Multi-tone transmission

Details Multi-tone transmission Multi-tone transmission

2006-07-11

2006-07-11

Tse, Young T. (Department: 2637)

Pulse or digital communications

Transceivers

Modems

C375S260000, C370S210000

Reexamination Certificate

active

07075978

ABSTRACT:
A Multi-tone transmission system processes input data through a plurality of intermediate processing stages12, 14, 16and corresponding stages of intermediate data18, 20. A symbol including a number of tones is obtained therefrom by an inverse Fourier transform24and stored in a buffer158. The peak amplitude contained in the symbol is detected28and compared with a threshold. If the peak amplitude in the symbol exceeds the threshold, the symbol stored in the buffer158is regenerated.

REFERENCES:
patent: 4045616 (1977-08-01), Sloane
patent: 4679227 (1987-07-01), Hughes-Hartogs
patent: 5768318 (1998-06-01), Mestgagh
patent: 6038261 (2000-03-01), Mestdagh
patent: 6130918 (2000-10-01), Humphrey et al.
patent: 6845082 (2005-01-01), Bourget et al.
patent: WO 99/18662 (1999-04-01), None
“Low-Power ADSL Central-Office Line Driver.” Texas Instruments, Dallas, Texas, Apr. 1999—Revised May 2001, pp. 1-31.

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