Communications receivers and methods therefor
AssigneeMotorola, Inc.
InventorsLouis Vannatta, David Haub, John Solar
Life of this patent
Estimating the term…
Abstract
A method in a radio communication device having a receiver receiving a wideband signal in the presence of narrowband blockers method in direct conversion and intermediate frequency RF receivers including determining power for signal distortion products (40), determining power for a desired signal and the distortion products (41), filtering the signal distortion products with a filter having a bandwidth of rejection, and dynamically adjusting a rejection property (43) as a function of the power for both the desired signal and the signal distortion products. In some embodiments, a determination is made whether a ratio of powers exceeds a threshold (45) as a condition for adjusting the rejection property.
Claims27
A method in direct conversion and intermediate frequency RF receivers having a signal with a desired signal portion and a distortion products portion, comprising:
- determining a ratio of powers,
- the ratio of powers is power of the signal distortion products divided by power of both the desired signal and the signal distortion products;
- determining whether the ratio of powers exceeds a predetermined threshold;
- filtering the signal distortion products with a filter having a non-zero bandwidth of rejection if the ratio of powers is above the predetermined threshold.
A method in direct conversion and intermediate frequency RF receivers, comprising:
- determining power for a desired signal;
- determining power for signal distortion products;
- filtering the signal distortion products with a filter;
- dynamically adjusting a bandwidth of rejection of the filter as a function of the power for both the desired signal and the signal distortion products.
A method in direct conversion and intermediate frequency RF receivers, comprising:
- determining power for signal distortion products;
- determining power for a desired signal;
- filtering the signal distortion products with a filter;
- dynamically adjusting a rejection of the filter as a function of the power for both the desired signal and the signal distortion products.
A method in radio communications devices having a receiver receiving a wideband signal in the presence of narrowband blockers, comprising:
- determining power for narrowband intermodulation distortion products;
- determining power for a desired signal;
- filtering the desired signal and distortion products;
- dynamically adjusting at least one of a bandwidth of rejection and rejection of the filter as a function of the power for both the desired signal and the narrowband intermodulation distortion products.
A method an RF receiver, comprising:
- determining power for a signal distortion product;
- determining power for a desired signal;
- filtering the signal distortion product and the desired signal with a filter;
- dynamically adjusting a filter rejection property as a function of the power for both the desired signal and the signal distortion products.
Dependencies are inferred from the claim text.