发明名称 |
ECHOKOMPENSATIONSEINRICHTUNG MIT KORREKTUR VON PHASENABWEICHUNGEN. |
摘要 |
A multiplier (58) phase rotates a generated echo signal by a value X which is the estimated phase-roll value to provide a complex phase-roll connected signal. The error signal differenced between the incoming signal and the real component (112) of the corrected signal is then multipled (124) by the imaginary component (120) to provide a value Y. A phase variation estimator (128) determines the phase roll value Z in half-duplex mode, as well as in full-duplex mode, in response to this value Y. A phase filter (126) provides the estimated value X in response to the phase-roll value Z. Pref. the estimator (128) includes a third multiplier providing a value proportional to the value Y and a fourth multiplier multiplying the sign bits to provide a low-value estimate of the value Z.
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申请公布号 |
DE3784490(D1) |
申请公布日期 |
1993.04.08 |
申请号 |
DE19873784490 |
申请日期 |
1987.04.22 |
申请人 |
IBM |
发明人 |
BELLOC JACQUES;MORLEC EMILE;GODARD DOMINIQUE;QUINTIN MICHEL |
分类号 |
H04L5/14;H04B3/23;(IPC1-7):H04B3/23 |
主分类号 |
H04L5/14 |
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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