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Low Complexity Bit Loading Algorithm with Power-constraint for OFDM-based Wireless Sensor Communication  

Oh, Seoung-Youl (Department of Computer Science and Engineering, Pohang University of Science and Technology (POSTECH))
Ko, Hyeon-Mok (Department of Computer Science and Engineering, Pohang University of Science and Technology (POSTECH))
Kwon, Soon-Mok (Department of Computer Science and Engineering, Pohang University of Science and Technology (POSTECH))
Kim, Chee-Ha (Department of Computer Science and Engineering, Pohang University of Science and Technology (POSTECH))
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.12B, 2009 , pp. 1483-1490 More about this Journal
Abstract
Orthogonal frequency division multiplexing (OFDM) has been investigated as an enabling technology for future wireless communications such as ad hoc, mesh and sensor networks. However, prior works on bit-loading lack consideration of the constraints on energy and computing facility in sensor networks. In this paper, we suggest an adaptive bit allocation algorithm for a frequency selective fading channel environment which exploits channel state information obtained through a feedback channel. The proposed algorithm significantly reduces computational complexity and satisfies the power budget. Also, its throughput is comparable to the optimum solution. Simulation results support the claim stated.
Keywords
Adaptive bit loading; OFDM; Energy constraint in transmission; Wireless sensor network;
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