Bonfring International Journal of Research in Communication Engineering

Online ISSN: 2277-5080 | Print ISSN: 2250-110X | Frequency: 4 Issues/Year

Impact Factor: 0.528 | International Scientific Indexing(ISI) calculate based on International Citation Report(ICR)

Power Reduction in Coded OFDM

K. Shoukath Ali, Dr.J. Ramesh and Dr.K. Gunavathi

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Abstract:

In this paper coded diversity schemes over block fading channels are considered. The performance of radio communication systems over fading channels is commonly improved by using diversity techniques; we consider an adaptive modulation and coding scheme for bit-interleaved coded Modulation. Adaptive modulation is most effective when the channel diversity orders are small (L=3-5). Two adaptation algorithms are proposed for improving the power efficiency of coded orthogonal frequency division multiplexing (OFDM) on fading channels. A bit-loading technique for maximizing the throughput at a fixed bit error probability is described. A power loading technique for minimizing the bit error probability at a fixed rate with minimal transmitter power is also discussed.

Keywords: Power Efficiency, Orthogonal Frequency Division Multiplexing (OFDM), Bit Interleaved Coded Modulation (BICM), Adaptive Modulation and Coding (AMC)

Volume: 2 | Issue: Special Issue on Communication Technology Interventions for Rural and Social Development

Pages: 38-42

Issue Date: February , 2012