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US 2015/0309098 A1Published application
Detector circuit
AssigneeQUALCOMM Incorporated
InventorPeter van der Cammen
Life of this patent
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Abstract
A device comprises a multiplication circuit configured to derive a product of a first signal S1 and a second signal S2, S2 having a phase difference β relative to the first signal S1, a low pass filter configured to remove a selected frequency component from the product of S1 and S2 to derive a dot product S1·S2; and a calculation circuit configured to receive the dot product S1·S2 and generate a signal output having a ratio |S1|/|S2| and the phase difference β.
Claims15
A device, comprising:
- a multiplication circuit configured to derive a product of a first signal S1 and a second signal S2, S2 having a phase difference β relative to the first signal S1;
- a low pass filter configured to remove a selected frequency component from the product of S1 and S2 to derive a dot product S1·S2;
- and
- a calculation circuit configured to receive the dot product S1·S2 and generate a signal output having a ratio |S1|/|S2| and the phase difference β.
1 more element
A method comprising:
- determining three dot products using at least two input signals;
- generating at least two dot product ratios from the three dot products;
- and
- deriving amplitude ratios and phase differences between any set of two of the at least two input signals using the at least two dot product ratios.
1 more element
A device, comprising:
- means for determining three dot products using at least two input signals;
- means for generating at least two dot product ratios from the three dot products;
- and
- means for deriving amplitude ratios and phase differences of the at least two input signals using the at least two dot product ratios.
1 more element
Dependencies are inferred from the claim text.