An efficient QR decomposition design for MIMO systems

Jing Shiun Lin, Yin Tsung Hwang, Po Han Chu, Ming-Der Shieh, Shih Hao Fang

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

4 Citations (Scopus)


Multiple-input multiple-output (MIMO) techniques have been widely used in various wireless communication systems these days. QR factorization is a fundamental module yet computationally intensive used in many MIMO detection schemes. In this paper, a complex-valued QR factorization (CQRF) scheme realized via a sequence of real-value Givens rotations is first presented. An efficient CQRF design using coordinate rotation digital computer (CORDIC) modules is next developed. The design features a highly parallel architecture to support high throughput operations. One CQRF can be obtained in every 8 clock cycles. To reduce the circuit complexity, a pipelined CORDIC structure is also applied. The implementation results in TSMC 0.18-μm CMOS process indicate that the proposed design can achieve a throughput rate of 25MCQRFs per second while consuming only 103.7k gates in circuit complexity. Performance evaluation based on a composite index consisting of area and throughput rate also shows the advantages of the proposed design against other similar works.

Original languageEnglish
Title of host publicationISCAS 2012 - 2012 IEEE International Symposium on Circuits and Systems
Number of pages4
Publication statusPublished - 2012
Event2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012 - Seoul, Korea, Republic of
Duration: 2012 May 202012 May 23


Other2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012
Country/TerritoryKorea, Republic of

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering


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