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학술지 Link Adaptation Considering Mobility in OFDMA Systems with Multiple Transmit Antennas
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저자
이승준
발행일
200807
출처
IEEE Communications Letters, v.12 no.7, pp.493-495
ISSN
1089-7798
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LCOMM.2008.080341
초록
Link adaptation is investigated for OFDMA systems with multiple transmit antennas, where the transmission rate is adapted and where the subcarriers to be used and the multiple antenna transmission scheme to be applied are adaptively selected, according to instantaneous SNR and user mobility. The throughputs (defined as the transmission rate multiplied by 1-(outage probability)) of several transmission modes, which are differentiated by their use of subcarriers and multiple antennas, are compared. Numerical examples are presented showing that the best transmission mode depends on the instantaneous SNR, user mobility (or time-correlation of channel), and a rate adaptation scheme. © 2008 IEEE.
키워드
Link adaptation, Mobility, Multiple transmit antennas, OFDMA
KSP 제안 키워드
Adaptation Scheme, Instantaneous SNR, Link Adaptation(LA), Numerical examples, OFDMA systems, Outage probability(OP), Rate adaptation, Time-correlation, Transmission Rate, Transmission mode, Transmission scheme