Digital beamforming terminal device for satellite communication

Abstract

The invention relates to a digital beamforming terminal device for satellite communication, and belongs to the technical field of digital beamforming. The device comprises a first intermediate frequency switch, a second intermediate frequency switch, an eight-channel intermediate frequency transceiver, a test intermediate frequency transceiver, a beamforming and tracking calibration module, a modulation-demodulation and interface module, a local oscillator network, a clock network, a power supply processing module and the like. An eight-channel signal or a calibration signal is sent to the beamforming and tracking calibration module and the modulation-demodulation and interface module to be processed through the first intermediate frequency switch, the second intermediate frequency switch,the eight-channel intermediate frequency transceiver and a test intermediate frequency transceiver, and zero setting anti-interference beam forming and carrier signal demodulation are achieved. The transmitting end is opposite to the receiving process, completes data modulation, forms a specific directional beam and transmits the specific directional beam. According to the invention, the functions of amplitude-phase calibration, multi-beam adjustment, sidelobe weighted optimization and adaptive beam zeroing can be conveniently realized, and the device has the characteristics of high integration degree, simple structure, high reliability, convenience in 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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