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Publication Type : Conference Paper
Publisher : Procedia Engineering
Source : Procedia Engineering, Volume 30, Coimbatore, p.1195-1204 (2012)
Keywords : Bandwidth efficiency, Channel equalization, Channel response, Channel variations, Coherence Time, Communication, Communication channels (information theory), Cyclic Prefix, Fading channels, Guard intervals, Impulse response, Input signal, MIMO systems, Multiple input multiple output, Narrow band interference, OFDM systems, Orthogonal frequency division multiplexing, Pre-distortion, Side lobes, Signal receivers, Slow fading channel, Symmetric channels, Systems analysis, Telecommunication systems, Transmitted signal, Transmitters, Wavelet Packet, WPMCM
Campus : Coimbatore
School : School of Engineering
Department : Electronics and Communication
Year : 2012
Abstract : In any communication system, the emphasis is on estimating the channel response so as to retrieve the transmitted input signal accurately at the receiver's end. Channel Equalization at the transmitter refers to pre-distorting the input signal so that the effect of the channel is nullified during transmission. In this article, we study the performance of Multiple Input Multiple Output (MIMO) wavelet packet multicarrier modulation (WPMCM) with a low complex pre-distortive type channel equalization technique at the transmitter which adapts to the channel variations. WPM offers much lower side lobes in transmitted signal, which reduce its sensitivity to ICI and narrowband interference. Due to time overlapping, WPMCM systems don't require cyclic prefix (CP) or guard interval (GI) thus enhancing the bandwidth efficiency compared to conventional OFDM systems. This approach works out for slow fading channels where the channel response remains almost constant for a considerable amount of time (coherence time).
Cite this Research Publication : Ra Deepa and Baskaran, Kb, “Low complex pre-distortion type adaptive channel equalization technique for slow-fading symmetric channels”, in Procedia Engineering, Coimbatore, 2012, vol. 30, pp. 1195-1204.