The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1996
Filed:
Jun. 02, 1994
Yang-seok Choi, Kyungki-do, KR;
Samsung Electronics Co., Ltd., Kyungki-Do, KR;
Abstract
A method for adaptively turning on or off a decision directed algorithm (DDA) is performed according to the convergence state of the data to be equalized in a blind equalization system for use in a digital communication receiver. Each quadrant of a two-dimensional plane having an I-axis and Q-axis is divided into two decision areas. Then, a sign pair of actual error estimation data is calculated with respect to each area. If the decision error of the received symbol data is calculated, it is determined whether the sign of the decision error coincides with that of the actual error estimation data. The DDA is performed with respect to the symbol data of which the sign coincides with each other to update the equalization coefficient. The method further reduces the number of decision areas for dividing the plane formed by the I-axis and Q-axis in which the symbol data is arranged, to permit faster convergence speed and to further suppress the ratio of the symbol error.