Adjacent channel interference reduction in a FM receiver
AssigneeDelphi Technologies, Inc.
InventorTodd Matthew Brandenburg
Life of this patent
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Abstract
A processor controlled FM receiver implements a technique for reducing adjacent channel interference without requiring additional components. Initially, the technique determines whether a desired channel has interference. If so, signal information on adjacent channels is collected. The desired channel is then shifted away from one of the adjacent channels if the collected signal information indicates that only one of the adjacent channels is appreciably interfering with the desired channel.
Claims20
A method for reducing adjacent channel interference in a processor controlled FM receiver, comprising the steps of:
- (a) collecting signal information on a desired channel and determining if the desired channel has undesirable interference;
- (b) switching from the desired channel to an adjacent channel when the desired channel has undesirable interference, otherwise remaining tuned to the desired channel;
- (c) determining a signal level of the adjacent channel;
- and
- (d) shifting the desired channel away from the adjacent channel if the signal level of the adjacent channel indicates the adjacent channel is interfering with the desired channel.
A tuning system for reducing adjacent channel interference in an FM receiver, comprising:
- a tuner;
- a processor coupled to the tuner;
- a memory coupled to the processor, the memory storing data and instructions;
- and
- tuning code located in the memory for causing the processor to perform the steps of:
- (a) collecting signal information on a desired channel and determining whether the desired channel has undesirable interference;
- (b) switching the tuner from the desired channel to an adjacent channel when the desired channel has undesirable interference, otherwise remaining tuned to the desired channel;
- (c) determining a signal level of the adjacent channel;
- and
- (d) shifting the desired channel away from the adjacent channel if the signal level of the adjacent channel indicates the adjacent channel is interfering with the desired channel.
Dependencies are inferred from the claim text.