Low-latency implementation of CORDIC-based sorted QR decomposition for high-speed MIMO-OFDM system

Hyukyeon Lee, Hanjun Kim, Minjung Cho, Jaeseok Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In this paper, we propose an low-latency coordinate rotation digital computer(CORDIC)-based sorted QR decomposition (SQRD) for high-speed Multiple-Input and Multiple-Output (MIMO) systems. Sorted QRD has been widely adopted to MIMO signal processing to improves the system performance. However, its iterative sorting process after every column operation hinders parallelism and leads to high latency. The proposed CORDIC-based sorted QRD modifies real-value decomposition (RVD) matrix to reduce latency and hardware complexity. It jointly performs sorting processes and CORDIC Givens rotations with adjacent symmetric columns and reduces the numbers of required sorting process and CORDIC stage. The numerical results for a 4 × 4 MIMO show the proposed algorithm reduces the number of CORDIC rotation by 20% in comparison with the conventional sorted QRD. Also, the proposed algorithm requires only 57% of the number of processing stage. The proposed algorithm has been implemented with standard 65 nm cell libraries and achieves reduced latency and complexity compared to the existing results.

Original languageEnglish
Title of host publication2018 28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-4
Number of pages4
ISBN (Electronic)9781538624852
DOIs
Publication statusPublished - 2018 Jun 8
Event28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018 - Prague, Czech Republic
Duration: 2018 Apr 192018 Apr 20

Publication series

Name2018 28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018

Conference

Conference28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018
CountryCzech Republic
CityPrague
Period18/4/1918/4/20

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Instrumentation
  • Electronic, Optical and Magnetic Materials
  • Radiology Nuclear Medicine and imaging

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    Lee, H., Kim, H., Cho, M., & Kim, J. (2018). Low-latency implementation of CORDIC-based sorted QR decomposition for high-speed MIMO-OFDM system. In 2018 28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018 (pp. 1-4). (2018 28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RADIOELEK.2018.8376356