Improved DMT systems with multiple time domain equalization
Yan Dan-gui · Journal of Chongqing University. English Edition · 2010
DFT(discrete fourier transform)based discrete multi-tone(DMT) transceivers have achieved great success in high speed data transmission.When the cyclic prefix is no shorter than the channel impulse response(CIR),the DMT system is ISI(inter-symbol interference) free.For the channels with very long CIR,such as DSL loops,time-domain equalizer(TEQ) is typically added at the receiver to shorten the impulse response and improve performance.This paper proposes a filter banks approach to design the TEQ to maximize the bit rate.A DMT system is introduced with a pair of complex conjugating TEQs.For the design and implementation costs,the scheme shows the best performance-price-ratio.