Invention Application
US20140148114A1 ADAPTIVE DC OFFSET CANCELLATION FOR DIRECT CONVERSION RF RECEIVERS 有权
用于直接转换RF接收器的自适应直流偏移消除

  • Patent Title: ADAPTIVE DC OFFSET CANCELLATION FOR DIRECT CONVERSION RF RECEIVERS
  • Patent Title (中): 用于直接转换RF接收器的自适应直流偏移消除
  • Application No.: US14085236
    Application Date: 2013-11-20
  • Publication No.: US20140148114A1
    Publication Date: 2014-05-29
  • Inventor: Tao LiHans WangBinglei ZhangShih Hsiung Mo
  • Applicant: Aviacomm Inc.
  • Applicant Address: US CA Sunnyvale
  • Assignee: Aviacomm Inc.
  • Current Assignee: Aviacomm Inc.
  • Current Assignee Address: US CA Sunnyvale
  • Main IPC: H04B15/02
  • IPC: H04B15/02
ADAPTIVE DC OFFSET CANCELLATION FOR DIRECT CONVERSION RF RECEIVERS
Abstract:
One embodiment of the present invention provides a system for performing DC offset cancellation for a wireless receiver that includes one or more amplification stages between a demodulator and a baseband digital signal processor (DSP). During operation, the system calibrates values of static DC offset associated with a plurality of gain settings for at least one amplification stage, stores the calibrated DC offset values in a lookup table, receives a current gain setting for the amplification stage, maps a DC offset value from the lookup table based on the current gain setting, and cancels static DC offset for the amplification stage using the mapped DC offset value.
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