Invention Grant
US08767579B2 Method of PCI and CQI estimation in CDMA systems 有权
CDMA系统中PCI和CQI估计方法

  • 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
  • Application No.: US13383544
    Application Date: 2010-08-18
  • Publication No.: US08767579B2
    Publication 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
Method of PCI and CQI estimation in CDMA systems
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).
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