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Báo cáo hóa học: " Parallel LDPC decoding using CUDA and OpenMP"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Parallel LDPC decoding using CUDA and OpenMP | Park and Chung EURASIP Journal on Wireless Communications and Networking 2011 2011 172 EURASIP Journal on http jwcn.eurasipjournals.eom content 2011 1 172 Wireless Communications and Networking a SprlngerOpen Journal RESEARCH Open Access Parallel LDPC decoding using CUDA and OpenMP Joo-Yul Park and Ki-Seok Chung Abstract Digital mobile communication technologies such as next generation mobile communication and mobile TV are rapidly advancing. Hardware designs to provide baseband processing of new protocol standards are being actively attempted because of concurrently emerging multiple standards and diverse needs on device functions hardware-only implementation may have reached a limit. To overcome this challenge digital communication system designs are adopting software solutions that use central processing units or graphics processing units GPUs to implement communication protocols. In this article we propose a parallel software implementation of low density parity check decoding algorithms and we use a multi-core processor and a GPU to achieve both flexibility and high performance. Specifically we use OpenMP for parallelizing software on a multi-core processor and Compute Unified Device Architecture CUDA for parallel software running on a GPU. We process information on H-matrices using OpenMP pragmas on a multi-core processor and execute decoding algorithms in parallel using CUDA on a GPU. We evaluated the performance of the proposed implementation with respect to two different code rates for the China Multimedia Mobile Broadcasting CMMB standard and we verified that the proposed implementation satisfies the CMMB bandwidth requirement. Keywords LDPC decoder parallel processing CUDA graphic processing unit 1. Introduction Today wireless devices transmit and receive high rate data in real-time. The need to provide high transmission rates with reliability is increasing in order to offer various multimedia services with 4G mobile communication systems. Typical data .