TY - JOUR
T1 - Signal-carrier cooperative DF relay using adaptive modulation
AU - Kimura, Kazuhiro
AU - Miyazaki, Hiroyuki
AU - Obara, Tatsunori
AU - Adachi, Fumiyuki
PY - 2014
Y1 - 2014
N2 - 2-time slot cooperative relay can be used to increase the cell-edge throughput. Adaptive data modulation further improves the throughput. In this paper, we introduce adaptive modulation to singlecarrier (SC) cooperative decode-and-forward (DF) relay. The best modulation combination for mobile-terminal (MT)-relay station (RS) and RS-base station (BS) links is determined for the given local average signal-to-noise power ratios (SNRs) of MT-BS, MT-RS and RS-BS links. According to the modulation combination, the ratio of time slot length of the MT-RS link (first time slot) and the RS-BS link (second time slot) is changed. It is shown by computer simulation that the use of adaptive modulation can achieve higher throughput than fixed modulation and reduces by about 9 dB the required normalized total transmit SNR for a 10%-outage throughput of 0.8 bps/Hz compared to direct transmission.
AB - 2-time slot cooperative relay can be used to increase the cell-edge throughput. Adaptive data modulation further improves the throughput. In this paper, we introduce adaptive modulation to singlecarrier (SC) cooperative decode-and-forward (DF) relay. The best modulation combination for mobile-terminal (MT)-relay station (RS) and RS-base station (BS) links is determined for the given local average signal-to-noise power ratios (SNRs) of MT-BS, MT-RS and RS-BS links. According to the modulation combination, the ratio of time slot length of the MT-RS link (first time slot) and the RS-BS link (second time slot) is changed. It is shown by computer simulation that the use of adaptive modulation can achieve higher throughput than fixed modulation and reduces by about 9 dB the required normalized total transmit SNR for a 10%-outage throughput of 0.8 bps/Hz compared to direct transmission.
KW - Adaptive modulation
KW - Cooperative decode-and-forward (DF) relay
KW - Single-carrier transmission
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U2 - 10.1587/transcom.E97.B.387
DO - 10.1587/transcom.E97.B.387
M3 - Article
AN - SCOPUS:84893325937
SN - 0916-8516
VL - E97-B
SP - 387
EP - 395
JO - IEICE Transactions on Communications
JF - IEICE Transactions on Communications
IS - 2
ER -