Discrete multi-tone system having DHT-based frequency-domain...

Details Discrete multi-tone system having DHT-based frequency-domain... Discrete multi-tone system having DHT-based frequency-domain...

2006-02-24

2009-06-09

Vo, Don N (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S350000

Reexamination Certificate

active

07545871

ABSTRACT:
A discrete multi-tone (DMT) communication system is provided herein, replacing the conventional inversed discrete Fourier transform (IDFT) and DFT with IDHT (together with the complex-to-real transformation) and a DHT alone respectively at the transmitting end and the receiving end. A DHT-based frequency-domain equalizer (FEQ) at the receiving end equalizes each of the 0-th to (N−1)-th DHT subchannels, where N is the number of point of the DHT. Finally, each of the 0-th to(N2-1)-thsubchannels of the DMT system is obtained by combining the k-th and (N-k)-th subchannels of the DHT-based FEQ for k=0, 1, . . . ,(N2-1).

REFERENCES:
patent: 2006/0085497 (2006-04-01), Sehitoglu
patent: 2007/0064824 (2007-03-01), Wang et al.
patent: 2007/0263741 (2007-11-01), Erving et al.
patent: 2008/0037666 (2008-02-01), Tzannes

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