Receiver for discrete multitone modulated signals having...

Details Receiver for discrete multitone modulated signals having... Receiver for discrete multitone modulated signals having...

2006-04-04

2006-04-04

Tran, Khai (Department: 2637)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S260000, C375S232000, C375S222000, C708S300000, C708S323000

Reexamination Certificate

active

07023938

ABSTRACT:
A receiver for improving the performance of conventional Discrete Multitone Modulation (DMT) based Asymmetric Digital Subscriber Line (ADSL) modems, in the presence of noise and/or interference. A demodulator having an FFT followed by a single-tap-per-bin frequency-domain equalizer is augmented by an additional data-path utilizing windowing or pulse shaping. Windowing is done independently for each symbol over the orthogonality interval and efficiently in the time domain or frequency domain. A decision feedback equalizer at the output of the windowed data-path cancels inter-bin-interference created by windowing.

REFERENCES:
patent: 5903608 (1999-05-01), Chun
patent: 6047025 (2000-04-01), Johnson et al.
patent: 6353629 (2002-03-01), Pal
patent: 6396886 (2002-05-01), Kapoor
patent: 6459744 (2002-10-01), Helard et al.
Seong-Jo Na et al.; Design and implementation for 125mW/MIPS ultra-high speed asymmetric digital subscriber line transceiver chip; The First IEEE Asia Pacific Conference on, 1999 pp 21-24.

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