NDLI: Shared power allocation among subcarriers of OFDM systems

Content Provider	IEEE Xplore Digital Library
Author	Dwivedi, V.K. Tripathi, S. Tripathi, V.S. Tripathi, R. Tiwari, S.
Copyright Year	2009
Description	Author affiliation: Electronics and Communication Engineering Department, MNNIT, Allahabad, India (Dwivedi, V.K.; Tripathi, S.; Tripathi, V.S.; Tripathi, R.; Tiwari, S.)
Abstract	Orthogonal frequency division multiplexing (OFDM) has several properties which make it an attractive modulation scheme for high speed wireless transmission links. In this paper, a novel power sharing technique is proposed for different users to improve the system performance. The proposed technique is based on use of variable amplitude of subcarriers (VAS). Power can be increased to the users who are crossing the reference boundary (RB) and moving farther towards foot print (FP) of a cell. In this way the users having weak SNR can sustain their call even in multipath fading environment. Assuming knowledge of the instantaneous channel gain estimation for all users, we propose an OFDM dynamic adaptive subcarriers scheme to maintain optimum SNR level of the subchannels which are in deep fade. Simulation results show that the performance of the proposed algorithm is much better than that of other algorithms.
Starting Page	266
Ending Page	269
File Size	395071
Page Count	4
File Format	PDF
ISBN	9781424448463
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-22
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Base stations OFDM Fading Channels Reference Boundary Power system modeling Foot Dynamic Adaptive Sub-Carrier Allocation System performance Intersymbol interference Foot Print OFDM modulation Optical modulation Modulation coding Power engineering and energy
Content Type	Text
Resource Type	Article

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