DocumentCode
746584
Title
An Optimum Subcarrier and Bit Allocation Period Based on Mobile Speed for OFDM Systems
Author
Kim, Seho ; Kim, Hyung-Myung
Author_Institution
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon
Volume
11
Issue
3
fYear
2007
fDate
3/1/2007 12:00:00 AM
Firstpage
249
Lastpage
251
Abstract
A subcarrier and bit allocation period (SBAP) is proposed based on the mobile speed for OFDM systems. It is assumed that users have different SBAPs according to their mobile speeds. The overhead is considered while transmitting the subcarrier and bit assignment information (SBAI). The optimum SBAP of each user is determined such that the overall throughput including SBAI can be maximized. Simulation results show that the proposed scheme outperforms other schemes. It is also demonstrated that the proposed scheme is insensitive to an error in the estimation of mobile speeds
Keywords
OFDM modulation; channel allocation; mobile communication; OFDM system; SBAI; SBAP; mobile speed; orthogonal frequency division multiplexing; subcarrier-bit allocation period; subcarrier-bit assignment information; Bandwidth; Base stations; Bit rate; Diversity methods; Downlink; Estimation error; Fading; OFDM; Throughput; Wireless communication;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/LCOMM.2007.061755
Filename
4133912
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