Spur detection, cancellation and tracking in a wireless signal receiver
First Claim
1. A method of processing spur components associated with a wireless signal, the method comprising:
- selecting a sub-band of a received signal;
determining a first Fast Fourier Transform (FFT) based, at least in part, on the selected sub-band, the first FFT including a number of frequency bins;
determining a first differential product for each frequency bin of the first FFT based, at least in part, on the first FFT and a complex conjugate of a second FFT based, at least in part, on the selected sub-band; and
determining a spur frequency based, at least in part, on the first differential product.
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Abstract
A method and device for processing spur components associated with a received wireless signal are disclosed. In one embodiment, the method includes first selecting a sub-band of a spectral band of the received signal. The selected sub-band is scanned, and a detection routine is executed to detect a spur within the scanned sub-band having a peak magnitude above a predetermined threshold. The spur frequency is determined, and the spur may be removed by a cancellation unit based on the determined frequency. The method also includes tracking the frequency of the spur to ensure continued suppression over time and under dynamic conditions.
57 Citations
20 Claims
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1. A method of processing spur components associated with a wireless signal, the method comprising:
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selecting a sub-band of a received signal; determining a first Fast Fourier Transform (FFT) based, at least in part, on the selected sub-band, the first FFT including a number of frequency bins; determining a first differential product for each frequency bin of the first FFT based, at least in part, on the first FFT and a complex conjugate of a second FFT based, at least in part, on the selected sub-band; and determining a spur frequency based, at least in part, on the first differential product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A receiver, comprising:
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a radio frequency (RF) front end to receive a signal; and a baseband processor to; select a sub-band of the received signal; determine a first Fast Fourier Transform (FFT) based, at least in part, on the selected sub-band, the first FFT including a number of frequency bins; determine a first differential product for each frequency bin of the first FFT based, at least in part, on the first FFT, and a complex conjugate of a second FFT based, at least in part, on the selected sub-band, wherein the second FFT is determined after the first FFT is determined; and determine a spur frequency based, at least in part, on the first differential product. - View Dependent Claims (12, 13, 14, 15)
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16. A device for processing spur components associated with a wireless signal, the device comprising:
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means for selecting a sub-band of a received signal; means for determining a first Fast Fourier Transform (FFT) based, at least in part, on the selected sub-band, the first FFT including a number of frequency bins; means for determining a first differential product for each frequency bin of the first FFT based, at least in part, on the first FFT and a complex conjugate of a second FFT based, at least in part, on the selected sub-band, wherein the second FFT is determined after the first FFT is determined; and means for determining a spur frequency based, at least in part, on the first differential product. - View Dependent Claims (17, 18, 19, 20)
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Specification