Relay Method of Sending Soft Decision Symbol Based on the Result of Error Detecting Code in Cooperative Communication

Yuki FUKUYAMA; Osamu TAKYU; Koichi ADACHI; Masao NAKAGAWA

doi:10.1093/ietfec/e90-a.11.2404

Relay Method of Sending Soft Decision Symbol Based on the Result of Error Detecting Code in Cooperative Communication

Yuki FUKUYAMA, Osamu TAKYU, Koichi ADACHI, Masao NAKAGAWA

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Transmit diversity gain can be obtained in cooperative communication by cooperating the multiple users with single antenna. In cooperative communication, in the first step, each mobile station (MS) transmits its own data to both the base station (BS) and the other MS. In the second step, each MS's data is transmitted from the other MS to BS. As a result, transmit diversity gain can be obtained without implementing multiple transmit antennas at MS. In the conventional relay method, if error is detected within the received packet by using cyclic redundancy check (CRC) code, MS transmits its own data to BS instead of relaying the other MS's data in the second step. As a result, transmit diversity gain cannot be obtained. In this paper, we propose a novel cooperative method. In the proposed method, if the CRC decoder detects error within the received packet, MS transmits soft decision symbol which is obtained from the decoded data in second step. As a result, the transmit diversity gain always can be obtained. From the computer simulation, we show that the proposed method can achieve the better error rate performance than the conventional one.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E90-A No.11 pp.2404-2412

Publication Date: 2007/11/01

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Online ISSN: 1745-1337

DOI: 10.1093/ietfec/e90-a.11.2404

Type of Manuscript: Special Section PAPER (Special Section on Wideband Systems)

Category: OFDM/Relay

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Yuki FUKUYAMA, Osamu TAKYU, Koichi ADACHI, Masao NAKAGAWA, "Relay Method of Sending Soft Decision Symbol Based on the Result of Error Detecting Code in Cooperative Communication" in IEICE TRANSACTIONS on Fundamentals, vol. E90-A, no. 11, pp. 2404-2412, November 2007, doi: 10.1093/ietfec/e90-a.11.2404.
Abstract: Transmit diversity gain can be obtained in cooperative communication by cooperating the multiple users with single antenna. In cooperative communication, in the first step, each mobile station (MS) transmits its own data to both the base station (BS) and the other MS. In the second step, each MS's data is transmitted from the other MS to BS. As a result, transmit diversity gain can be obtained without implementing multiple transmit antennas at MS. In the conventional relay method, if error is detected within the received packet by using cyclic redundancy check (CRC) code, MS transmits its own data to BS instead of relaying the other MS's data in the second step. As a result, transmit diversity gain cannot be obtained. In this paper, we propose a novel cooperative method. In the proposed method, if the CRC decoder detects error within the received packet, MS transmits soft decision symbol which is obtained from the decoded data in second step. As a result, the transmit diversity gain always can be obtained. From the computer simulation, we show that the proposed method can achieve the better error rate performance than the conventional one.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1093/ietfec/e90-a.11.2404/_p

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@ARTICLE{e90-a_11_2404,
author={Yuki FUKUYAMA, Osamu TAKYU, Koichi ADACHI, Masao NAKAGAWA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Relay Method of Sending Soft Decision Symbol Based on the Result of Error Detecting Code in Cooperative Communication},
year={2007},
volume={E90-A},
number={11},
pages={2404-2412},
abstract={Transmit diversity gain can be obtained in cooperative communication by cooperating the multiple users with single antenna. In cooperative communication, in the first step, each mobile station (MS) transmits its own data to both the base station (BS) and the other MS. In the second step, each MS's data is transmitted from the other MS to BS. As a result, transmit diversity gain can be obtained without implementing multiple transmit antennas at MS. In the conventional relay method, if error is detected within the received packet by using cyclic redundancy check (CRC) code, MS transmits its own data to BS instead of relaying the other MS's data in the second step. As a result, transmit diversity gain cannot be obtained. In this paper, we propose a novel cooperative method. In the proposed method, if the CRC decoder detects error within the received packet, MS transmits soft decision symbol which is obtained from the decoded data in second step. As a result, the transmit diversity gain always can be obtained. From the computer simulation, we show that the proposed method can achieve the better error rate performance than the conventional one.},
keywords={},
doi={10.1093/ietfec/e90-a.11.2404},
ISSN={1745-1337},
month={November},}

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TY - JOUR
TI - Relay Method of Sending Soft Decision Symbol Based on the Result of Error Detecting Code in Cooperative Communication
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2404
EP - 2412
AU - Yuki FUKUYAMA
AU - Osamu TAKYU
AU - Koichi ADACHI
AU - Masao NAKAGAWA
PY - 2007
DO - 10.1093/ietfec/e90-a.11.2404
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E90-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2007
AB - Transmit diversity gain can be obtained in cooperative communication by cooperating the multiple users with single antenna. In cooperative communication, in the first step, each mobile station (MS) transmits its own data to both the base station (BS) and the other MS. In the second step, each MS's data is transmitted from the other MS to BS. As a result, transmit diversity gain can be obtained without implementing multiple transmit antennas at MS. In the conventional relay method, if error is detected within the received packet by using cyclic redundancy check (CRC) code, MS transmits its own data to BS instead of relaying the other MS's data in the second step. As a result, transmit diversity gain cannot be obtained. In this paper, we propose a novel cooperative method. In the proposed method, if the CRC decoder detects error within the received packet, MS transmits soft decision symbol which is obtained from the decoded data in second step. As a result, the transmit diversity gain always can be obtained. From the computer simulation, we show that the proposed method can achieve the better error rate performance than the conventional one.
ER -