Back to results
US 6,646,449 B2Granted
Intermodulation detector for a radio receiver
AssigneeNokia Corporation
InventorsPauli Seppinen, Aarno Pärssinen, Mikael Gustafsson
Life of this patent
Estimating the term…
Abstract
An intermodulation detector (11) that operates standalone or in parallel with a radio receiver (10) of a radio receiver system (100) including a receiver tuning logic module (12), and, in the case of operating standalone, provides signals conveying information about intermodulation power in the receiver frequency band, and in case of operating in parallel with a radio receiver (10), provides to the receiver tuning logic module signals conveying information about power aliasing into the frequency band to which the radio receiver is tuned.
Claims15
A method, comprising:
- a) a step (31), responsive to a received signal over a predetermined wide bandwidth including a desired signal on a predetermined channel, for providing a selected signal including the predetermined channel;
- and
- b) a step (32) of processing the selected signal so as to provide a detector signal indicating intermodulation distortion (IMD3) on the predetermined channel, the processing including filtering the selected signal as necessary so as to produce a processed signal not including the desired signal but including possible third order intermodulation products of signals associated with other channels and included in the received signal, and further including at least one third-order nonlinear operation on the processed signal.
An apparatus (11), comprising:
- a) means (700701707677), responsive to a received signal over a predetermined wide bandwidth including a desired signal on a predetermined channel, for providing a selected signal including the predetermined channel;
- and
- b) means (7171072720704a) for processing the selected signal so as to provide a detector signal indicating intermodulation distortion (IMD3) on the predetermined channel, the processing including filtering the selected signal as necessary so as to produce a processed signal not including the desired signal but including possible third order intermodulation products of signals associated with other channels and included in the received signal, and further including at least one third-order nonlinear operation on the processed signal.
Dependencies are inferred from the claim text.