Detecting and eliminating spurious energy in communications systems via multi-channel processing
First Claim
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1. A method of determining spurious channel activity comprising:
- determining when plural channels become active near simultaneously;
when plural channels become active near simultaneously comparing the signal strengths of the plural channels to identify a spurious channel responsive to the compared signal strengths.
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Abstract
The present invention allows multi-channel communications equipment to detect and eliminate a false interpretation of interference as a valid signal. The solution is based on the observation that the simultaneous arrival of energy on two independent channels is an impossible event. So, when such an event happens, it is a reliable signature of confusing out-of-band energy for a valid signal.
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Citations
16 Claims
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1. A method of determining spurious channel activity comprising:
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determining when plural channels become active near simultaneously;
when plural channels become active near simultaneously comparing the signal strengths of the plural channels to identify a spurious channel responsive to the compared signal strengths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A spurious channel activity detector comprising:
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at least two modems, each modem assigned to a respective channel and configured to assert a channel-activity signal responsive to its respective channel becoming active; and
a spurious signal detector coupled to the at least two modems adapted to identify near simultaneity responsive to more than one channel activity signals being asserted within a predetermined time window. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A spurious channel activity detector comprising:
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means for determining when plural channels become active near simultaneously;
when plural channels become active near simultaneously;
means for comparing the signal strengths of the plural channels; and
means for identifying a spurious channel responsive to the compared signal strengths.
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Specification