发明名称 |
Equalizer for the correction of digital signals |
摘要 |
An equalizer designed to correct both precursor and postcursor distortion in signal samples periodically obtained from a digital signal train comprises two parallel, mutually complementary circuit branches each including an upstream filter for linearly correcting one type of distortion and a downstream cell for nonlinearly compensating the other type of distortion. The compensating cell of the first branch includes an adder algebraically combining a feed-forward signal with a signal at least partly freed from postcursor interference in the corresponding upstream filter; the second branch includes another adder algebraically combining a feedback signal from its compensating cell with a prefiltered signal at least partly freed from precursor interference. Purged signals from both adders are combined in a summing stage followed by a decision unit which emits a quantized pulse to be used either directly as a decided symbol or as a source of corrective pulses for postcursor and precursor elimination in another linearly prefiltered sample.
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申请公布号 |
US4288872(A) |
申请公布日期 |
1981.09.08 |
申请号 |
US19800148237 |
申请日期 |
1980.05.09 |
申请人 |
CSELT - CENTRO STUDI E LABORATORI TELECOMUNICAZIONI S.P.A. |
发明人 |
TAMBURELLI, GIOVANNI |
分类号 |
H04L25/03;(IPC1-7):H03K5/15;H04B3/04 |
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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