System and method for reducing the effect of a radar interference signal
First Claim
1. A method of radar processing, comprising:
- receiving an RF received signal having a frequency modulated continuous wave (FMCW) frequency sweep with a sweep range defining a frequency band;
detecting a frequency of an interfering signal within the RF received signal;
selecting a reduced frequency range less than the sweep range of the received RF signal and within the frequency band to avoid the frequency of the interfering signal; and
processing the received RF signal within the reduced frequency range and excluding parts of the frequency band not within the reduced frequency range.
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Accused Products
Abstract
A system and method are provided to reduce the effect of an interfering signal in a radar return signal for a frequency modulated continuous wave (FMCW) radar. Once the interfering signal is detected, an extent of the interfering signal is determined and the data that was corrupted by the interfering signal is not included in the processing of the radar return signal. This allows the radar to detect a target in the presence of the interfering signal. The system and method can benefit any FMCW radar that is within the range of an interfering radar source (e.g. another FMCW radar, a police radar gun, a pulse radar, etc.) operating in the same frequency band as the FMCW radar. An alternative arrangement provides a system and method for determining the frequency of the interfering signal and then avoiding transmitting power in that portion of the frequency spectrum where the interfering signal is present.
133 Citations
14 Claims
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1. A method of radar processing, comprising:
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receiving an RF received signal having a frequency modulated continuous wave (FMCW) frequency sweep with a sweep range defining a frequency band; detecting a frequency of an interfering signal within the RF received signal; selecting a reduced frequency range less than the sweep range of the received RF signal and within the frequency band to avoid the frequency of the interfering signal; and processing the received RF signal within the reduced frequency range and excluding parts of the frequency band not within the reduced frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radar system, comprising:
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an RF receiving module configured to receive an RF received signal having a frequency modulated continuous wave (FMCW) frequency sweep with a sweep range defining a frequency band, wherein the RF receiving module is configured to provide a downconverted signal in response to the RF return signal; an RF signal sampling module coupled to the RF receiving module and configured to generate time samples associated with the downconverted signal; an interference detector coupled to receive the time samples, configured to detect a frequency of an interfering signal and configured to select a reduced frequency range less than the sweep range of the received RF signal and within the frequency band to avoid the frequency of the interfering signal; and a processor configured to process the received RF signal within the reduced frequency range and excluding parts of the frequency band not within the reduced frequency range. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification