Title:
MULTI-CELL PRE-CODING METHOD FOR INHIBITING PILOT POLLUTION IN LARGE-SCALE DISTRIBUTED ANTENNA SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/084223
Kind Code:
A1
Abstract:
The present invention relates to a multi-cell pre-coding method for inhibiting pilot pollution in a large-scale distributed antenna system, which falls within the technical field of wireless communications. The method comprises: calculating an estimation value of an uplink channel from a user to an RAU in a central cell according to signals received by antennas of the RAU in the central cell; calculating a covariance matrix of an estimation error of the uplink channel of the RAU in the central cell; constructing estimation values of channel vectors from the user to all the RAUs in the central cell; constructing estimation values of channel matrices from all the users to all the RAUs in the central cell; calculating transmission signal vectors of the central cell obtained after performing multi-cell pre-coding on data vectors of all the users in the central cell; and performing normalization to obtain actual vectors of signals which are finally transmitted by the antennas of various RAUs in the central cell. The method can effectively inhibit the impact of pilot pollution on the downlink pre-coding performance, and improve the system throughput; and can greatly reduce the pre-coding calculation complexity.
Inventors:
SU XIN (CN)
ZENG JIE (CN)
XIAO CHIYANG (CN)
WANG JING (CN)
XU XIBIN (CN)
ZHAO MING (CN)
XIAO LIMIN (CN)
ZENG JIE (CN)
XIAO CHIYANG (CN)
WANG JING (CN)
XU XIBIN (CN)
ZHAO MING (CN)
XIAO LIMIN (CN)
Application Number:
PCT/CN2016/075471
Publication Date:
May 26, 2017
Filing Date:
March 03, 2016
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
H04B7/04
Domestic Patent References:
| WO2015167117A1 | 2015-11-05 |
Foreign References:
| CN103634816A | 2014-03-12 | |||
| US20130195000A1 | 2013-08-01 |
Other References:
WANG, HAIRONG ET AL: "Precoding and Pilot Scheduling in Very Large MIMO Multi-Cell TDD 1-7 System", JOURNAL OF SIGNAL PROCESSING, vol. 29, no. 8, 31 August 2013 (2013-08-31)
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
Download PDF: