Circuits and methods for detecting interferers

A circuit for detecting interferers, the circuit comprising:

• a first in-phase mixer that receives and mixes a radio frequency (RF) signal and an in-phase local oscillator signal to produce a first in-phase mixer output signal;
• a first quadrature-phase mixer that receives and mixes the radio frequency (RF) signal and a quadrature-phase local oscillator signal to produce a first quadrature-phase mixer output signal;
• a first in-phase filter that receives and filters the first in-phase mixer output signal to produce a first in-phase filtered signal;
• a first quadrature-phase filter that receives and filters the first quadrature-phase mixer output signal to produce a first quadrature-phase filtered signal;
• a first in-phase branch that comprises:
• a second in-phase mixer that receives and mixes the first in-phase filtered signal and a first pseudorandom noise signal to produce a second in-phase mixer output signal;
• a second in-phase filter that receives and filters the second in-phase mixer output signal to produce a second in-phase filtered signal;
• and
• a first in-phase analog-to-digital converter that receives the second in-phase filtered signal to produce a first in-phase digitized signal;
• a second in-phase branch that comprises:
• a third in-phase mixer that receives and mixes the first in-phase filtered signal and a second pseudorandom noise signal to produce a third in-phase mixer output signal;
• a third in-phase filter that receives and filters the third in-phase mixer output signal to produce a third in-phase filtered signal;
• and
• a second in-phase analog-to-digital converter that receives the third in-phase filtered signal to produce a second in-phase digitized signal;
• a first quadrature-phase branch that comprises:
• a second quadrature-phase mixer that receives and mixes the first quadrature-phase filtered signal and the first pseudorandom noise signal to produce a second quadrature-phase mixer output signal;
• a second quadrature-phase filter that receives and filters the second quadrature-phase mixer output signal to produce a second quadrature-phase filtered signal;
• and
• a first quadrature-phase analog-to-digital converter that receives the second quadrature-phase filtered signal to produce a first quadrature-phase digitized signal;
• a second quadrature-phase branch that comprises:
• a third quadrature-phase mixer that receives and mixes the first quadrature-phase filtered signal and the second pseudorandom noise signal to produce a third quadrature-phase mixer output signal;
• a third quadrature-phase filter that receives and filters the third quadrature-phase mixer output signal to produce a third quadrature-phase filtered signal;
• and
• a second quadrature-phase analog-to-digital converter that receives the third quadrature-phase filtered signal to produce a second quadrature-phase digitized signal;
• a complex combiner that combines the first in-phase digitized signal and the first quadrature-phase digitized signal to produce a first combined signal and that combines the second in-phase digitized signal and the second quadrature-phase digitized signal to produce a second combined signal;
• and
• at least one hardware processor that receives the first combined signal and the second combined signal and that identifies at least one interferer in the RF signal using the first combined signal and the second combined signal.