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. 30, 2013
Filed:
Apr. 30, 2012
Yasuaki Yuda, Kanagawa, JP;
Takaaki Kishigami, Tokyo, JP;
Takashi Fukagawa, Kanagawa, JP;
Yoichi Nakagawa, Tokyo, JP;
Shinichiro Takabayashi, Tokyo, JP;
Yasuaki Yuda, Kanagawa, JP;
Takaaki Kishigami, Tokyo, JP;
Takashi Fukagawa, Kanagawa, JP;
Yoichi Nakagawa, Tokyo, JP;
Shinichiro Takabayashi, Tokyo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Wireless communication apparatus adopting a time division duplex system for transmission and reception using plural antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means detects channel information based on reception output of N reception circuits having a one-to-one correspondence with N antennas. Correction value detection means finds a correction value for correcting deviation occurring between each of N transmission circuits and each of the N reception circuits based on the channel information. A wireless communication apparatus transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means of the wireless communication apparatus detects the correction value using the correction signal.