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Cluster Computing

, Volume 22, Supplement 4, pp 7713–7722 | Cite as

Dual QR decomposition in K-best sphere detection for Internet of Things networks

  • B. Syed Moinuddin BokhariEmail author
  • M. A. Bhagyaveni
Article
  • 210 Downloads

Abstract

Internet of Things (IoT) in 5G communications is becoming more popular due to its robust features. Multiple input multiple output (MIMO) in IoT is playing a vital role nowadays with large and massive concepts. At the same time detection in such scenario is becoming complex day by day. Sphere decoding algorithms is one of the MIMO detection schemes used for achieving near-optimal maximum likelihood detection (MLD) performance. Preprocessing algorithms such as lattice reduction and QR-decomposition (QRD) has been widely used along with the variants of MIMO detection for achieving better bit error rate (BER) performance. This research paper proposes a novel dual QRD (DQRD) algorithm to obtain a universal low complex-lattice reduction aided (UL-LRA)—K-best sphere detection (KSD) for MIMO networks. The proposed algorithm is evaluated under additive white Gaussian noise flat fading and indoor task group ac (TGac-channel D) channel model. The results proved that the BER performance was enhanced as well as the average runtime complexity of LRA–KSD was reduced by 45 and 39% in a flat faded and channel D respectively compared to the optimal MLD using 16-QAM.

Keywords

IoT 5G MIMO Maximum likelihood detection (MLD) Quadrature amplitude modulation (QAM) Bit error rate (BER) Runtime AWGN 

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Department of Electronics and Communication EngineeringCollege of Engineering, Guindy Campus, Anna UniversityChennaiIndia

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