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EP0453201A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Control for adaptive equalizer

Assignee: Panasonic Holdings Corp
•
Filing: 1991-04-12
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Granted: —
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Expires: 2011-04-12
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Abstract

Abstract In a digital mobile communication system, a plurality delay elements (1 to 4) sequentially receive and delay data and a plurality of amplifiers (5 to 9) receive the data from the respective taps of the delay elements and weight them. An adder (10) adds the weighted signals from the amplifiers and a discriminator (11) provides a reference signal presumed based upon the added signal from the adder. An operation and updating device (13a, 14) operates the gain of at least one of the amplifiers by a sequential LMS method and updates the gain of the amplifier each time when.a data is inputted into the delay elements. As a result of this, a digital mobile communication system having a high transmission rate using the LMS method can be provided.

Inventors

  • 👤 Mitsuru Uesugi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 05:58
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/03; H04L25/03006; H04L25/03012; H04L25/03019; H04L25/03038; H03; H03H; H03H21/00; H03H21/0012

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 128 words
A control for an adaptive equalizer, characterized by comprising: a plurality of delay elements (1 to 4) to which data sequentially are inputted thereto for delaying the inputted data; a plurality of amplifiers (5 to 9) each for respectively weighting the data from each tap of said delay elements; an adder (10) for adding the output signals from said amplifiers; a discriminator (11) for presuming a reference signal in accordance with the output signal of said adder; and means for operating the gain of at least one of the amplifiers based upon the difference between the output signal of said adder and the reference signal presumed by said discriminator and for updating the gain of the amplifier each time when a data is inputted to said delay elements.
Claim 2
Dependent Claim 29 words
A control for an adaptive equalizer according to Claim 1 characterized in that the gains of the amplifiers (5 through 9) are operated by the Least Mean Square method.
Claim 3
Dependent Claim 26 words
A control for an adaptive equalizer according to Claim 1 or 2 characterized in that each of the delay elements (1 to 4) comprises a latch.
Claim 4
Dependent Claim 134 words
A control for an adaptive equalizer, for a digital mobile communication system characterized by comprising: a plurality of delay elements (1 to 4) to which data sequentially are inputted thereto for delaying the inputted data; a plurality of amplifiers (5 to 9) each for respectively weighting the data from each tap of said delay elements; an adder (10) for adding the output signals from said amplifiers; a discriminator (11) for presuming a reference signal in accordance with the output signal of said adder; and means for operating the gain of the amplifier based upon the difference between the output signal of said adder and the reference signal presumed by said discriminator by sequential LMS method and for updating the gain of the amplifier each time when a data is inputted to said delay elements.

References Cited (Backward Citations)

US3781720A Cited
US3868603A Cited
US3992616A Cited

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