Title :
Joint Adaptive Modulation and MIMO Transmission for Non-Ideal OFDMA Cellular Systems
Author :
Morales-Jiménez, D. ; Gómez, G. ; Paris, J.F. ; Entrambasaguas, J.T.
Author_Institution :
Dept. of Commun. Eng., Univ. of Malaga, Malaga, Spain
fDate :
Nov. 30 2009-Dec. 4 2009
Abstract :
In this paper, a joint adaptive modulation and multiple-input multiple-output (MIMO) transmission scheme is considered. An efficient use of radio resources shall be based on channel state information at the transmitter (CSIT) to adjust the modulation order and MIMO transmission mode. A new suboptimal algorithm is proposed for link adaptation in a MIMO-OFDMA cellular system under spatially correlated fading and imperfect CSIT due to user mobility. Performance results are provided for the proposed solution under a long term evolution (LTE) downlink scenario. A substantial spectral efficiency gain is observed in contrast to the standalone transmission schemes.
Keywords :
MIMO communication; OFDM modulation; adaptive modulation; cellular radio; frequency division multiple access; LTE downlink; MIMO transmission scheme; adaptive modulation scheme; channel state information-at-the-transmitter; long term evolution downlink; modulation order; multiple-input multiple-output transmission; nonideal OFDMA cellular systems; orthogonal frequency division multiple access; suboptimal algorithm; substantial spectral efficiency gain; Bit error rate; Downlink; Frequency conversion; MIMO; Matrix decomposition; OFDM modulation; Quality of service; Receiving antennas; Transmitting antennas; Vectors;
Conference_Titel :
GLOBECOM Workshops, 2009 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-5626-0
Electronic_ISBN :
978-1-4244-5625-3
DOI :
10.1109/GLOCOMW.2009.5360728
