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
fDate :
3/1/2007 12:00:00 AM
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;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.061755
