InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,680,538
Xia , et al. June 13, 2017

Method for WiFi beamforming, feedback, and sounding (WiBEAM)


Abstract

Methods for WiFi beamforming, feedback, and sounding (WiBEAM) are described. Codebook based beamforming feedback signaling and sounding mechanisms for use in wireless communications are disclosed. The methods described herein improve the feedback efficiency by using Givens rotation based decompositions and quantizing the resulting angles of the Givens rotation based decompositions using a range from a subset of [0, 2.pi.]. Feedback may also be divided into multiple components to improve feedback efficiency/accuracy. Time domain beamforming reports for taking advantage of channel reciprocity while still taking into account practical radio frequency (RF) channel impairments are also described. Beamforming feedback that prioritizes the feedback bits in accordance with the significance of the bits is also disclosed. A preamble structure to enable the use of smoothing methods for improved channel estimation, codebook designs that may be used for codebook based beamforming feedback, and multi-resolution explicit feedback are disclosed as well.



Inventors:
Xia; Pengfei (San Diego, CA), Ghosh; Monisha (Chappaqua, NY), Lou; Hanqing (Mineola, NY), Olesen; Robert L. (Huntington, NY), Oteri; Oghenekome (San Diego, CA)

Applicant:


Name

City

State

Country

Type


INTERDIGITAL PATENT HOLDINGS, INC.
Wilmington
DE
US


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


Family ID:
1000002647695

Appl. No.:
14/040,249

Filed:
September 27, 2013


Prior Publication Data






Document Identifier

Publication Date

US 20140093005 A1 Apr 3, 2014



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

61707452 Sep 28, 2012
61770879 Feb 28, 2013
61783918 Mar 14, 2013




Current U.S. Class: 1/1
Current CPC Class: H04B 7/0421 (20130101); H04B 7/066 (20130101); H04B 7/0617 (20130101); H04B 7/0628 (20130101); H04B 7/0634 (20130101); H04B 7/0639 (20130101); H04B 7/0641 (20130101); H04L 1/007 (20130101); H04L 1/0073 (20130101)
Current International Class: H04B 7/04 (20060101); H04B 7/06 (20060101); H04L 1/00 (20060101)

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