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Transmit Power and Bit Allocations for OFDM Systems in a Fading Channel

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Authors
Jang, Jiho; Lee, Kwang Bok; Lee, Yong-Hwan
Issue Date
2003-12
Citation
GLOBECOM '03. IEEE Global Telecommunications Conference, vol. 2, pp. 858-862, 2003
Keywords
power allocationbit allocation
Abstract
In this paper, we propose a computationally
efficient algorithm for transmit power and bit allocations in wireless OFDM systems aiming at maximization of data rate under the constraint of total transmit power and bit error rate. Although the proposed algorithm is based on the water-filling
approach, the computational complexity is only O(k ×M) ,where k denotes the number of iterations required to meet the constraints and M is the number of subchannels. By computer simulations, we verify that 10 iterations are sufficient to satisfy the constraints, and the decrease of data rate for the proposed algorithm is shown to be less than one percent relative to the optimal method at the average SNR above 4dB.
The proposed algorithm is appropriate for OFDM systems in a time varying wireless channel for its low computational
complexity and good performance.
Language
English
URI
http://www.globecom2003.com/

http://hdl.handle.net/10371/7566
DOI
https://doi.org/10.1109/GLOCOM.2003.1258361
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Others_전기·정보공학부
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