TY - GEN
T1 - Adaptive channel assignment and pilot-less channel tracking method for OFDMA systems
AU - Sakamoto, Kazumitsu
AU - Muta, Osamu
AU - Akaiwa, Yoshihiko
AU - Giridhar, K.
AU - Furukawa, Hiroshi
PY - 2010/12/1
Y1 - 2010/12/1
N2 - OFDMA (Orthogonal frequency division multiple access) based systems have been considered as a candidate for future wireless communication systems. In such a system, it is important to provide high data rate services for users with high mobility. For this purpose, decision-directed channel tracking (DDCT) techniques have been investigated for OFDM systems in high mobility environments. The performance of the DDCT in OFDMA systems depends on the assigned channel condition, and therefore it is important to allocate a proper channel to each user. The purpose of this paper is to propose an adaptive channel assignment method which enhances the DDCT improvement in an OFDMA system, where the former numbered resource blocks (RBs) in OFDMA frame are preferentially allocated to the users moving at a high speed. Computer simulation results show that the proposed method is effective in improving throughput performance of OFDMA systems in a high Doppler frequency condition.
AB - OFDMA (Orthogonal frequency division multiple access) based systems have been considered as a candidate for future wireless communication systems. In such a system, it is important to provide high data rate services for users with high mobility. For this purpose, decision-directed channel tracking (DDCT) techniques have been investigated for OFDM systems in high mobility environments. The performance of the DDCT in OFDMA systems depends on the assigned channel condition, and therefore it is important to allocate a proper channel to each user. The purpose of this paper is to propose an adaptive channel assignment method which enhances the DDCT improvement in an OFDMA system, where the former numbered resource blocks (RBs) in OFDMA frame are preferentially allocated to the users moving at a high speed. Computer simulation results show that the proposed method is effective in improving throughput performance of OFDMA systems in a high Doppler frequency condition.
UR - http://www.scopus.com/inward/record.url?scp=79952499656&partnerID=8YFLogxK
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U2 - 10.1109/ICSPCS.2010.5709724
DO - 10.1109/ICSPCS.2010.5709724
M3 - Conference contribution
AN - SCOPUS:79952499656
SN - 9781424479078
T3 - 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Proceedings
BT - 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Proceedings
T2 - 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010
Y2 - 13 December 2010 through 15 December 2010
ER -