APPARATUS FOR PROVIDING OPEN LOOP DIVERSITY IN RADIO COMMUNICATIONS SYSTEM AND METHOD RELATING THERETO

Title:

APPARATUS FOR PROVIDING OPEN LOOP DIVERSITY IN RADIO COMMUNICATIONS SYSTEM AND METHOD RELATING THERETO

Document Type and Number:

Japanese Patent JP2012135054

Kind Code:

A

Abstract:

To provide an apparatus for providing transmission diversity to an open loop MIMO communication scheme, such as a point-to-multipoint multi-address communication service in a cellular system, and to provide a method relating thereto.

A plurality of data streams of multi-address communication data are multi-address communicated through a transmission diversity antenna of a transmission station. A data symbol of the separate data stream is phase-shifted to be phase-offset from each other. When the data symbol is selectively phase-shifted by a phase shifter, the data stream is provided to a transmission node of each cell by the phase shifter.

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Inventors:

CAI ZHIJUN

Application Number:

JP2012087239A

Publication Date:

July 12, 2012

Filing Date:

April 06, 2012

Export Citation:

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Assignee:

RESEARCH IN MOTION LTD

International Classes:

H04J99/00; H04J11/00

Domestic Patent References:

JP2007510329A	2007-04-19
JP2004538716A	2004-12-24

Foreign References:

WO2007037151A1	2007-04-05
WO2008081683A1	2008-07-10

Other References:

JPN6011069555; Ｙｕｅ　Ｚｈａｎｇ　ｅｔ．ａｌ．: 'Ｆｕｔｕｒｅ　Ｔｒａｎｓｍｉｔｔｅｒ／ＲｅｃｅｉｖｅｒＤｉｖｅｒｓｉｔｙ　Ｓｃｈｅｍｅｓ　ｉｎＢｒｏａｄｃａｓｔ　Ｗｉｒｅｌｅｓｓ　Ｎｅｔｗｏｒｋｓ' Ｃｏｍｍｕｎｉｃａｔｉｏｎ　Ｍａｇａｚｉｎｅ，　ＩＥＥＥ　Ｔｒａｎｓａｃｔｉｏｎｓ　ｏｎＶｏｌ．４４，　Ｎｏ．１０, 200610, ｐｐ．１２０-１２７
JPN6013029794; Ｈｕａｗｅｉ: 'Ｃｏｍｐａｒｉｓｏｎ　ｏｆ　ｄｏｗｎｌｉｎｋ　ｔｒａｎｓｍｉｔ　ｄｉｖｅｒｓｉｔｙ　ｓｃｈｅｍｅｓ　ｗｉｔｈ　ｉｎｔｅｒ-ｃｅｌｌ　ｉｎｔｅｒｆｅｒｅｎｃｅ［ｏｎｌｉｎｅ］' ３ＧＰＰ　ＴＳＧ-ＲＡＮ　ＷＧ１＃４６　　　　Ｒ１-０６２１３５ , インターネット＜ＵＲＬ：ｈｔｔｐ：／／ｗｗｗ．３ｇｐｐ．ｏｒｇ／ｆｔｐ／ｔｓｇ＿ｒａ
CSNC201110038197; Ｈｕａｗｅｉ: 'Ｃｏｍｐａｒｉｓｏｎ　ｏｆ　ｄｏｗｎｌｉｎｋ　ｔｒａｎｓｍｉｔ　ｄｉｖｅｒｓｉｔｙ　ｓｃｈｅｍｅｓ　ｗｉｔｈ　ｉｎｔｅｒ-ｃｅｌｌ　ｉｎｔｅｒｆｅｒｅｎｃｅ［ｏｎｌｉｎｅ］' ３ＧＰＰ　ＴＳＧ-ＲＡＮ　ＷＧ１＃４６　　　　Ｒ１-０６２１３５ , インターネット＜ＵＲＬ：ｈｔｔｐ：／／ｗｗｗ．３ｇｐｐ．ｏｒｇ／ｆｔｐ／ｔｓｇ＿ｒａ

Attorney, Agent or Firm:

Takeshi Oshio

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