Title:
ディジタル伝送装置の受信機のための状態削減シーケンス推定法によるイコライザ
Document Type and Number:
Japanese Patent JP4555403
Kind Code:
B2
Abstract:
PCT No. PCT/IB97/00361 Sec. 371 Date Nov. 26, 1997 Sec. 102(e) Date Nov. 26, 1997 PCT Filed Apr. 7, 1997 PCT Pub. No. WO97/39550 PCT Pub. Date Oct. 23, 1997The invention relates to a digital transmission system having a receiver which includes an equalizer for estimating transmitted binary symbols, from a sequence of sample values (6) of a received signal distorted by a transmission channel, by a reduced-state sequence estimation method or a reduced-state single symbol estimation method (11). To provide a receiver featuring high reliability combined with a clear state reduction of the estimation method, a minimum-phase substitute system (14) distorts the sample values received after received after a known training sequence (27) in the sequence of sample values (6)in the received order, and a maximum-phase substitute system (14) distorts the sample values (6) received before a known training sequence (27) and to be processed in reverse order for forming an estimate (11) for a received signal. The number coefficients of the impulse response which are reduced by the state reduction and used for the estimation, render the estimation inaccurate. In a minimum-phase system, the first coefficients of the impulse response of the substitute system have maximum energy with an unchanged frequency response. When these coefficients transformed in this manner are used for the state reduction, nearly all of the information is used for the estimation. This achieves a high reliability of the sequence estimation as is achieved when all the states are used.
Inventors:
Raimund Meier
Robert fisher
Wolfgang Gerstadter
Johannes Hoover
Peter Schlum
Robert fisher
Wolfgang Gerstadter
Johannes Hoover
Peter Schlum
Application Number:
JP53690297A
Publication Date:
September 29, 2010
Filing Date:
April 07, 1997
Export Citation:
Assignee:
NXP B.V.
International Classes:
H04B1/76; H04L25/03; H04B7/005
Domestic Patent References:
| JP837479A | ||||
| JP6196968A | ||||
| JP6216707A | ||||
| JP3205926A | ||||
| JP5327785A |
Foreign References:
| WO1995008889A1 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Kimihiro Hoshi
Hiroyasu Ninomiya
Einzel Felix-Reinhard
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Kimihiro Hoshi
Hiroyasu Ninomiya
Einzel Felix-Reinhard