Full-hardware network interface applied to very long baseline interferometry (VLBI) hardware related processor

Abstract

The invention relates to a full-hardware network interface applied to a very long baseline interferometry (VLBI) hardware related processor. The full-hardware network interface is used for enabling the hardware related processor to receive data from an outside data playback device, namely a client side. The full-hardware network interface comprises a top module, an Ethernet protocol layer, an internet protocol (IP) layer and a transmitting layer which are arranged in a descending order. The top module comprises a first first input first output (FIFO), a second FIFO, a protocol packaging module, a first input first output with locallink interface standard (LLFIFO), an Ethernet media access control (TEMAC) module and a physical layer chip, wherein the protocol packaging module is connected with the first FIFO and the second FIFO; and the LLFIFO, the TEMAC module and the physical layer chip are sequentially connected with the protocol packaging module. The function of the network interface can be achieved through a full-hardware mode based on a field programmable gate array (FPGA) chip, so that the purpose that the hardware related processor receives the data from the outside data playback device and processes the data is achieved.

Description

technical field [0001] The invention relates to an all-hardware network interface applied to a VLBI (Very Long Baseline Interferometry, Very Long Baseline Interferometry) hardware-related processor. Background technique [0002] As the core equipment of VLBI data processing, the hardware-related processor is widely used in radio astronomy observation, precision satellite orbit determination and other occasions. It receives data from external data playback equipment through the network interface, and then the relevant processing part performs correlation operations to obtain VLBI observations. data latency. [0003] The existing hardware-related processors of Shanghai Astronomical Observatory have been used for many years, and often crashes during work, and the interface between the data playback part of the hardware processor and the central control computer is an RS232 serial port, the data transmission rate is low, and the human-computer interaction is not good. convenien...

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And the hardware-related processor under development, because there is no large-capacity FLASH, embedded Linux

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