Invention Grant
US08532161B2 Method and apparatus that facilitates estimating Doppler spread for uplink transmissions 失效
便于估计上行链路传输的多普勒扩展的方法和装置

  • Patent Title: Method and apparatus that facilitates estimating Doppler spread for uplink transmissions
  • Patent Title (中): 便于估计上行链路传输的多普勒扩展的方法和装置
  • Application No.: US12817798
    Application Date: 2010-06-17
  • Publication No.: US08532161B2
    Publication Date: 2013-09-10
  • Inventor: Renqiu WangHao Xu
  • Applicant: Renqiu WangHao Xu
  • Applicant Address: US CA San Diego
  • Assignee: QUALCOMM Incorporated
  • Current Assignee: QUALCOMM Incorporated
  • Current Assignee Address: US CA San Diego
  • Agent Nerrie M. Zohn
  • Main IPC: H04B1/00
  • IPC: H04B1/00
Method and apparatus that facilitates estimating Doppler spread for uplink transmissions
Abstract:
Methods, apparatuses, and computer program products are disclosed for performing a Doppler spread estimation. In a first embodiment, an energy associated with a communication from a wireless terminal is ascertained based on at least one pilot symbol and at least one data symbol. Each of an energy variance and a noise variance are then determined to facilitate estimating a speed of the wireless terminal based on the energy variance normalized by the noise variance. In another embodiment, a signal received from a wireless terminal is decoded and replicated. A channel estimate associated with a set of data symbols is then ascertained from the replica, which is used to estimate the speed of the wireless terminal.
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