US 8,798,195 B2 · Wireless communication system, base station, terminal and method of generating codebook

Abstract

The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal.

Claims10

Dependent claims

A terminal apparatus comprising:

a codebook storing section configured to store an extended codebook, which is generated by combining a first basic codebook and a second basic codebook along a column direction, wherein the first basic codebook includes N groups each consisting of four basic pre-coding column vectors that are orthogonal to each other (N is a natural number equal to or greater than 2), and wherein the second basic codebook is generated by applying phase offsets to the N groups, respectively, each of the phase offsets applied to the N groups being different from each other;
and
a feedback section configured to feed back to a base station an index (a pre-coding matrix indicator (PMI)) that identifies one pre-coding extended column vector from among the 4N pre-coding extended column vectors included in the extended codebook.

Dependencies are inferred from the claim text.

Facts

Application

13/634,210Filed 15 Mar 2011

Priority

CN 2010 1 012516916 Mar 2010

Published

US 2013/0010895 A110 Jan 2013

Granted

5 Aug 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

H04B 7/0478
Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting: special codebook structures directed to feedback optimisation
H04B 7/024
Site diversity; Macro-diversity: co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input…
H04B 7/0456
MIMO systems: selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
H04B 7/0634
Feedback content: antenna weights or vector/matrix coefficients

Wireless communication system, base station, terminal and method of generating codebook

Life of this patent

Wireless communication system, base station, terminal and method of generating codebook

Life of this patent

Abstract

Claims10