Title:
【発明の名称】等化器
Document Type and Number:
Japanese Patent JP3038790
Kind Code:
B2
Abstract:
Disclosed is a hardware arrangement for equalizing waveform distortion caused by multipath fading in a digital radio communications system, which hardware arrangement uses a recursive least-squares algorithm into which a forgetting factor is introduced. An incoming signal (PSK signal for example) is applied to an automatic gain controller which generates a first signal whose value varies with a signal-to-noise ratio of the incoming signal. A forgetting factor controller is coupled to the automatic gain controller to receive the first signal and generates the forgetting factor the value of which varies with the value of the first signal. An adaptive equalizer receives the incoming signal and the forgetting factor. The adaptive equalizer equalizes the waveform distortion using the forgetting factor according to the recursive least-squares algorithm.
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Inventors:
Tomoki Ohsawa
Application Number:
JP11458390A
Publication Date:
May 08, 2000
Filing Date:
April 27, 1990
Export Citation:
Assignee:
NEC
International Classes:
H03H21/00; H03H15/00; H03H17/00; H04B3/14; H04B7/005; H04L25/03; (IPC1-7): H04B3/06
Domestic Patent References:
| JP3107208A |
Other References:
【文献】石川,鈴木「移動通信用RLS等化器の最適忘却係数(B-514)」1989年電子情報通信学会秋季全国大会講演論文集,分冊2,(1989)P.2・184
Attorney, Agent or Firm:
Nobuo Takahashi (3 outside)