Coherent multi band peak detection

A multi-band transmitter operative to transmit a multi-band transmit signal which includes a plurality of transmit signals on a respective plurality of frequency bands, comprising:

• a first input configured to receive a first band input signal for a first frequency band of the multi-band transmit signal;
• one additional input configured to receive one additional band input signal for a respective one additional frequency band of the multi-band transmit signal;
• frequency translation circuitry configured to move the first band input signal and the one additional band input signal to symmetric locations with a frequency distance corresponding to a difference of carrier frequencies of a combination of the first band input signal and the one additional band input signal;
• and
• a peak detecting circuitry configured to detect a peak of the combination of the first band input signal and the one additional band input signal taking into account phase information of the first band input signal and the one additional band input signal.

A method of operation of a multi-band transmitter for detecting peaks in a multi-band transmit signal which includes a plurality of transmit signals on a respective plurality of frequency bands, the method comprising:

• receiving a first band input signal and one additional band input signal for a respective one additional frequency band of the multi-band transmit signal;
• determining whether to perform coherent peak detection or non-coherent peak detection based on a frequency distance corresponding to a difference of carrier frequencies of a combination of the first band input signal and the one additional band input signal;
• in response to determining to perform the coherent peak detection:
• moving the first band input signal and the one additional band input signal to symmetric locations with the frequency distance corresponding to the difference of the carrier frequencies of the combination of the first band input signal and the one additional band input signal;
• and
• detecting a peak of the combination of the first band input signal and the one additional band input signal taking into account phase information of the first band input signal and the one additional band input signal;
• and
• in response to determining to perform the non-coherent peak detection:
• moving the first band input signal and the one additional band input signal to symmetric locations with the frequency distance corresponding to the difference of the carrier frequencies of the combination of the first band input signal and the one additional band input signal;
• and
• detecting the peak of the combination of the first band input signal and the one additional band input signal without taking into account the phase information of the first band input signal and the one additional band input signal.