Multi-target medium frequency digital phased-array antenna

Abstract

The invention provides a multi-target medium frequency digital phased-array antenna, and provides a phased-array antenna, which has small resource consumption, less required direct digital control (DDC) modules, and needs one DDC module for each target. The multi-target medium frequency digital phased-array antenna is realized through the following technical scheme: in an antenna array side which is formed by individual array elements, the radio frequency front end of each individual array element corresponds to an analog to digital converter (ADC) unit (3) which is correspondingly connected with the individual array element, each ADC unit (3) converts an output analog medium frequency signal into a digital medium frequency signal, the digital medium frequency signal output by each ADC unit (3) is converted into an analytic signal by an individual digital beam forming (DBF) unit (4) which corresponds to an individual target, then the analytic signal is multiplied with an individual complex number weight vector which is produced by a weight production unit (5) which is correspondingly connected with each ADC unit (3), so wave beam synthesis is completed, an individual wave beam synthesis output signal is filtered by a channelizing band-pass filter unit (6) which is correspondingly connected, so the digital medium frequency signal of the individual target is obtained and is transferred to respective DDC units (7), and the baseband signal of the individual target is output.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a multi-target intermediate frequency digital phased array antenna in a wireless receiver. Background technique [0002] The phased array antenna realizes the adjustment of the array pattern by adjusting the phase of the signal received by each array element, so that the main lobe is always aligned with the direction of arrival (Direction of Arrival, DOA) of the desired signal, so that without mechanically rotating the antenna, Gain array buffs. For the wireless communication receivers with superheterodyne structure, the software radio structure of intermediate frequency digitization is basically adopted at present. In this receiver structure, the usual digital phased array antenna phase adjustment is implemented at the baseband, that is, digital beamforming (Digital Beamforming, DBF) is performed at the baseband. Although the baseband implementation method has low signal ...

AI Technical Summary

Problems solved by technology

Although the baseband implementation method has low signal rate, high reliability, and simple implementation, since each array element of the receiver needs a receiving channel before DBF, the baseband implementation method requires more digital downloads. Inverter module (Digital Down Convertor, DDC)

Due to the implementation of digital phased array antennas in the baseband, too many DDC modules are required, and the resource consumption is too large. High Cost of Digital Phased Array Antenna Implementation

Images