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
교통관련 기업, 지자체, 공공기관에서 흔히 사용하는 150MHz와 400MHz의 주파수 대역에서 동작하는 협대역 디지털 육상이동 시스템이 개발되어 혼잡이 매우 심하다. 채널 분리를 기존 FM 시스템의 약 절반인 6.25kHz로 줄이면 이 대역에 수용할 수 있는 사용자 수는 거의 두 배로 늘어납니다. 9.6kbps의 캐리어 비트 전송률은 롤오프 계수가 4인 π/0.2 시프트 QPSK 변조를 사용하여 달성됩니다. 실험실 및 현장 테스트 결과는 다음과 같습니다. (1) 전파 지연 확산이 없으면 BER은 10입니다.-2 공간 다양성을 사용하지 않고 얻은 것입니다. (2) 10μs의 전파 지연 확산, BER 6
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Eimatsu MORIYAMA, Yukiyoshi KAMIO, Kiyoshi HAMAGUCHI, "Development of Narrow-Band Digital Land Mobile Radio" in IEICE TRANSACTIONS on Communications,
vol. E83-B, no. 5, pp. 1094-1105, May 2000, doi: .
Abstract: A narrow-band digital land mobile system has been developed that operates in the frequency bands of 150 and 400 MHz, which are commonly used by transportation-related companies, local government, and public-sector organizations--and are therefore very congested. The number of users that can be accommodated in these bands is almost doubled by reducing the channel separation to 6.25 kHz, about half that of a conventional FM system. A carrier bit rate of 9.6 kbps is achieved by using π/4 shift QPSK modulation with a roll-off factor of 0.2. Laboratory and field testing showed that: (1) Without propagation delay spread, a BER of 10-2 was obtained without using space diversity. (2) With a propagation delay spread of 10 µs, a BER of 6
URL: https://global.ieice.org/en_transactions/communications/10.1587/e83-b_5_1094/_p
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@ARTICLE{e83-b_5_1094,
author={Eimatsu MORIYAMA, Yukiyoshi KAMIO, Kiyoshi HAMAGUCHI, },
journal={IEICE TRANSACTIONS on Communications},
title={Development of Narrow-Band Digital Land Mobile Radio},
year={2000},
volume={E83-B},
number={5},
pages={1094-1105},
abstract={A narrow-band digital land mobile system has been developed that operates in the frequency bands of 150 and 400 MHz, which are commonly used by transportation-related companies, local government, and public-sector organizations--and are therefore very congested. The number of users that can be accommodated in these bands is almost doubled by reducing the channel separation to 6.25 kHz, about half that of a conventional FM system. A carrier bit rate of 9.6 kbps is achieved by using π/4 shift QPSK modulation with a roll-off factor of 0.2. Laboratory and field testing showed that: (1) Without propagation delay spread, a BER of 10-2 was obtained without using space diversity. (2) With a propagation delay spread of 10 µs, a BER of 6
keywords={},
doi={},
ISSN={},
month={May},}
부
TY - JOUR
TI - Development of Narrow-Band Digital Land Mobile Radio
T2 - IEICE TRANSACTIONS on Communications
SP - 1094
EP - 1105
AU - Eimatsu MORIYAMA
AU - Yukiyoshi KAMIO
AU - Kiyoshi HAMAGUCHI
PY - 2000
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E83-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2000
AB - A narrow-band digital land mobile system has been developed that operates in the frequency bands of 150 and 400 MHz, which are commonly used by transportation-related companies, local government, and public-sector organizations--and are therefore very congested. The number of users that can be accommodated in these bands is almost doubled by reducing the channel separation to 6.25 kHz, about half that of a conventional FM system. A carrier bit rate of 9.6 kbps is achieved by using π/4 shift QPSK modulation with a roll-off factor of 0.2. Laboratory and field testing showed that: (1) Without propagation delay spread, a BER of 10-2 was obtained without using space diversity. (2) With a propagation delay spread of 10 µs, a BER of 6
ER -