Device and a method for extracting timing information from a radio signal

A method comprising:

• extracting first preliminary timing information from a first circular polarized component of a radio signal,
• extracting second preliminary timing information from a second circular polarized component of the radio signal, the second circular polarized component of the radio signal having an opposite handedness and time-delay with respect to the first circular polarized component of the radio signal,
• producing (303) timing information based on at least one of the following:
• the first preliminary timing information and the second preliminary timing information, and
• using stored correction data based on one or more measured or estimated values of the time delay and being suitable for reducing an effect of the time-delay on the timing information when producing the timing information based on at least the second preliminary timing information.

A non-volatile computer readable medium encoded with a computer program for controlling a device that comprises:

• equipment for extracting first preliminary timing information from a first circular polarized component of a radio signal and for extracting second preliminary timing information from a second circular polarized component of the radio signal, the second circular polarized component of the radio signal having an opposite handedness and a time-delay with respect to the first circular polarized component of the radio signal, and
• a programmable processing system,
• the computer program comprising computer executable instructions for controlling the programmable processing system to:
• produce timing information based on at least one of the following:
• the first preliminary timing information and the second preliminary timing information, and
• use stored correction data based on one or more measured or estimated values of the time delay and being suitable for reducing an effect of the time-delay on the timing information when producing the timing information based on at least the second preliminary timing information.