Method and apparatus for training linear equalizers in a PCM mod

Details Method and apparatus for training linear equalizers in a PCM mod Method and apparatus for training linear equalizers in a PCM mod

1998-12-17

1999-09-07

Pham, Chi H.

Pulse or digital communications

Transceivers

Modems

375231, H04B 138

Patent

active

059498196

ABSTRACT:
A pulse code modulation (PCM) modem system employs a relatively white training signal to optimize the adaptive filter coefficients in the receiver equalizers. During the training mode, any line coding or equivalent spectral shaping is disabled to provide a training signal sequence having a substantially even spectral content. The presence of DC within the training signal reduces the likelihood that the error function of the equalizers will settle at a local minimum. Following the training interval, the encoder enables the line coder to condition the digital input sequences, introduce DC nulls, and reduce the detrimental effects of baseline wander.

REFERENCES:
patent: 4489416 (1984-12-01), Stuart
patent: 4995057 (1991-02-01), Chung
patent: 5463661 (1995-10-01), Morann, II et al.
patent: 5661718 (1997-08-01), Bremer et al.
patent: 5666378 (1997-09-01), Marchetto et al.
patent: 5677951 (1997-10-01), Gay
patent: 5694423 (1997-12-01), Larsson et al.
patent: 5706344 (1998-01-01), Finn
patent: 5721772 (1998-02-01), Haneda et al.
patent: 5732112 (1998-03-01), Langberg
patent: 5737389 (1998-04-01), Allen
patent: 5737410 (1998-04-01), Vahatalo et al.
patent: 5740242 (1998-04-01), Hayashi
patent: 5761088 (1998-06-01), Hulyalkar et al.
patent: 5764694 (1998-06-01), Rahamim
patent: 5809075 (1999-04-01), Townshend

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