InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,331,757
Nazar , et al. May 3, 2016

Open loop spatial processing


Abstract

Methods and apparatus for multiple-input multiple-output (MIMO) transmissions are disclosed. A base station may precode wireless transmit/receive unit (WTRU)-specific reference signals and data that are transmitted to a WTRU using a randomly selected precoder. The precoder may be selected based on a predefined precoder selection sequence or by the base station. A different precoder may be applied to different resource blocks (RBs). In addition, a large delay cyclic delay diversity (CDD) or discrete Fourier transform (DFT) spreading may be applied on the WTRU-specific reference signals and the data. For heterogeneous deployed antennas, spatial diversity gain is achieved by dynamically scheduling resources between transmission points. A hopping scheme may be applied across the transmission points as the resources are dynamically partitioned between the transmission points. A different randomly selected precoder may be applied to each RB transmitted from a different transmission point.



Inventors:
Nazar; Shahrokh Nayeb (Quebec, CA), Olesen; Robert L. (Huntington, NY), Raghavan; Manasa (West Babylon, NY), Fazili; Muhammad U. (Audubon, PA), Lawton; William E. (Parker Ford, PA), Li; Yingxue K. (Exton, PA)

Applicant:


Name

City

State

Country

Type


Nazar; Shahrokh Nayeb
Olesen; Robert L.
Raghavan; Manasa
Fazili; Muhammad U.
Lawton; William E.
Li; Yingxue K.
Quebec
Huntington
West Babylon
Audubon
Parker Ford
Exton
N/A
NY
NY
PA
PA
PA
CA
US
US
US
US
US


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


Family ID:
1000001818553

Appl. No.:
13/457,145

Filed:
April 26, 2012


Prior Publication Data






Document Identifier

Publication Date

US 20120275530 A1 Nov 1, 2012



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

61480459 Apr 29, 2011




Current U.S. Class: 1/1
Current CPC Class: H04B 7/0456 (20130101); H04B 7/022 (20130101); H04L 25/0206 (20130101); H04L 25/03343 (20130101); H04L 2025/03426 (20130101)
Current International Class: H04B 7/02 (20060101); H04B 7/04 (20060101); H04L 25/02 (20060101); H04L 25/03 (20060101

PPP