GPU-based broadband signal DDC system design method

Abstract

The invention discloses a GPU (Graphics processing unit)-based broadband signal DDC (Direct Down Conversion) system design method, which aims at executing a complex digital signal processing functionin parallel by utilizing a lightweight thread and a kernel of a GPU and mainly completing two tasks, namely digital channelization and sampling rate change. A multiphase filtering digital channelization method is taken as a scheme main body, and a group processing function for broadband acquisition signals is realized, and DDC sampling data is output in parallel in multiple paths. And an efficientresampling method is combined, so that the system is matched with any output sampling rate. According to the GPU-based broadband signal DDC system design method, the powerful general computing powerof the GPU is used; and the parallelism degree of the algorithm is mined, and the algorithm is transplanted to a GPU heterogeneous platform through CUDA programming, and heterogeneous parallel optimization means such as memory optimization, thread organization scheduling optimization and stream processing architecture are adopted, so that the algorithm complexity is effectively reduced, and the scheme has high throughput and high flexibility and adapts to a real-time processing environment.

Description

technical field [0001] The invention relates to a design method of a wideband signal DDC system based on GPU. Designed to take advantage of the GPU's lightweight threads and cores to perform complex signal processing functions in parallel. Background technique [0002] Digital down conversion (Digital down conversion, DDC) is an important module connecting the ADC conversion module and the digital processing system in the software radio technology. The decimation filter restores the original signal, which solves the problem of mismatch between high-speed sampling and low-speed data. DDC is the first processing work to be completed after A / D sampling. It is the part with the largest amount of digital processing calculations in the system. Sometimes the sampling rate reaches GHz, and the maximum working rate can only reach a few hundred megahertz. Traditional FPGA processing It is difficult for the server to process high-speed data, and it has the disadvantages of low flexib...

AI Technical Summary

Problems solved by technology

DDC is the first processing work to be completed after A / D sampling. It is the part with the largest amount of digital processing calculations in the system. Sometimes the sampling rate reaches GHz, and the maximum working rate can only reach a few hundred megahertz. Traditional FPGA processing It is difficult for the server to process high-speed data, and it has the disadvantages of low flexibility and poor scalability

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