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:
Jun. 10, 2003
Filed:
Oct. 12, 1999
Hisao Koga, Fukuoka, JP;
Makoto Taromaru, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The invention aims at adaptive array diversity reception of high convergence speed of combined weight by a simple signal processing, in a receiver by time division transmission system. Signals received by antennas (branches) are converted into base band signals in a receiving circuit, and are combined by a complex multiplying section and complex adder. The weight of the complex multiplying section is calculated by a weight calculating section. In the weight update algorithm of the weight calculating section, the step size in the least mean square is variable. That is, the initial value is set at a large value, and is decreased according to the lapse of time in each time slot, and is initialized at every change of time slot. As a result, by the same amount of calculation as in ordinary least mean square, the convergence speed of weight updating can be enhanced.