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Empirical validation and performance of duty cycle–based DTMC model in channel estimation

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Abstract

This paper explores the learning capability of hidden Markov model (HMM) in capturing the temporal correlation and predicting primary user (PU) activity pattern of real spectrum data of GSM-900 band through an USRP-LabVIEW platform for cognitive radio (CR) systems. The inability of the widely used stationary Markov model in estimating the occupancy pattern of primary channels for a long duration of time has been verified. We proposed an alternative duty cycle (DC)–based two-state discrete-time Markov chain (DTMC-DC) model. Analysis of empirical data indicates that DC required for a non-stationary DTMC-DC model can be well approximated by a trapezoidal shape and the PU spectrum usage pattern estimated using DTMC-DC is capable of learning the statistical behavior (length of idle and busy interval periods) of a real channel accurately with a reduced complexity.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Vaagdevi College of Engineering, Warangal, Telangana, 506005, India

    Dipen Bepari

  2. Department of Electronics and Communication Engineering, DIT University, Dehradun, Uttarakhand, 248009, India

    Santasri Koley

  3. Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, 826004, India

    Debjani Mitra

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  1. Dipen Bepari
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  2. Santasri Koley
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  3. Debjani Mitra
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Correspondence to Dipen Bepari.

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Bepari, D., Koley, S. & Mitra, D. Empirical validation and performance of duty cycle–based DTMC model in channel estimation. Ann. Telecommun. 75, 229–240 (2020). https://doi.org/10.1007/s12243-019-00747-1

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  • DOI: https://doi.org/10.1007/s12243-019-00747-1

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