Methods and receiver for positioning of clock related spurious signals

A system for positioning a spurious signal for reducing an impact of the spurious signal on a received Orthogonal Frequency Division Multiplexing (OFDM) signal comprising:

• controller circuitry operationally coupled to a first oscillator and a second oscillator, wherein the controller circuitry is configured to:
• determine a frequency of the spurious signal, wherein the spurious signal originates from a frequency signal of the first oscillator;
• determine a frequency for a subcarrier of the OFDM signal and determine a frequency difference between the frequency of the sub-carrier and the spurious signal;
• adjust the frequency of the first oscillator to decrease the frequency difference;
• and
• adjust a parameter related to a frequency of the second oscillator, wherein the parameter includes a control parameter for determining the frequency of the second oscillator.

A method in a mobile terminal of positioning a spurious signal for reducing an impact of the spurious signal on a received Orthogonal Frequency Division Multiplexing (OFDM) signal, the method comprising:

• determining, by controller circuitry operationally coupled to a first oscillator, a frequency of the spurious signal, wherein the spurious signal originates from a frequency signal of the first oscillator;
• determining a frequency for a sub-carrier of the OFDM signal;
• determining a frequency difference between the frequency of the sub-carrier and the frequency of the spurious signal;
• adjusting the frequency of the first oscillator to decrease the frequency difference;
• and
• adjusting, by the controller circuitry that is also operationally coupled to a second oscillator, a parameter related to a frequency of the second oscillator so that the frequency of the second oscillator equals a carrier frequency of the OFDM signal.

A system for positioning a spurious signal for reducing an impact of the spurious signal on a received Orthogonal Frequency Division Multiplexing (OFDM) signal comprising:

• controller circuitry operationally coupled to a first oscillator and a second oscillator, wherein the controller circuitry is configured to:
• determine a frequency of the spurious signal, wherein the spurious signal originates from a frequency signal of the first oscillator;
• determine a frequency for a subcarrier of the OFDM signal and determine a frequency difference between the frequency of the sub-carrier and the spurious signal;
• adjust the frequency of the first oscillator to decrease the frequency difference;
• and
• adjust a parameter related to a frequency of the second oscillator so that the frequency of the second oscillator equals a carrier frequency of the OFDM signal.