SYSTEM AND METHOD FOR RADIO FREQUENCY CALIBRATION EXPLOITING CHANNEL RECIPROCITY IN DISTRIBUTED INPUT DISTRIBUTED OUTPUT WIRELESS COMMUNICATION

Title:

SYSTEM AND METHOD FOR RADIO FREQUENCY CALIBRATION EXPLOITING CHANNEL RECIPROCITY IN DISTRIBUTED INPUT DISTRIBUTED OUTPUT WIRELESS COMMUNICATION

Document Type and Number:

Japanese Patent JP2019169967

Kind Code:

A

Abstract:

To provide a system and method for radio frequency (RF) calibration in a multiple antenna system (MAS) with multi-user (MU) transmissions ("MU-MAS") exploiting uplink/downlink channel reciprocity.SOLUTION: The RF calibration is used to compute open-loop downlink precoder on the basis of uplink channel estimates, thereby avoiding feedback overhead for channel state information as in closed-loop schemes. For example, an MU-MAS of one embodiment comprises a wireless cellular network with one or multiple beacon stations, multiple client devices and multiple distributed antennas operating cooperatively via precoding methods to eliminate inter-client interference and increase network capacity.SELECTED DRAWING: Figure 16

Inventors:

ANTONIO FORENZA
FADI SAIBI
TIMOTHY A PITMAN
STEPHEN G PERLMAN

Application Number:

JP2019093904A

Publication Date:

October 03, 2019

Filing Date:

May 17, 2019

Export Citation:

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Assignee:

REARDEN LLC

International Classes:

H04B7/0456; H04B7/024; H04B7/0413; H04B7/06; H04W16/28

Foreign References:

WO2012007837A1	2012-01-19
WO2012061325A1	2012-05-10

Other References:

吉田　進　他: "コヒーレントCoMP による無線分散ネットワークの研究開発", ICT イノベーションフォーラム2013, JPN6020023475, 2013, ISSN: 0004511489
CMCC: "Discussion on CQI definition for non-PMI/RI reporting[online]", 3GPP TSG-RAN WG1#70 R1-123739, JPN6021019564, 17 August 2012 (2012-08-17), ISSN: 0004511490

Attorney, Agent or Firm:

Shinichiro Tanaka
Hiroyuki Suda
Fumiaki Otsuka
Takaki Nishijima
Hiroshi Uesugi
Naoki Kondo
Takeo Nasu
Shinya Kamada

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