Method for synchronous transmission of digital array antenna baseband excitation data

A digital array and synchronous transmission technology, which is applied in transmission systems, synchronization devices, digital transmission systems, etc., can solve the problems of large volume, complex processing of digital processing parts, high power consumption, etc., and achieve simple processing, low power consumption, and channel phase small error effect

Inactive Publication Date: 2019-04-16
10TH RES INST OF CETC
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Problems solved by technology

Although the beamforming of the all-digital array antenna is flexible, its digital processing part is complex, with high power consumption and large volume. Especially for a relatively large-scale digital array, it is difficult to integrate the processing end and the antenna end together. The si

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  • Method for synchronous transmission of digital array antenna baseband excitation data
  • Method for synchronous transmission of digital array antenna baseband excitation data
  • Method for synchronous transmission of digital array antenna baseband excitation data

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Embodiment Construction

[0018] Refer to figure 1 . According to the present invention, the optical fiber is used as the long-distance transmission medium between the collecting end and the receiving end, and each collecting module of the collecting end receives the radio frequency signals of 1 to N receiving antenna units through a radio frequency front-end module connected to corresponding 1 to N receiving antenna units. ~N analog / digital converters ADC1~ADCN sample the RF signal and convert it into intermediate frequency signal through their respective RF front-end modules. 1~N intermediate frequency signals are packaged and converted into signal level according to JESD204B protocol. CML level electrical signal high-speed serial data stream, the CML level electrical signal is sent to the electro-optical conversion module to convert it into an optical signal. After the conversion, the optical signal carrying the sampled data is transmitted through the optical fiber to 1~N. On the optical fiber electr...

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Abstract

The invention discloses a method for synchronous transmission of digital array antenna baseband excitation data. The method is featured by small channel phase error, simple processing of digital processing part and low power consumption baseband excitation data. In the method, optical fiber is adopted as a long-distance transmission media between a collecting end and a receiving end, 1-N ADC1-ADCNof the collecting end perform data sampling on RF signals, and convert the signal into an intermediate frequency signal, packages data according to a JESD204B protocol and converts the data into a high-speed serial data flow, and sends the data flow to an electro-optical conversion module to be converted into optical signal, then an optical fiber photoelectric conversion module recovers the optical signal into an electric signal and sends the electric signal to the receiving end FPGA1-FPGAK to complete data recovery, then data is aligned through channel calibration, sample signals with data aligned are simultaneously transmitted to a received data processing end FPGA, and a full link data synchronous transmission homologous synchronous clock network synchronizes data.

Description

Technical field [0001] The invention relates to a digital array antenna DAA in the fields of measurement and control, optical fiber communication and time-frequency synchronization technology, and particularly relates to a method for synchronous transmission of digital array antenna multi-channel data optical fiber communication. Background technique [0002] With the development of photonics technology and the substantial reduction of optical fiber cost, optical fiber transmission has been widely used in phased array antennas. The introduction of optical technology into the phased array antenna has brought many advantages. The use of optical fiber as the transmission medium is light in weight, small in size, flexible, strong in electromagnetic interference (EMI) and electromagnetic pulse (EMP), and has low loss. Solve the problem of size and weight limitations caused by cable feeding, and conductive cables that interfere with the radiation direction of the transmitter unit. And...

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Application Information

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IPC IPC(8): H04L7/00
CPCH04L7/0075
Inventor 唐洪军彭智李典贾明权张昊唐宇孙亮
Owner 10TH RES INST OF CETC
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