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Paper Abstract and Keywords
Presentation 2018-07-27 10:55
A Min-Sum LDPC Decoder with Variable Parallelism and Its Memory Bank Access Scheduling Method
Taishi Watanabe, Hiroshi Tsutsui (Hokkaido Univ.), Takashi Imagawa (Ritsumeikan Univ.), Yoshikazu Miyanaga (Hokkaido Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, LDPC (low-density parity-check) codes have been widely used in various applications including 5G wireless communication systems due to its powerful error-correcting capability. Considering its decoder design, since one design cannot be the optimum for all applications and devices, we need to design a dedicated LDPC decoder of each specific standardized parity check matrix for each application and device, which requires high design costs. Moreover, in the processing of LDPC decoders, the memory access conflict is a serious issue as one of the reasons limiting its throughput. Motivated by this, we are aiming to establish a framework that automatically generates an RTL implementation based on a baseline architecture considering the required performance under given design constraints. In this paper, we propose a min-sum LDPC decoder with variable parallelism and its memory bank access scheduling method. We demonstrate the proposed approach showing a fully parallel implementation of an LDPC decoder utilizing row parallel processing and column parallel processing and its half parallelism version. Experimental results show that the fully parallel implementation archives an output throughput of 800Mbps with 3.13M required gates and that its half parallelism version archives 282.4Mbps with 1.80M gates.
Keyword (in Japanese) (See Japanese page) 
(in English) LDPC code / min-sum decoding / parallel processing / / / / /  
Reference Info. ITE Tech. Rep., vol. 42, no. 23, BCT2018-71, pp. 47-50, July 2018.
Paper # BCT2018-71 
Date of Issue 2018-07-19 (BCT) 
ISSN Print edition: ISSN 1342-6893    Online edition: ISSN 2424-1970
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Conference Information
Conference Date 2018-07-26 - 2018-07-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Broadcast Operating Technologies, Transmission & Reception Engineering, etc. 
Paper Information
Registration To BCT 
Conference Code 2018-07-BCT-BT-HOKKAIDO 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Min-Sum LDPC Decoder with Variable Parallelism and Its Memory Bank Access Scheduling Method 
Sub Title (in English)  
Keyword(1) LDPC code  
Keyword(2) min-sum decoding  
Keyword(3) parallel processing  
1st Author's Name Taishi Watanabe  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Hiroshi Tsutsui  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Takashi Imagawa  
3rd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
4th Author's Name Yoshikazu Miyanaga  
4th Author's Affiliation Hokkaido University (Hokkaido Univ.)
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Speaker Author-1 
Date Time 2018-07-27 10:55:00 
Presentation Time 25 minutes 
Registration for BCT 
Paper # BCT2018-71 
Volume (vol) vol.42 
Number (no) no.23 
Page pp.47-50 
Date of Issue 2018-07-19 (BCT) 

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