Invention Grant
- Patent Title: Method of PCI and CQI estimation in CDMA systems
- Patent Title (中): CDMA系统中PCI和CQI估计方法
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Application No.: US13383544Application Date: 2010-08-18
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Publication No.: US08767579B2Publication Date: 2014-07-01
- Inventor: Duong Pham
- Applicant: Duong Pham
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: AU2009904046 20090825
- International Application: PCT/JP2010/064317 WO 20100818
- International Announcement: WO2011/024825 WO 20110303
- Main IPC: G01R31/08
- IPC: G01R31/08 ; H04W4/00

Abstract:
A method includes: receiving symbols from antenna(s); calculating average-channel estimates of the symbols over a measurement period; forming a channel matrix from the average-channel estimates; calculating a power ratio between a closed-loop mode and an open-loop mode for each PCI using the channel matrix; calculating RSCP value(s) and ISCP value(s) corresponding to the antenna(s); averaging the RSCP value(s) and ISCP value(s) over the antenna(s) to provide averaged RSCP and ISCP; calculating open-loop SINR from the averaged RSCP and ISCP; calculating SINR for stream(s) for each PCI from the power ratio and the open-loop SINR; determining TBS for a single stream from a single-stream-CQI table using calculated SINR; determining TBS for all streams from a dual-stream-CQI table using calculated SINR; comparing the TBS of the single stream and TBS of the dual stream to determine whether to select single stream or dual stream; and determining PCI and CQI for the stream(s).
Public/Granted literature
- US20120120841A1 METHOD OF PCI AND CQI ESTIMATION IN CDMA SYSTEMS Public/Granted day:2012-05-17
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