Performance of Soft Decision Digital Matched Filter in Direct-Sequence Spread-Spectrum Communication Systems

Nobuhisa KATAOKA; Toshiharu KOJIMA; Makoto MIYAKE; Tadashi FUJINO

Performance of Soft Decision Digital Matched Filter in Direct-Sequence Spread-Spectrum Communication Systems

Nobuhisa KATAOKA, Toshiharu KOJIMA, Makoto MIYAKE, Tadashi FUJINO

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This paper considers the problem of realizing excellent performance of rapid acquisition in direct-sequence spread-spectrum communication systems. In this paper, we consider a scheme of digital matched filter (DMF) combined with soft decision function, which has potential capability of improving the characteristics of hard decision function by about 2dB in the environment of additive white Gaussian noise (AWGN) channel and is capable of handling long PN codes by means of simple LSIs. Analysis is made on the performance in the environment of AWGN channel and results of experiments are provided. It is confirmed that the scheme provides attractive means for acquisition of direct-sequence spread-spectrum signals. Namely, soft decision DMF achieves rapid acquisition; the dwell time for soft decision DMF in the process of acquisition is half of that for hard decision DMF. In addition, it is shown that the correlator output signal produced by the acquisition circuit can also be used for the purpose of demodulation; excellent performance of bit error probability is experimentally observed.

Publication: IEICE TRANSACTIONS on Communications Vol.E74-B No.5 pp.1115-1122

Publication Date: 1991/05/25

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Type of Manuscript: Special Section PAPER (Special Issue on Spread Spectrum Techniques and Its Applications)

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Nobuhisa KATAOKA
Toshiharu KOJIMA
Makoto MIYAKE
Tadashi FUJINO

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Nobuhisa KATAOKA, Toshiharu KOJIMA, Makoto MIYAKE, Tadashi FUJINO, "Performance of Soft Decision Digital Matched Filter in Direct-Sequence Spread-Spectrum Communication Systems" in IEICE TRANSACTIONS on Communications, vol. E74-B, no. 5, pp. 1115-1122, May 1991, doi: .
Abstract: This paper considers the problem of realizing excellent performance of rapid acquisition in direct-sequence spread-spectrum communication systems. In this paper, we consider a scheme of digital matched filter (DMF) combined with soft decision function, which has potential capability of improving the characteristics of hard decision function by about 2dB in the environment of additive white Gaussian noise (AWGN) channel and is capable of handling long PN codes by means of simple LSIs. Analysis is made on the performance in the environment of AWGN channel and results of experiments are provided. It is confirmed that the scheme provides attractive means for acquisition of direct-sequence spread-spectrum signals. Namely, soft decision DMF achieves rapid acquisition; the dwell time for soft decision DMF in the process of acquisition is half of that for hard decision DMF. In addition, it is shown that the correlator output signal produced by the acquisition circuit can also be used for the purpose of demodulation; excellent performance of bit error probability is experimentally observed.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e74-b_5_1115/_p

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@ARTICLE{e74-b_5_1115,
author={Nobuhisa KATAOKA, Toshiharu KOJIMA, Makoto MIYAKE, Tadashi FUJINO, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance of Soft Decision Digital Matched Filter in Direct-Sequence Spread-Spectrum Communication Systems},
year={1991},
volume={E74-B},
number={5},
pages={1115-1122},
abstract={This paper considers the problem of realizing excellent performance of rapid acquisition in direct-sequence spread-spectrum communication systems. In this paper, we consider a scheme of digital matched filter (DMF) combined with soft decision function, which has potential capability of improving the characteristics of hard decision function by about 2dB in the environment of additive white Gaussian noise (AWGN) channel and is capable of handling long PN codes by means of simple LSIs. Analysis is made on the performance in the environment of AWGN channel and results of experiments are provided. It is confirmed that the scheme provides attractive means for acquisition of direct-sequence spread-spectrum signals. Namely, soft decision DMF achieves rapid acquisition; the dwell time for soft decision DMF in the process of acquisition is half of that for hard decision DMF. In addition, it is shown that the correlator output signal produced by the acquisition circuit can also be used for the purpose of demodulation; excellent performance of bit error probability is experimentally observed.},
keywords={},
doi={},
ISSN={},
month={May},}

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TY - JOUR
TI - Performance of Soft Decision Digital Matched Filter in Direct-Sequence Spread-Spectrum Communication Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 1115
EP - 1122
AU - Nobuhisa KATAOKA
AU - Toshiharu KOJIMA
AU - Makoto MIYAKE
AU - Tadashi FUJINO
PY - 1991
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E74-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 1991
AB - This paper considers the problem of realizing excellent performance of rapid acquisition in direct-sequence spread-spectrum communication systems. In this paper, we consider a scheme of digital matched filter (DMF) combined with soft decision function, which has potential capability of improving the characteristics of hard decision function by about 2dB in the environment of additive white Gaussian noise (AWGN) channel and is capable of handling long PN codes by means of simple LSIs. Analysis is made on the performance in the environment of AWGN channel and results of experiments are provided. It is confirmed that the scheme provides attractive means for acquisition of direct-sequence spread-spectrum signals. Namely, soft decision DMF achieves rapid acquisition; the dwell time for soft decision DMF in the process of acquisition is half of that for hard decision DMF. In addition, it is shown that the correlator output signal produced by the acquisition circuit can also be used for the purpose of demodulation; excellent performance of bit error probability is experimentally observed.
ER -