high-speed serial interface for satellites based on Virtex-5 series FPGA and TLK2711

Abstract

The invention relates to a high-speed serial interface circuit for satellites based on a Virtex-5 series FPGA (Field Programmable Gate Array) and TLK2711, which is used for receiving an original pulse signal output by a high-resolution earth observation satellite signal detection circuit and outputting information such as micro angular vibration and time to an imaging processing box through a high-speed serial port. Time processing is carried out by receiving PPS information; Meanwhile, the functions of time correction, state monitoring and the like are realized through a CAN interface and a camera lower computer. An FPGA chip of Virtex-5 series of the Xilinx company is used as a platform, TLK2711 is used as a high-speed transceiver, CAN2.0B bus communication is adopted between an external interface and a lower computer of a camera, the communication rate is 500 kbps, and the communication thereof is defined as the main backup communication; the communication with the imaging processing unit is completed through a high-speed communication interface, and the data transmission rate reaches 1.6 Gbps. The design scheme has the characteristics that the power consumption is low, the circuit is miniaturized, and the bit error rate of a high-speed signal in the working period can be ensured to be 0 under the full temperature of a low-orbit space environment.

Description

technical field [0001] The invention relates to a high-speed serial interface design for satellites, in particular to a high-speed serial interface design for satellites based on Virtex-5 series FPGAs and TLK2711. Background technique [0002] If high-resolution earth observation satellites use optical fiber angle sensing to accurately detect the tiny angular vibration information in the satellite, and then use image processing and other means to complete image restoration, the imaging level of optical payloads can be improved. However, the payload data rate of this type of satellite has developed from hundreds of megabits per second of the earlier "resource" series satellites to several Gbits per second at present, and the types of data interfaces between satellite subsystems include synchronous interfaces and asynchronous interfaces , The choice of interface level generally includes TTL level, ECL level, RS422 level, LVDS level and VML level. Among them, the anti-interfer...

AI Technical Summary

Problems solved by technology

In the power management scheme, the conventional circuit processing method is to use the linear regulated power supply MSK series or LW series with anti-radiation and single event indicators. However, the characteristics of the linear power supply determine that the power supply demand of low voltage and high current will lose most of the power. While the overall power consumption has risen sharply, the method of occupying a large area of ​​printed board space or adding a cold plate to the structure is used for heat dissipation, which is not conducive to the design of low power consumption and miniaturization of the product

However, there are few options for small switching power supply chips used in aerospace, and the cost is extremely high and there is a great risk of embargo, so it is difficult to achieve circuit productization and cost savings

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