发明公开
EP1961175A1 CARRIER TRACKING FOR AM IN-BAND ON- CHANNEL RADIO RECEIVERS
审中-公开
车辆跟踪AM波段AUFKANAL无线电接收机
- 专利标题: CARRIER TRACKING FOR AM IN-BAND ON- CHANNEL RADIO RECEIVERS
- 专利标题(中): 车辆跟踪AM波段AUFKANAL无线电接收机
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申请号: EP06837373.7申请日: 2006-11-10
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公开(公告)号: EP1961175A1公开(公告)日: 2008-08-27
- 发明人: KROEGER, Brian, W. , WANG, Kun
- 申请人: IBIQUITY DIGITAL CORPORATION
- 申请人地址: 8865 Stanford Boulevard, Suite 202 Columbia, MD 21045 US
- 专利权人: IBIQUITY DIGITAL CORPORATION
- 当前专利权人: IBIQUITY DIGITAL CORPORATION
- 当前专利权人地址: 8865 Stanford Boulevard, Suite 202 Columbia, MD 21045 US
- 代理机构: Maury, Richard Philip
- 优先权: US273396 20051114
- 国际公布: WO2007058980 20070524
- 主分类号: H04L27/00
- IPC分类号: H04L27/00
摘要:
A method for carrier tracking in AM in-band on-channel radio receivers comprises the steps of receiving an input signal, generating a local oscillator signal in response to an oscillator control signal, mixing the input signal with a local oscillator signal to produce a first signal, filtering the first signal to produce a filtered first signal at a decimated sample rate, detecting the phase error and frequency error of the filtered first signal normalized to mitigate effects of signal fades, and using an adaptive loop filter to produce the oscillator control signal in response to the phase error and frequency error of the filtered first signal. An apparatus that performs the method is also provided.
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