InterDigital Inc (IDCC)

[Gamco]

United States Patent RE46,750
Sugar , et al. March 6, 2018

System and method for antenna diversity using equal power joint maximal ratio combining


Abstract

.[.An equal gain composite beamforming technique which includes the constraint that the power of the signal output by each antenna is the same, and is equal to the total power of the transmit signal divided by the number N of transmit antennas from which the signal is to be transmitted. By reducing output power requirements for each power amplifier, the silicon area of the power amplifiers are reduced by as much as N times (where N is equal to the number of transmit antennas) relative to a non-equal gain composite beamforming technique..]. .Iadd.A method and apparatus are disclosed for a multiple input multiple output (MIMO) transmission technique by a wireless communications device which includes providing that the power applied to each transmit antenna may be equal to the total power of the transmit signal divided by the number N of transmit antennas from which the signal is to be transmitted. The device may produce a weight for each of the N transmit antennas used in MIMO transmission. Also, the device may determine a total transmit power and produce a multi-carrier signal for transmission. The device may weight the multi-carrier signal for each antenna per the produced weight. Further, the device may apply a power to each of the N transmit antennas, for the weighted multicarrier signal, which is equal to the total transmit power divided by N. Each transmit antenna signal may be amplified by an amplifier coupled to that antenna..Iaddend.



Inventors:
Sugar; Gary L. (San Francisco, CA), Vaidyanathan; Chandra (Rockville, MD)

Applicant:


Name

City

State

Country

Type


IPR LICENSING, INC.
Wilmington
DE
US


Assignee:
IPR Licensing, Inc. (Wilmington, DE)


Appl. No.:
14/563,231

Filed:
December 8, 2014


Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

13755945 Jan 31, 2013
10800610 Jul 17, 2007 7245881
10174689 Aug 31, 2004 6785520
60380139 May 6, 2002
60365797 Mar 21, 2002
60361055 Mar 1, 2002
Reissue of: 11879156 Jul 16, 2007 7881674 Feb 1, 2011
Reissue of: 11879156 Jul 16, 2007 7881674 Feb 1, 2011




Current U.S. Class: 1/1
Current International Class: H04B 1/00 (20060101); H01Q 3/28 (20060101)
Field of Search: ;455/69

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