InvestorsHub Logo
Followers 37
Posts 9566
Boards Moderated 0
Alias Born 01/02/2003

Re: Gamco post# 1588

Tuesday, 03/02/2010 8:54:43 AM

Tuesday, March 02, 2010 8:54:43 AM

Post# of 1707
United States Patent 7,672,360
Zeira March 2, 2010

--------------------------------------------------------------------------------
Channel estimation for time division duplex communication systems


Abstract
A plurality of communication bursts are used to communicate data in a shared spectrum in a time slot of a time division duplex communication system. Each burst has an associated midamble sequence of a set of known sequences. A wireless communication apparatus has a receiver component configured to receive the plurality of communication bursts and to define a received vector corresponding to the received bursts. A channel estimator is provided that is configured to estimate channel information of the plurality of communication bursts by constructing a block matrix having a plurality of identical right circulant matrix blocks using the known midamble sequences and the received vector. A data detector then recovers data from the received communication bursts using the estimated wireless channel information.


--------------------------------------------------------------------------------
Inventors: Zeira; Ariela (Huntington, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 12/346,985
Filed: December 31, 2008

--------------------------------------------------------------------------------

Related U.S. Patent Documents

--------------------------------------------------------------------------------

Application Number Filing Date Patent Number Issue Date
11865268 Jan., 2009 7474689
11491463 Oct., 2007 7280584
11217960 Sep., 2006 7103092
09755400 Jan., 2006 6985513
60175167 Jan., 2000


--------------------------------------------------------------------------------

Current U.S. Class: 375/147 ; 370/342
Current International Class: H04B 1/69 (20060101); H04B 7/216 (20060101)


Gamco

Join the InvestorsHub Community

Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.