InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,867,147
Pelletier , et al. January 9, 2018

Method and apparatus for transmit power control for multiple antenna transmissions in the uplink


Abstract

Techniques for transmit power control for multiple antenna transmissions in an uplink are disclosed. A wireless transmit/receive unit (WTRU) generates at least one input stream for transmission and applies a gain factor to each channel. The gain factor is determined based on a reference channel power estimate. The WTRU generates at least two data streams from the input stream for transmission via a plurality of antennas and applies weights to the data streams. The gain factor and/or the weights are controlled such that a transmit power on each antenna is within a maximum allowed value. The WTRU may perform power scaling on a condition that a transmit power on any antenna exceeds the maximum allowed value. The WTRU may scale down an enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH) first before other channels. For multiple E-DCH streams, the WTRU may calculate an E-DPDCH power offset based on an additional power offset factor due to multiple stream transmission.



Inventors:
Pelletier; Benoit (Montreal, CA), Cai; Lujing (Morganville, NJ), Zhang; Hong (Manalapan, NJ)

Applicant:


Name

City

State

Country

Type


InterDigital Patent Holdings, Inc.
Wilmington
DE
US


Assignee:
InterDigital Patent Holdings, Inc. (Wilmington, DE)


Family ID:
1000003053887

Appl. No.:
14/708,850

Filed:
May 11, 2015


Prior Publication Data






Document Identifier

Publication Date

US 20150245304 A1 Aug 27, 2015



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

12896668 Oct 1, 2010 9031600
61248034 Oct 2, 2009
61247995 Oct 2, 2009




Current U.S. Class: 1/1
Current CPC Class: H04W 52/34 (20130101); H04J 13/00 (20130101); H04L 1/1812 (20130101); H04W 52/367 (20130101); H04W 72/0473 (20130101); H04W 52/42 (20130101); H04B 7/0413 (20130101); H04B 7/0465 (20130101); H04B 7/0615 (20130101); H04W 52/146 (20130101)
Current International Class: H04B 7/00 (20060101); H04L 1/18 (20060101); H04W 72/04 (20090101); H04J 13/00 (20110101); H04W 52/36 (20090101); H04W 52/34 (20090101); H04B 7/04 (20170101); H04B 7/0413 (20170101); H04W 52/14 (20090101); H04W 52/42 (20090101); H04B 7/06 (20060101)
Field of Search: ;455/522,517,562.1,127.2,501,509

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