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    초록·키워드

    This paper presents a method of the performance improvement for 16QAM-TCM in the frequency selective Rayleigh fading channel. The proposed system has a high spectral efficiency and high transmission quality in frequency selective Rayleigh fading channel. In fading compensation, we use multi-pilot symbols that compensates for a maximum delay time of up to one symbol duration. In order to improve the BER performance, we use 3/4 Trellis coded modulation scheme of 16QAM and use the bit reversal block interleaver which can randomize burst errors. Results show that significant improvements in the BER performance can be obtained by the proposed techniques. selective fading compensation technique that compensates for a maximum delay time of up to one symbol duration. It is based on two-ray fading channel model. We use three pilot symbols located at the beginning of each frame, estimate a channel characteristics with two different factors, and compensate for fading. Also, in order to improve the BER performance, we use 3/4 Trellis coded modulation scheme that provide coding gain without bandwidth expansion, and use the bit reversal block interleaver which can randomize burst errors. Results show that significant improvements in the BER performance can be obtained by the proposed techniques. We show that this method is useful in frequency selective Rayleigh fading by computer simulation.

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      UCI(KEPA) : I410-ECN-0101-2009-569-013222767