Title :
Time-domain channel equalizer design using the inverse power method
Author :
Chiu, Wei-min ; Tsai, Wei Kang ; Liau, Thomas C. ; Troulis, Markos
Author_Institution :
California Univ., Irvine, CA, USA
Abstract :
The discrete multitone (DMT) modulation is the transmission scheme of choice in ADSL. DMT works on the condition that the standardized length-32 cyclic prefix guard band is longer than the channel for the purpose of orthogonalizing the sub-bands. Time-domain equalizers (TEQ) have been designed for the DMT receiver to shorten the physical channel response. This paper expands on a proposed TEQ scheme by reformulating its optimization problem to avoid matrix decompositions or inversions, and by devising a numerically sound solution using the inverse power method. Simulation results show the reformulated solution to be near-optimal
Keywords :
data communication; digital subscriber lines; equalisers; inverse problems; numerical analysis; optimisation; quadrature amplitude modulation; time-domain synthesis; ADSL; DMT modulation; DMT receiver; QAM sub-channels; TEQ scheme; channel response; data transmission; discrete multitone modulation; inverse power method; near-optimal solution; optimization problem; simulation results; standardized length-32 cyclic prefix guard band; sub-band orthogonalization; time-domain channel equalizer design; Convolution; Data communication; Discrete Fourier transforms; Equalizers; Interference; Matrix decomposition; OFDM modulation; Optimization methods; Quadrature amplitude modulation; Time domain analysis;
Conference_Titel :
Communications, 1999. ICC '99. 1999 IEEE International Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-5284-X
DOI :
10.1109/ICC.1999.765418
