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Abstract
The Orthogonal Frequency Division Multiplexing (OFDM) technique has been used in Wireless Local Area Networks (WLANs) for combating the multipath distortion. The severe intersymbol interference (ISI) which results from the multipath distortion can be mitigated by simple scalar division operation when OFDM is used. However, in addition to the ISI mitigation capability, the use of OFDM enables us to adaptively load the various subcarriers used for communication. Adaptive loading can be done to optimize various system parameters which can result in benefits compared to uniform loading. We present the performance of adaptive loading schemes for WLANs based on the IEEE 802.11a standard. Simulation results illustrate the performance advantages of adaptive loading techniques in such systems.
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Notes on contributors
S Srikanth
Srikanth finished his MA Sc and PhD at the University of Victoria, Canada in 1999, He specializes in physical layer techniques for wireless communications. He has been with AU-KBC Research Centre for the past 4 years and he has been awarded a young scientist fellowship by the Govt of India.
V Paul Reuben
V Paul Reuben finished his BE at Anna University, Chennai. He was a research Engineer at AU-KBC for the past 3 years. Currently, he is pursuing his Master' sat NIT, Trichy.
Arun Pachai Kannu
Arun Pachai Kannu finished his BE at Anna University, Chennai, He worked as a research engineer at AU-KBC for 1 year. He is pursuing his Master's at Ohio State University.
Thiagarajan Sivanadyan
Thiagarajan Sivanadyan finished his BE at Anna University, Chennai. He worked as a research engineer at AU-KBC for 1 year. He has finished his Master's at University of Wisconsin and is pursuing his PhD.