Title :
A Non-Uniform DMT Transceiver for Noise Reduction in Zero Forcing Equalization
Author :
Baig, Sobia ; Mughal, M.J.
Author_Institution :
Fac. of Electron. Eng., GIK Inst. of Eng. Sci. & Technol., Swabi
Abstract :
Zero-forcing is a linear equalization technique, with the advantages of simplicity and computational efficiency, and the disadvantage that it can amplify noise in a communication channel. In this paper, we analyze the performance of a nonuniform discrete multitone (DMT) transceiver, having a Daubechies wavelet filter bank transmultiplexer used to reduce the increase in channel-noise. It is shown that for a non-ideal channel, the transceiver´s bit error rate (BER) can significantly deteriorate due to inter-channel crosstalk. We also propose a modification by reducing the symbol rate in the sub-band having the maximum number of channel samples of lower magnitude. Matlab simulations using digital subscriber line (DSL) channel show improvement in BER performance of the ideal non-uniform DMT in comparison with a conventional DMTsystem
Keywords :
error statistics; transceivers; wavelet transforms; wireless channels; DMT transceiver; Daubechies wavelet filter bank transmultiplexer; bit error rate; communication channel; digital subscriber line channel; interchannel crosstalk; linear equalization technique; noise reduction; nonuniform discrete multitone; zero forcing equalization; Bit error rate; Communication channels; Computational efficiency; Crosstalk; DSL; Noise reduction; OFDM modulation; Performance analysis; Transceivers; Wavelet analysis;
Conference_Titel :
Emerging Technologies, 2006. ICET '06. International Conference on
Conference_Location :
Peshawar
Print_ISBN :
1-4244-0503-3
Electronic_ISBN :
1-4244-0503-3
DOI :
10.1109/ICET.2006.336018
