A digital beamforming terminal device for satellite communication

Abstract

The invention relates to a digital beam forming terminal device for satellite communication, and belongs to the technical field of digital beam forming. It includes the first IF switch, the second IF switch, 8-way IF transceiver, test IF transceiver, beamforming and tracking calibration module, modulation and demodulation and interface module, local oscillator network, clock network, power processing and other components, it Through the first IF switch, the second IF switch, the 8-way IF transceiver, and the test IF transceiver, the 8-channel signal or calibration signal is sent to the beamforming and tracking calibration module, modulation and demodulation and interface module for processing, so as to realize zero-adjustment impedance Interference beamforming and carrier signal demodulation; the transmitting end is opposite to the receiving process, completes the data modulation, forms a specific directional beam and transmits. The invention can conveniently realize the functions of amplitude and phase calibration, multi-beam adjustment, side lobe weight optimization, and self-adaptive beam zero adjustment, and has the characteristics of high integration, simple structure, high reliability, convenient scale expansion and the like.

Description

technical field [0001] The invention belongs to the technical field of digital beam forming (Digital Beam Forming, DBF), in particular to a digital beam forming terminal device for satellite communication. Background technique [0002] Because of its small size, low loss, low profile, easy beam zeroing, beam forming, multi-beam, and quick adjustment of beam pointing, active phased array antennas have been used in satellite communication systems for more than ten years. Both the space segment and the user terminal are widely used. [0003] Traditional analog phased array antennas implement phase-shifted beamforming at radio frequency, especially in applications requiring multiple beams, usually using a splitter combiner combined with a Butler matrix. The equipment is bulky and complex, cumbersome to debug, and is greatly affected by the external environment , Moreover, once the beam is determined, it cannot be changed, the array size and the number of beams are limited, the ...

AI Technical Summary

Problems solved by technology

[0003] Traditional analog phased array antennas implement phase-shifted beamforming at radio frequency, especially in applications requiring multiple beams, usually using a splitter combiner combined with a Butler matrix. The equipment is bulky and complex, cumbersome to debug, and is greatly affected by the external environment , Moreover, once the beam is determined, it cannot be changed, the array size and the number of beams are limited, and the side lobe index is also difficult to optimize, and adaptive beam zeroing cannot be realized, etc.

[0004] The traditional satellite communication user terminal station is usually an independent set of antenna equipment and terminal modem equipment, and the two are connected by optical fiber or radio frequency coaxial cable, which takes up a lot of space and the outline of the whole station is high

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