP-squaring-loop extracts the carrier signal that is used for the coherent detection. However, in case the Signal to Noise Ratio (SNR) is low, the DSP-Phase Locked Loop (DSP-PLL) can not pull in the frequency offset and the phase offset. In this paper, we propose a DSP-squaring-loop that is robust against noise and which uses the adaptive notch filter type frequency estimator and the adaptive Band Pass Filter (BPF). The proposed method can extract the carrier signal in the low SNR environment. The effectiveness of the proposed method is confirmed by the computer simulation results.
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Shigeki OBOTE, Yasuaki SUMI, Yoshio ITOH, Yutaka FUKUI, Masaki KOBAYASHI, "Robust DSP Type Squaring Loop with Adaptive Notch Filter Type Frequency Estimator and Adaptive BPF" in IEICE TRANSACTIONS on Fundamentals,
vol. E84-A, no. 2, pp. 441-448, February 2001, doi: .
Abstract: Recently, in the modem, the spread spectrum communication system and the software radio, Digital Signal Processor type Squaring Loop (DSP-squaring-loop) is employed in the demodulation of Binary Phase Shift Keying (BPSK) signal. The DSP-squaring-loop extracts the carrier signal that is used for the coherent detection. However, in case the Signal to Noise Ratio (SNR) is low, the DSP-Phase Locked Loop (DSP-PLL) can not pull in the frequency offset and the phase offset. In this paper, we propose a DSP-squaring-loop that is robust against noise and which uses the adaptive notch filter type frequency estimator and the adaptive Band Pass Filter (BPF). The proposed method can extract the carrier signal in the low SNR environment. The effectiveness of the proposed method is confirmed by the computer simulation results.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e84-a_2_441/_p
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@ARTICLE{e84-a_2_441,
author={Shigeki OBOTE, Yasuaki SUMI, Yoshio ITOH, Yutaka FUKUI, Masaki KOBAYASHI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Robust DSP Type Squaring Loop with Adaptive Notch Filter Type Frequency Estimator and Adaptive BPF},
year={2001},
volume={E84-A},
number={2},
pages={441-448},
abstract={Recently, in the modem, the spread spectrum communication system and the software radio, Digital Signal Processor type Squaring Loop (DSP-squaring-loop) is employed in the demodulation of Binary Phase Shift Keying (BPSK) signal. The DSP-squaring-loop extracts the carrier signal that is used for the coherent detection. However, in case the Signal to Noise Ratio (SNR) is low, the DSP-Phase Locked Loop (DSP-PLL) can not pull in the frequency offset and the phase offset. In this paper, we propose a DSP-squaring-loop that is robust against noise and which uses the adaptive notch filter type frequency estimator and the adaptive Band Pass Filter (BPF). The proposed method can extract the carrier signal in the low SNR environment. The effectiveness of the proposed method is confirmed by the computer simulation results.},
keywords={},
doi={},
ISSN={},
month={February},}
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TY - JOUR
TI - Robust DSP Type Squaring Loop with Adaptive Notch Filter Type Frequency Estimator and Adaptive BPF
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 441
EP - 448
AU - Shigeki OBOTE
AU - Yasuaki SUMI
AU - Yoshio ITOH
AU - Yutaka FUKUI
AU - Masaki KOBAYASHI
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E84-A
IS - 2
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - February 2001
AB - Recently, in the modem, the spread spectrum communication system and the software radio, Digital Signal Processor type Squaring Loop (DSP-squaring-loop) is employed in the demodulation of Binary Phase Shift Keying (BPSK) signal. The DSP-squaring-loop extracts the carrier signal that is used for the coherent detection. However, in case the Signal to Noise Ratio (SNR) is low, the DSP-Phase Locked Loop (DSP-PLL) can not pull in the frequency offset and the phase offset. In this paper, we propose a DSP-squaring-loop that is robust against noise and which uses the adaptive notch filter type frequency estimator and the adaptive Band Pass Filter (BPF). The proposed method can extract the carrier signal in the low SNR environment. The effectiveness of the proposed method is confirmed by the computer simulation results.
ER -