Title:
【発明の名称】自動等化器
Document Type and Number:
Japanese Patent JP3251023
Kind Code:
B2
Abstract:
An automatic equalizer includes an adaptive matched filter (302) connected in front of a decision feedback equalizer (301) of a conventional design. The adaptive matched filter has an A/D converter (12) for sampling and quantizing an analog baseband signal into a digital signal, which is applied to a transversal filter (103). The transversal filter is supplied with tap coefficients adaptively controlled by a control signal generator (104) which makes automatic adjustments to symmetrize the impulse response of a transmission path depending on the status of fading. The automatic equalizer can sufficiently equalize the fading in the range rho > 1 in which the reflected wave is stronger than the direct wave, which fading cannot be adequately equalized only by the conventional decision feedback equalizer (301).
Inventors:
Mizoguchi Shoichi
Application Number:
JP3254491A
Publication Date:
January 28, 2002
Filing Date:
February 27, 1991
Export Citation:
Assignee:
NEC
International Classes:
H03H15/00; H04B7/005; H03H17/00; H03H21/00; H04B3/04; H04L25/03; (IPC1-7): H04B7/005
Domestic Patent References:
| JP63119331A |
Other References:
１９８９年電子情報通信学会春季全国大会講演論文集［分冊２］第２−４３３頁；「Ｂ−９２９超多値ＱＡＭの新等化方式」
ＩＥＥＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｃｏｎｆｅｒｅｎｃｅ ｏｎ Ｃｏｍｍｕｎｉｃａｔｉｏｎｓ、第１４５５−１４５９頁；“ＡＤＡＰＴＩＶＥ ＭＡＴＣＨＥＤ ＦＩＬＴＥＲ ＡＮＤ ＩＴＳ ＳＩＧＮＩＦＩＣＡＮＣＥ ＴＯ ＡＮＴＩ−ＭＵＬＴＩＰＡＴＨ ＦＡＤＩＮＧ”
電子情報通信学会技術研究報告、信学技法Ｖｏｌ．７８，Ｎｏ．２５０；ＣＳ７８−１９６〜２０３、第５７−６４頁；「マルチパス伝送路における適応受信方式」
ＩＥＥＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｃｏｎｆｅｒｅｎｃｅ ｏｎ Ｃｏｍｍｕｎｉｃａｔｉｏｎｓ、第１４５５−１４５９頁；“ＡＤＡＰＴＩＶＥ ＭＡＴＣＨＥＤ ＦＩＬＴＥＲ ＡＮＤ ＩＴＳ ＳＩＧＮＩＦＩＣＡＮＣＥ ＴＯ ＡＮＴＩ−ＭＵＬＴＩＰＡＴＨ ＦＡＤＩＮＧ”
電子情報通信学会技術研究報告、信学技法Ｖｏｌ．７８，Ｎｏ．２５０；ＣＳ７８−１９６〜２０３、第５７−６４頁；「マルチパス伝送路における適応受信方式」
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)