Suppression of Pulsed CW Interference in QPSK Systems Using Decision-Feedback Filters

Iwao SASASE; Shinsaku MORI

Suppression of Pulsed CW Interference in QPSK Systems Using Decision-Feedback Filters

Iwao SASASE, Shinsaku MORI

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The performance of QPSK systems using decision-feedback (DF) filters in the presence of the pulsed continuous wave (CW) interference is analyzed. We derive the general analytic expressions for the optimum tap weights and the improvement factor of the signal-to-noise ratio (SNR) for both one-sided and two-sided transversal filters with and without DF taps. We find that in the presence of the pulsed CW interference, the leading taps of the two-sided filter plays an important role to suppress the pulsed CW interference, and therefore, the output SNR of the two-sided filter with DF is most improved. The transient behavior of the DF filters are also considered and it is found that the settling time of the two-sided filter with DF is almost the same as that one-sided filter with DF.

Publication: IEICE TRANSACTIONS on transactions Vol.E73-E No.7 pp.1187-1197

Publication Date: 1990/07/25

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Type of Manuscript: PAPER

Category: Radio Communication

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Iwao SASASE
Shinsaku MORI

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Iwao SASASE, Shinsaku MORI, "Suppression of Pulsed CW Interference in QPSK Systems Using Decision-Feedback Filters" in IEICE TRANSACTIONS on transactions, vol. E73-E, no. 7, pp. 1187-1197, July 1990, doi: .
Abstract: The performance of QPSK systems using decision-feedback (DF) filters in the presence of the pulsed continuous wave (CW) interference is analyzed. We derive the general analytic expressions for the optimum tap weights and the improvement factor of the signal-to-noise ratio (SNR) for both one-sided and two-sided transversal filters with and without DF taps. We find that in the presence of the pulsed CW interference, the leading taps of the two-sided filter plays an important role to suppress the pulsed CW interference, and therefore, the output SNR of the two-sided filter with DF is most improved. The transient behavior of the DF filters are also considered and it is found that the settling time of the two-sided filter with DF is almost the same as that one-sided filter with DF.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e73-e_7_1187/_p

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@ARTICLE{e73-e_7_1187,
author={Iwao SASASE, Shinsaku MORI, },
journal={IEICE TRANSACTIONS on transactions},
title={Suppression of Pulsed CW Interference in QPSK Systems Using Decision-Feedback Filters},
year={1990},
volume={E73-E},
number={7},
pages={1187-1197},
abstract={The performance of QPSK systems using decision-feedback (DF) filters in the presence of the pulsed continuous wave (CW) interference is analyzed. We derive the general analytic expressions for the optimum tap weights and the improvement factor of the signal-to-noise ratio (SNR) for both one-sided and two-sided transversal filters with and without DF taps. We find that in the presence of the pulsed CW interference, the leading taps of the two-sided filter plays an important role to suppress the pulsed CW interference, and therefore, the output SNR of the two-sided filter with DF is most improved. The transient behavior of the DF filters are also considered and it is found that the settling time of the two-sided filter with DF is almost the same as that one-sided filter with DF.},
keywords={},
doi={},
ISSN={},
month={July},}

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TY - JOUR
TI - Suppression of Pulsed CW Interference in QPSK Systems Using Decision-Feedback Filters
T2 - IEICE TRANSACTIONS on transactions
SP - 1187
EP - 1197
AU - Iwao SASASE
AU - Shinsaku MORI
PY - 1990
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E73-E
IS - 7
JA - IEICE TRANSACTIONS on transactions
Y1 - July 1990
AB - The performance of QPSK systems using decision-feedback (DF) filters in the presence of the pulsed continuous wave (CW) interference is analyzed. We derive the general analytic expressions for the optimum tap weights and the improvement factor of the signal-to-noise ratio (SNR) for both one-sided and two-sided transversal filters with and without DF taps. We find that in the presence of the pulsed CW interference, the leading taps of the two-sided filter plays an important role to suppress the pulsed CW interference, and therefore, the output SNR of the two-sided filter with DF is most improved. The transient behavior of the DF filters are also considered and it is found that the settling time of the two-sided filter with DF is almost the same as that one-sided filter with DF.
ER -