Invention Grant
- Patent Title: Method and system for reducing inter-cell interference using intra-ENB downlink coordinated multipoint services
- Patent Title (中): 使用ENB下行协调多点业务减少小区间干扰的方法和系统
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Application No.: US13549718Application Date: 2012-07-16
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Publication No.: US08812039B2Publication Date: 2014-08-19
- Inventor: Jiandong Zhuang
- Applicant: Jiandong Zhuang
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee Address: SE Stockholm
- Agency: Ericsson Canada Inc.
- Agent Jean-Pierre Fortin
- Main IPC: H04W24/02
- IPC: H04W24/02 ; H04B7/04 ; H04B15/00

Abstract:
A system and method of cancelling downlink inter-channel interference between a first selected UE in one sector of a cell and a second selected UE in a second sector of said cell by using intra-eNB DL CoMP is described. UEs which are affected by ICI are identified in sectors which are adjacent to each other in the cell. A downlink CoMP operational set is formed for the identified UEs. Channel matrix blocks are estimated for the first and second selected UEs. The channel matrix blocks are representations of the channel characteristics between the first and second UE, in their respective sectors and the serving base station. The estimated channel matrix blocks are then loaded into a cross-sector channel block matrix. The inverse values of the channel matrix blocks are then calculated to form a sector specific cross-sector pre-coding matrix which is used to enable interference cancellation.
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