Title:
DEMODULATOR
Document Type and Number:
Japanese Patent JP2795053
Kind Code:
B2
Abstract:
PURPOSE: To provide an automatic equalizer capable of equalizing inter-code interference due to fading more efficiently in a demodulator for digital radio communication.
CONSTITUTION: The system employing the demodulator is provided with an IF band transversal filter forward equalizer 61 receiving an intermediate frequency band modulation signal to equalize the lead component of inter-code interference, the demodulator 102 detecting the output of an IF band transversal filter type forward equalizer 61, extracting a base band signal, sampling and quantizing the signal, a base band full digital discrimination feedback backward equalizer 62 receiving a digital signal string being the output of the modulator and equalizing the delay component of inter-code interference, a 1st control signal generating circuit 63 outputting a tap coefficient to the IF band transversal filter type forward equalizer 61, and a 2nd control signal generating circuit 64 outputting a tap coefficient to the base band full digital deciding feedback backward equalizer 62.
Inventors:
MIZOGUCHI SHOICHI
Application Number:
JP13122192A
Publication Date:
September 10, 1998
Filing Date:
May 25, 1992
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
H03H15/00; H03H17/00; H03H17/02; H03H21/00; H04B3/06; H04B7/005; H04L25/03; H04L27/01; (IPC1-7): H04B7/005; H03H15/00; H03H17/02; H04L27/01
Domestic Patent References:
| JP62179229A | ||||
| JP1205631A |
Other References:
１９９１年電子情報通信学会春季全国大会講演論文集、〔分冊２〕、（１９９１−３−１５） Ｐ．２・４２８
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)