A Simple Synchronization Acquisition Method for DS/SS System under Carrier Frequency Offset

Nozomu NISHINAGA; Masato NAKAGAMI; Yoshihiro IWADARE

A Simple Synchronization Acquisition Method for DS/SS System under Carrier Frequency Offset

Nozomu NISHINAGA, Masato NAKAGAMI, Yoshihiro IWADARE

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Recently, the low earth orbit satellite communications has been attracting much attention. These communications have many strong features, however, the communication performances are influenced by carrier frequency offset (CFO) and, particularly, it is hard to acquire the synchronization. A large number of publications have so far been made on the synchronization acquisition of DS/SS systems under CFO and most of them make use of the maximum likelihood decision in finding the maximum values of Fourier transform outputs. However, the implementations of Fourier transforms usually require high cost and large space. In this paper, we propose a new simple acquisition scheme using half-symbol differential decoding technique for DS/SS systems under CFO. This scheme makes use of the addition and subtraction of baseband signals and their delayed versions, (omitting Fourier transforms), together with integrations by recursive integrators, and thus resulting in much simpler implementation. In general, it is shown that the proposed scheme can acquire the code synchronization under carrier frequency offset with much smaller computational complexities and the sacrifice of longer acquisition time.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E80-A No.11 pp.2162-2171

Publication Date: 1997/11/25

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Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications)

Category: Communications/Coded Modulation/Spread Spectrum

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Nozomu NISHINAGA, Masato NAKAGAMI, Yoshihiro IWADARE, "A Simple Synchronization Acquisition Method for DS/SS System under Carrier Frequency Offset" in IEICE TRANSACTIONS on Fundamentals, vol. E80-A, no. 11, pp. 2162-2171, November 1997, doi: .
Abstract: Recently, the low earth orbit satellite communications has been attracting much attention. These communications have many strong features, however, the communication performances are influenced by carrier frequency offset (CFO) and, particularly, it is hard to acquire the synchronization. A large number of publications have so far been made on the synchronization acquisition of DS/SS systems under CFO and most of them make use of the maximum likelihood decision in finding the maximum values of Fourier transform outputs. However, the implementations of Fourier transforms usually require high cost and large space. In this paper, we propose a new simple acquisition scheme using half-symbol differential decoding technique for DS/SS systems under CFO. This scheme makes use of the addition and subtraction of baseband signals and their delayed versions, (omitting Fourier transforms), together with integrations by recursive integrators, and thus resulting in much simpler implementation. In general, it is shown that the proposed scheme can acquire the code synchronization under carrier frequency offset with much smaller computational complexities and the sacrifice of longer acquisition time.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e80-a_11_2162/_p

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@ARTICLE{e80-a_11_2162,
author={Nozomu NISHINAGA, Masato NAKAGAMI, Yoshihiro IWADARE, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Simple Synchronization Acquisition Method for DS/SS System under Carrier Frequency Offset},
year={1997},
volume={E80-A},
number={11},
pages={2162-2171},
abstract={Recently, the low earth orbit satellite communications has been attracting much attention. These communications have many strong features, however, the communication performances are influenced by carrier frequency offset (CFO) and, particularly, it is hard to acquire the synchronization. A large number of publications have so far been made on the synchronization acquisition of DS/SS systems under CFO and most of them make use of the maximum likelihood decision in finding the maximum values of Fourier transform outputs. However, the implementations of Fourier transforms usually require high cost and large space. In this paper, we propose a new simple acquisition scheme using half-symbol differential decoding technique for DS/SS systems under CFO. This scheme makes use of the addition and subtraction of baseband signals and their delayed versions, (omitting Fourier transforms), together with integrations by recursive integrators, and thus resulting in much simpler implementation. In general, it is shown that the proposed scheme can acquire the code synchronization under carrier frequency offset with much smaller computational complexities and the sacrifice of longer acquisition time.},
keywords={},
doi={},
ISSN={},
month={November},}

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TY - JOUR
TI - A Simple Synchronization Acquisition Method for DS/SS System under Carrier Frequency Offset
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2162
EP - 2171
AU - Nozomu NISHINAGA
AU - Masato NAKAGAMI
AU - Yoshihiro IWADARE
PY - 1997
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E80-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 1997
AB - Recently, the low earth orbit satellite communications has been attracting much attention. These communications have many strong features, however, the communication performances are influenced by carrier frequency offset (CFO) and, particularly, it is hard to acquire the synchronization. A large number of publications have so far been made on the synchronization acquisition of DS/SS systems under CFO and most of them make use of the maximum likelihood decision in finding the maximum values of Fourier transform outputs. However, the implementations of Fourier transforms usually require high cost and large space. In this paper, we propose a new simple acquisition scheme using half-symbol differential decoding technique for DS/SS systems under CFO. This scheme makes use of the addition and subtraction of baseband signals and their delayed versions, (omitting Fourier transforms), together with integrations by recursive integrators, and thus resulting in much simpler implementation. In general, it is shown that the proposed scheme can acquire the code synchronization under carrier frequency offset with much smaller computational complexities and the sacrifice of longer acquisition time.
ER -