Method for demodulating a RF signal in the presence of inband harmonic spurs
AssigneeSTMicroelectronics (Grand Ouest) SAS
InventorsDidier Harnay, Francois Sittler
Life of this patent
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Abstract
The present disclosure relates to a method for demodulating a radio frequency (RF) signal comprising the steps of determining the nearest harmonic of a clock signal from a central frequency (Frx) of a received frequency band; and, if said nearest harmonic is in said frequency band, setting an intermediate frequency (IF) of a Near Zero Intermediate Frequency (NZIF) receiver to the difference (SpurOffset) between said central frequency (Frx) and said nearest harmonic.
Claims24
A method for demodulating a radio frequency (RF) signal, the method comprising:
- determining a nearest harmonic of a clock signal from a central frequency of a received frequency band;
- and
- when the nearest harmonic is in the received frequency band, setting an intermediate frequency of a Near Zero Intermediate Frequency (NZIF) receiver to a difference between the central frequency and the nearest harmonic.
An apparatus for demodulating a radio frequency (RF) signal, comprising:
- an RF signal demodulation circuit configured to:
- determine a nearest harmonic of a clock signal from a central frequency of a received frequency band;
- and
- when the nearest harmonic is in the received frequency band, set an intermediate frequency of a Near Zero Intermediate Frequency (NZIF) receiver to a difference between the central frequency and the nearest harmonic.
An apparatus for demodulating a radio frequency (RF) signal, comprising:
- an RF signal demodulation circuit configured to:
- determine a nearest harmonic of a clock signal from a central frequency of a received frequency band;
- when the nearest harmonic is in the received frequency band, set an intermediate frequency of a Near Zero Intermediate Frequency (NZIF) receiver to a difference between the central frequency and the nearest harmonic;
- amplify the RF signal;
- and
- split the amplified RF signal into a first path and a second path to obtain a first path signal and a second path signal.
Dependencies are inferred from the claim text.