发明公开
EP2263321A1 HIGH-LINEARITY RECEIVER WITH TRANSMIT LEAKAGE CANCELLATION 有权
带减速传输损耗高线性接收机

  • 专利标题: HIGH-LINEARITY RECEIVER WITH TRANSMIT LEAKAGE CANCELLATION
  • 专利标题(中): 带减速传输损耗高线性接收机
  • 申请号: EP09719148.0
    申请日: 2009-03-11
  • 公开(公告)号: EP2263321A1
    公开(公告)日: 2010-12-22
  • 发明人: GUDEM, Prasad, S.CHANG, Li-Chung
  • 申请人: QUALCOMM Incorporated
  • 申请人地址: Attn: International IP Administration 5775 Morehouse Drive San Diego, CA 92121 US
  • 专利权人: QUALCOMM Incorporated
  • 当前专利权人: QUALCOMM Incorporated
  • 当前专利权人地址: Attn: International IP Administration 5775 Morehouse Drive San Diego, CA 92121 US
  • 代理机构: Reedy, Orlaith
  • 优先权: US46387 20080311
  • 国际公布: WO2009114638 20090917
  • 主分类号: H04B1/52
  • IPC分类号: H04B1/52
HIGH-LINEARITY RECEIVER WITH TRANSMIT LEAKAGE CANCELLATION
摘要:
Techniques for performing transmit (TX) leakage cancellation are described. A receiver includes a low noise amplifier (LNA) and a TX leakage canceller. The LNA amplifies a receiver input signal and provides an amplified signal. The TX leakage canceller includes a downconverter, a notch filter, and an upconverter. The downconverter downconverts a canceller input signal (e.g., obtained from the LNA output) with a first LO signal at a transmit frequency and provides a downconverted signal. The notch filter filters the downconverted signal to pass an undesired signal (e.g., a TX leakage signal) and attenuate a jammer and a desired signal in the canceller input signal. The upconverter upconverts the filtered signal with a second LO signal at the transmit frequency and provides a feedback signal. The feedback signal is subtracted at the input or output of the LNA to cancel the undesired signal.
公开/授权文献
信息查询
0/0