Circuit and method for suppressing interference components in received signal

A processor circuit for suppressing interference in a received signal represented as digital signal samples, the processor circuit comprising:

• an adaptive filter which is configured to operate in an adaptive mode in which the adaptive filter adapts to changes in the received signal, and in a non-adaptive mode in which the adaptive filter has a reduced adaptability compared to the adaptive mode;
• wherein the adaptive filter comprises a first calculation circuit and a second calculation circuit, and
• wherein the processor circuit is configured such that:
• in the non-adaptive mode, the first calculation circuit and the second calculation circuit both perform a filter calculation for applying digital filter coefficients to the digital signal samples;
• and
• in the adaptive mode, the first calculation circuit performs a filter calculation, and the second calculation circuit performs a coefficient update calculation for adaptively updating the digital filter coefficients.

A method of processing a received signal to suppress interference in the received signal, the method comprising:

• implementing an adaptive filter which is configured to operate in an adaptive mode to adapt to changes in the received signal, and in a second mode having a reduced adaptability compared to the adaptive mode;
• operating the adaptive filter in the adaptive mode to process a first quantity of digital signal samples per unit time;
• and
• operating the adaptive filter in the second mode to process a second quantity of digital signal samples per unit time;
• wherein the first quantity is less than the second quantity.

A method of processing a received signal to suppress interference in the signal, the method comprising:

• implementing an adaptive filter which is configured to operate in an adaptive mode to adapt to changes in the received signal, and in a second mode having a reduced adaptability compared to the adaptive mode;
• operating the adaptive filter in the second mode by configuring a first calculation circuit and a second calculation circuit each to perform a first calculation forming at least part of a filter result calculation based on filter coefficients;
• and
• operating the adaptive filter in the adaptive mode by configuring the first calculation circuit to perform the first calculation, and configuring the second calculation circuit to perform a second calculation forming at least part of an update calculation for updating the filter coefficients.