Local oscillator switching control for a very low intermediate frequency receiver

A very low intermediate frequency receiver comprising:

• a local oscillator;
• an electronic processor coupled to the local oscillator and configured to
• provide, using the local oscillator, a first intermediate frequency;
• detect, using an interferer detector, an adjacent or alternate channel interference signal and an image or alternate of the adjacent channel interference signal causing interference with a desired signal;
• determine whether the desired signal is an analog signal;
• in response to determining that the desired signal is an analog signal
• control the local oscillator to provide a second intermediate frequency;
• in response to determining that the desired signal is not an analog signal
• determine a switching condition based on the desired signal;
• and
• control the local oscillator to provide the second intermediate frequency in response to detecting the switching condition.

A method for controlling a very low intermediate frequency (VLIF) receiver, the method comprising:

• providing, using a local oscillator, a first intermediate frequency;
• detecting, using an interferer detector, a far-out interference signal causing interference with a desired signal;
• determining, using an electronic processor, whether the desired signal is an analog signal;
• in response to determining that the desired signal is an analog signal
• controlling, using the electronic processor, the local oscillator to provide a second intermediate frequency;
• in response to determining that the desired signal is not an analog signal
• determining, using the electronic processor, a switching condition based on the desired signal;
• and
• controlling, using the electronic processor, the local oscillator to provide the second intermediate frequency in response to detecting the switching condition.