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Software implementation of multithreshold decoders on GPU

Keywords:

V.V. Zolotarev – Dr. Sc. (Eng.), Professor, Senior Research Scientist, Space Research Institute of RAS (Moscow) E-mail: zolotasd@yandex.ru G.V. Ovechkin – Dr. Sc. (Eng.), Associate Professor, Professor, Ryazan State Radio Engineering University E-mail: g_ovechkin@mail.ru P.V. Ovechkin – Ph. D. (Eng.), Associate Professor, Ryazan State Radio Engineering University E-mail: pavel_ov@mail.ru


Multithreshold decoder (MTD) is discussed. The decoder is simplest decoder of majority type and is used for decoding of self-orthogonal codes. MTD has low implementation complexity and is simple for hardware implementation. These allows to use MTD in high-speed communication and data storage systems with rates 1 Gbit/s and more. This paper presents background of MTD, comparison results of MTD bit-error rate performance and the performance of other error correction methods, known hardware MTD implementations. It\'s noted the last time telecommunications specialists pay more attention to software-defined radio (SDR). In SDR a significant part of the digital signal processing is performed on a standard personal computer. So software decoders need to be used to ensure required information decoding rate and to provide efficient error correction. The work submit high speed software binary MTD for a block self-orthogonal code. This version of MTD uses computing abilities of modern graphics processing units (GPU). During implementation of software MTD on GPU all arrays used by encoder and decoder were accommodated in the shared and constant memory. Conflict-free access to the elements of such arrays and the simultaneous decoding of several symbols within the message received from a channel used by GPU threads were provided. These allows MTD to provide parallel and independent decoding of several hundred blocks received from the channel. Simulation results are presented show the op-eration rate of the software MTD implemented on GPU GTX 970 was up to 350 Mbit/s. So, software MTD submitted in this paper can be used in high-speed software-defined radio systems based on graphics processing units.
References:

 

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