GPU-based 5G multi-user LDPC code high-speed decoder and decoding method thereof

Abstract

The invention provides a 5G multi-user LDPC code high-speed decoder based on a GPU and a decoding method thereof. The 5G multi-user LDPC code high-speed decoder comprises a high-speed decoder architecture and a high-speed decoding method. The decoding method comprises the following steps: 1, initializing a storage space of a host end; 2, initializing the GPU equipment; 3, carrying out LDPC basis matrix information structure weight description; 4, the host side dispatches GPU decoding; 5, copying LLR information; 6, distributing a corresponding thread number by the GPU end according to the user code block information, selecting a corresponding basis matrix information structural body, and performing iterative decoding based on a hierarchical minimum sum algorithm; 7, symbol judgment; and 8, returning the result to the host end. According to the method, the characteristics of a hierarchical decoding algorithm and the architecture characteristics of the GPU are fully combined, GPU on-chip resources are fully utilized, the memory access efficiency and the utilization rate of a data calculation unit are improved, the decoding time of a single code block is shortened while the resource consumption of the single code block is reduced, and the overall information throughput is improved; the decoding mode is more suitable for processing multi-cell and multi-user LDPC code block decoding in an actual scene.

Description

technical field [0001] The invention belongs to the field of communication technologies, and relates to a 5G uplink data channel multi-cell multi-user LDPC code high-speed decoder based on a Graphics Processing Unit (GPU, graphics processor) and a decoding method thereof. Background technique [0002] Currently, communication systems are mainly deployed on two platforms: dedicated hardware platforms and general-purpose processing platforms. Dedicated hardware can be divided into application specific integrated circuits (ASIC), field programmable gate array circuits (FPGA), and the like. Using a communication system based on dedicated hardware can achieve lower latency and higher energy efficiency, but it has a long development cycle and high difficulty in post-operation and maintenance, making it difficult to meet the development needs of future communication systems for diverse tasks. An important trend in the development of next-generation communication systems is deploym...

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Problems solved by technology

[0005] The present invention proposes a GPU-based 5G uplink data channel multi-cell multi-user LDPC code high-speed decoder and its decoding method, which solves the problem of LDPC decoding compatibility of existing decoders in parallel processing of different code lengths and code rates. Further reduce the delay of processing a single code block and improve the throughput of the decoder

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