VDIF format data heterogeneous parallel framing method based on GPU

Abstract

The invention discloses a VDIF format data heterogeneous parallel framing method based on a GPU, and relates to the technical field of communication. According to the invention, the high flexibility and the high-efficiency parallel data processing capability of a graphics processing unit (GPU) are fully utilized; a GPU-based data format framing method conforming to VDIF specifications is provided,and a frame header calculation process, a multi-channel single-thread framing mode and a multi-channel multi-thread framing mode are designed respectively. A host receives input data in a multi-channel mode through a GPU, obtains input parameters, calculates frame header parameters, calculates the number of frames per second and the number of data bits per second of the input data, and judges whether the number of frames per second of the input data is an integer or not and whether the number of data bits per second is an integer multiple of the number of quantized bits or not; and if YES, asingle-channel single-thread mode or a multi-channel single-thread mode is selected according to requirements; and a single-channel single-data-thread process and a multi-channel single-data-thread process are executed respectively.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a GPU-based heterogeneous parallel frame encoding method for VDIF format data. Background technique [0002] Very Long Baseline Interferometry (VLBI) technology has been widely used in deep space measurement and control systems because of its unique ultra-high spatial resolution and positioning accuracy, and the VLBI Data Interchange Interface Specification (VLBI Data Interchange Format, VDIF) is the most widely supported data format in the VLBI field, and is the basis for international VLBI joint observation data exchange. [0003] At present, the VLBI baseband conversion and recording system of the deep space measurement and control network is a VLBI digital backend (Digital Backend Equipment, DBE) system developed based on the FPGA platform. The system supports both the VSI standard specification and the RDEF specification from the beginning of the design. However, wit...

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Problems solved by technology

[0005] (1) It is difficult to reconstruct the system architecture based on FPGA, and it is difficult to upgrade;

[0006] (2) Failure to support the VDIF data exchange format;

[0007] (3) Lack of efficient heterogeneous parallel frame encoding method based on GPU

[0008] At present, there is no scheme to improve the framing of VDIF format data by using Graphic Process Unit (GPU).

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