Title:
【発明の名称】被劣化信号を受信機内で等価にする装置および方法
Document Type and Number:
Japanese Patent JPH06506324
Kind Code:
A
Abstract:
An equalization system for equalizing a corrupted signal is disclosed. The equalization system includes a complex matched filter (400) and a maximum likelihood sequence estimator (MLSE) (405) for removing the effects of phase shift, amplitude variations, intersymbol interference, etc. resulting from multi-pathing and noise contributed by the receiver front end. The system estimates a correlation signal C(t) (505) and synchronizes C(t) 505 to maximize its energy as seen on the taps of the complex matched filter (400). Taps having amplitude coefficients below a predetermined threshold are set to zero to produce a modified CIR estimate. The modified CIR estimate which has had the effects of noise virtually eliminated, is then used to construct the complex matched filter (400) and is also used as input to the MLSE (405) to produce a better equalized data signal.
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Inventors:
Labez, Gerald Pea
Kotzin, Michael Dee
Schuler, Joseph Jay
The Orco Eric F
Kotzin, Michael Dee
Schuler, Joseph Jay
The Orco Eric F
Application Number:
JP50336292A
Publication Date:
July 14, 1994
Filing Date:
December 17, 1991
Export Citation:
Assignee:
MOTOROLA INCORPORATED
International Classes:
H04B1/10; H04B7/005; H04L25/02; H04L25/03; H04L25/30; H04L27/01; H04L27/38; (IPC1-7): H04B1/10; H04B7/005
Attorney, Agent or Firm:
Masanori Honjo (1 person outside)