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:
Feb. 17, 1998
Filed:
Nov. 08, 1996
Toshihito Kanai, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A mobile communication system includes an antenna, a first radio transmission/reception unit, a propagation loss calculating section, an antenna gain calculating section, an antenna gain selecting section, and a first weight control circuit. The antenna has a variable directivity pattern. The first radio transmission/reception unit transmits/receives communication information to/from a distant station through a communication channel by using the antenna. The propagation loss calculating section calculates a propagation loss in a radio channel including a communication channel between the antenna and the distant station. The antenna gain calculating section calculates a minimum antenna gain value required for communication under the condition of the propagation loss calculated by the propagation loss calculating section. The antenna gain selecting section selects an antenna gain not less than the minimum antenna gain value calculated by the antenna gain calculating section. The first weight control circuit controls the directivity pattern of the antenna in a communication state on the basis of the antenna gain selected by the antenna gain selecting section.