Invention Grant
- Patent Title: Adjacent channel interference mitigation for FM digital audio broadcasting receivers
- Patent Title (中): FM数字音频广播接收机的相邻信道干扰减轻
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Application No.: US10136136Application Date: 2002-05-01
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Publication No.: US07221917B2Publication Date: 2007-05-22
- Inventor: Brian William Kroeger
- Applicant: Brian William Kroeger
- Applicant Address: US MD Columbia
- Assignee: IBiquity Digital Corporation
- Current Assignee: IBiquity Digital Corporation
- Current Assignee Address: US MD Columbia
- Agency: Pietragallo Bosick & Gordon, LLP
- Agent Robert P. Lenart, Esq.
- Main IPC: H04B1/16
- IPC: H04B1/16

Abstract:
A method of receiving an FM digital audio broadcasting signal including a first plurality of subcarriers in an upper sideband of a radio channel and a second plurality of subcarriers in a lower sideband of the radio channel comprises the steps of mixing the digital audio broadcasting signal with a local oscillator signal to produce an intermediate frequency signal, passing the intermediate frequency signal through a bandpass filter to produce a filtered signal, determining if one of the upper and lower sidebands of the digital audio broadcasting signal is corrupted, and adjusting the local frequency oscillator signal to change the frequency of the intermediate frequency signal such that the bandpass filter removes the subcarriers in the upper or lower sideband that has been corrupted. A receiver that processes a digital audio broadcasting signal in accordance with the method is also provided.
Public/Granted literature
- US20030207669A1 Adjacent channel interference mitigation for FM digital audio broadcasting receivers Public/Granted day:2003-11-06
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