Flexible LDPC decoder architectures

  • Authors:
  • Muhammad Awais;Carlo Condo

  • Affiliations:
  • Department of Electronics and Telecommunications, Politecnico di Torino, Torino, Italy;Department of Electronics and Telecommunications, Politecnico di Torino, Torino, Italy

  • Venue:
  • VLSI Design - Special issue on Flexible Radio Design: Trends and Challenges in Digital Baseband Implementation
  • Year:
  • 2012

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Abstract

Flexible channel decoding is getting significance with the increase in number of wireless standards and modes within a standard. A flexible channel decoder is a solution providing interstandard and intrastandard support without change in hardware. However, the design of efficient implementation of flexible low-density parity-check (LDPC) code decoders satisfying area, speed, and power constraints is a challenging task and still requires considerable research effort. This paper provides an overview of state-of-the-art in the design of flexible LDPC decoders. The published solutions are evaluated at two levels of architectural design: the processing element (PE) and the interconnection structure. A qualitative and quantitative analysis of different design choices is carried out, and comparison is provided in terms of achieved flexibility, throughput, decoding efficiency, and area (power) consumption.