Multichannel digital TR module

Abstract

The invention discloses a multichannel digital TR module. The TR module comprises a FPGA chip, a system clock network, an ADC chip, a DAC digital-to-analog conversion chip, a gain controller, a receiving interface and a transmitting interface; the receiving interface receives an intermediate frequency signal and transmits the same to the ADC chip to convert into a digital signal, and then the digital signal is transmitted to the FPGA chip; the FPGA chip accomplishes the digital down-conversion processing of eight paths of receiving signals and finally sends processed signals; and meanwhile, the FPGA chip receives a digital beam synthesis signal and sends the digital signal to two DAC digital-to-analog conversion chips after comprehensively processing eight paths of transmitting signals, thereby accomplishing the DUC up-conversion and DAC digital-to-analog conversion, an intermediate analog signal is output to the transmitting interface after the analog signal after the digital-to-analog conversion is controlled through the gain controller. The single TR module of the system supports eight receiving channels and eight transmitting channels.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to a multi-channel digital TR component. Background technique [0002] In the fields of communication, radar and space exploration, the application of phased array antenna has become more and more extensive. As the core component of the phased array antenna, TR is also constantly being updated, and gradually tends to be miniaturized and integrated. [0003] Traditional TR components mainly have the following constraints: no frequency conversion, no signal generation, no frequency source, and relatively simple system design. However, digital TR components can solve these problems well, and at the same time can greatly reduce the volume of TR components and realize system integration. [0004] Traditional TR components use phase shifters and attenuators to weight the amplitude and phase of the signal in the radio frequency band. This method mainly has the following constrain...

AI Technical Summary

Problems solved by technology

[0004] Traditional TR components use phase shifters and attenuators to weight the amplitude and phase of the signal in the radio frequency band. This method mainly has the following constraints: the number of bits of the radio frequency phase shifter cannot be made very high, and the beam jump is relatively large ;The repeatability of analog devices is not high, and it is not easy to maintain and integrate; phased arrays have high requirements for the consistency of TR components, and radio frequency devices are poor in production controllability, which leads to high production debugging time costs and difficulty in mass production

Images