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:
Sep. 15, 2009
Filed:
Apr. 15, 2005
Hiromasa Fujii, Yokosuka, JP;
Jiyun Shen, Yokohama, JP;
Takahiro Asai, Yokosuka, JP;
Hirohito Suda, Yokosuka, JP;
Hiromasa Fujii, Yokosuka, JP;
Jiyun Shen, Yokohama, JP;
Takahiro Asai, Yokosuka, JP;
Hirohito Suda, Yokosuka, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
A radio communication system including a transmitter and a receiver () for transmitting MIMO channel signals is provided. The transmitter comprises a pilot signal insertion controller () for inserting a pilot signal for channel estimation into at least a leading frame; and an information symbol controller for controlling the number of information symbols to be contained in a frame, based on the existence of the pilot signal. The receiver comprises a received signal replica generator () for generating received signal replicas based on previously obtained provisional channel estimation values and transmission signal estimation values; a canceller () for removing, from a received signal, received signal replicas of at least a part of streams that are not channel estimation target streams; and a channel estimation value generator () for generating channel estimation values by a filter using outputs from the removing unit and the transmission signal estimation values.