A Highly Compatible Circular-Shifting Network for Partially Parallel QC-LDPC Decoder - International Journal of Communications, Network and System Sciences

IJCNS > Vol.10 No.5, May 2017

A Highly Compatible Circular-Shifting Network for Partially Parallel QC-LDPC Decoder ()

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DOI: 10.4236/ijcns.2017.105B003 1,129 Downloads 2,165 Views

Author(s)

Yanzhi Wang¹, Zhenzhi Wu², Peipei Liu¹, Ning Guan¹, Hua Wang¹

Affiliation(s)

¹School of Information and Electronics, Beijing Institute of Technology, Beijing, China.
²Center for Brain-Inspired Computing Research, Tsinghua University, Beijing, China.

ABSTRACT

The conventional methodology for designing QC-LDPC decoders is applied for fixed configurations used in wireless communication standards, and the supported largest expansion factor Z (the parallelism of the layered decoding) is a fixed number. In this paper, we study the circular-shifting network for decoding LDPC codes with arbitrary Z factor, especially for decoding large Z (Z P) codes, where P is the decoder parallelism. By buffering the P-length slices from the memory, and assembling the shifted slices in a fixed routine, the P-parallelism shift network can process Z-parallelism circular-shifting tasks. The implementation results show that the proposed network for arbitrary sized data shifting consumes only one times of additional resource cost compared to the traditional solution for only maximum P sized data shifting, and achieves significant saving on area and routing complexity.

KEYWORDS

Partially Parallel Layered Decoding, Circular-Shifting Network, QC-LDPC Decoder, Arbitrary Expansion Factor

Share and Cite:

Wang, Y. , Wu, Z. , Liu, P. , Guan, N. and Wang, H. (2017) A Highly Compatible Circular-Shifting Network for Partially Parallel QC-LDPC Decoder. International Journal of Communications, Network and System Sciences, 10, 24-34. doi: 10.4236/ijcns.2017.105B003.

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