发明名称 |
Method and apparatus for training linear equalizers in a PCM modem |
摘要 |
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.
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申请公布号 |
US5914982(A) |
申请公布日期 |
1999.06.22 |
申请号 |
US19970874316 |
申请日期 |
1997.06.13 |
申请人 |
ROCKWELL SEMICONDUCTOR SYSTEMS, INC. |
发明人 |
BJARNASON, ELIAS;JONSSON, OLAFUR;OLAFSSON, SVERRIR |
分类号 |
H04L25/03;H04L25/49;(IPC1-7):H04B1/38;H04L5/16 |
主分类号 |
H04L25/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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