Streaming architecture broadband signal digital down-conversion system based on GPU

Abstract

According to the streaming architecture broadband signal digital down-conversion system based on a GPU, the GPU is used as a core data processing device, so that the development difficulty of a digital down-converter can be effectively reduced, and the frequency mixing and filtering operation precision is improved; furthermore, GPU streams are used as a parallel operation basis, each stream is used for processing data in one channel, multiple streams are concurrently used for realizing multi-channel real-time parallel processing, the number of GPUs can be flexibly configured according to performance requirements, and multi-channel data parallel processing is realized in the GPUs and among the GPUs by using multiple streams and multiple threads; therefore, compared with a traditional digital down-converter based on an FPGA, the digital down-converter is flexible in reconstruction, higher in reliability, better in expansibility and higher in operation precision; compared with a traditional digital down-converter based on a GPU, the parallelism of data processing is better, simultaneous parallel processing of multiple channels of signals can be achieved, and the requirement for digital down conversion of multiple channels of broadband signals of any bandwidth of a communication system can be met.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a GPU-based streaming architecture broadband signal digital down-conversion system. Background technique [0002] In a traditional communication system, the signal receiving system is usually divided into two parts, the front end and the back end. The back-end mainly completes functions such as tracking, synchronization, and demodulation of baseband signals, while the front-end mainly completes functions such as down-conversion, filtering, sampling, and extraction of radio frequency signals. At present, with the development of software radio technology, the digital front end has gradually replaced the original analog front end and has been widely used in the communication field because of its programmable and flexible features. [0003] Current broadband communication systems generally have a bandwidth of tens of MHz or even hundreds of MHz, and simultaneously...

AI Technical Summary

Problems solved by technology

[0006] (1) It is difficult to realize the parallel processing of multi-channel signals of down-converter based on GPU;

[0007] (2) The development cycle of FPGA-based down-converter system is long, difficult to reconfigure, and difficult to upgrade;

[0008] (3) FPGA resources are limited, and performance and efficiency are difficult to balance

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