Wide-band and narrow-band beam alignment method for digital phased array communication equipment

The invention relates to a wide-narrow band wave beam alignment method for digital phased array communication equipment, which comprises the following steps of: firstly, adding a narrow-band synchronous head into a communication message format, and filtering a wide-band signal received by each antenna unit into a narrow-band signal by a digital radio frequency front end during receiving; transmitting to a beam forming module through a limited transmission bandwidth in the equipment to carry out omnibearing coverage of a narrow-band beam, and measuring the orientation of a sending node through an amplitude comparison method; then, adding an attenuation test message into a communication message format, sending the attenuation test message in a form of an amplitude modulation signal, estimating the receiving amplitude of a broadband signal by using the amplitude of the received attenuation test message, and further selecting a corresponding receiving link attenuation coefficient, so that the receiving signal-to-