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  • 1.
    Panigrahi, Smruti Ranjan
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Electronics. School of Electrical Engineering, KTH Royal Institute of Technology, Sweden.
    Björsell, Niclas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Electronics.
    Bengtsson, Mats
    School of Electrical Engineering, KTH Royal Institute of Technology, Sweden.
    Feasibility of Large Antenna Arrays towards Low Latency Ultra Reliable Communication2017In: 2017 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL TECHNOLOGY (ICIT), 2017, p. 1289-1294, article id 7915549Conference paper (Refereed)
    Abstract [en]

    Industrial automation and safety applications demand low latency and ultra reliable communication. Currently deployed wireless communication technologies are mostly developed for non-critical applications and hence, they are not suitable for these kind of applications. On the other hand, cable based communication is widely popular in industries, even though it has limitations towards cost of installment and is susceptible towards mechanical wear and tear. This paper reviews the feasibility of large antenna arrays at the receiver to achieve low latency and ultra reliable communication for up-link scenarios. The suitability of both coherent and non-coherent multiple input multiple output (MIMO) receivers are investigated. Non-coherent MIMO receiver is found to be a promising option as signal to noise power ratio (SNR) is fairly reasonable in achieving the desired reliability. The effect of antenna correlation at the transmitter and at receiver on reliability are also looked into. Its influence on the system performance is very nominal. Moreover, in certain scenarios, antenna correlation at the transmitter gives a significant improvement in system performance. Furthermore, having a single antenna at the sensors is found not to be a limiting factor in achieving the desired performance goal.

  • 2.
    Panigrahi, Smruti Ranjan
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Electronics. KTH Royal Institute of Technology, Sweden.
    Björsell, Niclas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Electronics.
    Bengtsson, Mats
    KTH Royal Institute of Technology, Sweden.
    Large Antenna Array for Low-Latency and Ultra-Reliable Communication2017Conference paper (Other academic)
    Download full text (pdf)
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  • 3.
    Panigrahi, Smruti Ranjan
    et al.
    KTH, Teknisk informationsvetenskap.
    Björsell, Niclas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Electronics.
    Bengtsson, Mats
    KTH, Signaler, sensorer och system.
    Multipath Radio Propagation in Industrial Indoor Environments at the 24 GHz ISM bandManuscript (preprint) (Other academic)
    Abstract [en]

    Millimeter wave (mmWave) wireless technology is one of the candidate features in fifth-generation mobile technology(5G) and has the potential to revolutionize the industrial automation and manufacturing processes. This article investigates multipath radio channel propagation in indoor industrial environments at one of the mmWave frequency bands. The wideband radio channel measurements at the 24 GHz ISM band were carried out in four different industrial environments in Sweden. The measurements were conducted using an affordable but highly competent in-house assembled mmWave testbed, reusing several radio instruments available in our lab. The measurement environments were chosen based on their radio wave reflection characteristics. The multipath propagation characteristics are analyzed with respect to the power delay profile (PDP), coherence bandwidth, and root mean square (RMS) delay spread. Additionally, the Saleh-Valenzuela model parameters are estimated for these industrial environments.

  • 4.
    Panigrahi, Smruti Ranjan
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Electronics.
    Björsell, Niclas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Electronics.
    Bengtsson, Mats
    KTH.
    Path Loss at the 24 GHz ISM band for Industrial Indoor Environments2022In: IEEE International Conference on Factory Communication Systems (WFCS), 2022Conference paper (Refereed)
    Abstract [en]

    Millimeter wave (mmWave) frequency bands, ranging from 24 GHz to 100 GHz, are primarily considered for the low latency communication in fifth generation mobile technology (5G). This article investigates path loss modeling atthe 24 GHz industrial, scientific, and medical (ISM) band in indoor industrial environments. Radio channel measurements were carried out to study the narrow-band channel characteristics in three different industrial environments in Sweden. The measurements were conducted using an affordable but highly competent in-house assembled mmWave testbed, reusing several radio instruments available in our lab. A comprehensive study isperformed to investigate the path loss based on three different models.

    Download full text (pdf)
    fulltext
  • 5.
    Panigrahi, Smruti Ranjan
    et al.
    KTH, Teknisk informationsvetenskap.
    Björsell, Niclas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Electronics.
    Bengtsson, Mats
    KTH, Signaler, sensorer och system.
    Radio Channel Measurement in Industrial Indoor Environments at the 24 GHz ISM band: Path loss and Channel FadingManuscript (preprint) (Other academic)
    Abstract [en]

    Millimeter wave (mmWave) frequency bands, ranging from 24 GHz to 100 GHz, are one of the candidate features of fifth generation mobile technology (5G). This article investigates the channel fading and path loss modeling in indoor industrial environments at the 24 GHz ISM band. The radio channel measurements were carried out to study the narrowband channel characteristics in three different industrial environments in Sweden. The measurements were conducted using an affordable but highly competent in-house assembled mmWavetestbed, reusing several radio instruments available in our lab. A comprehensive study is performed to investigate various radio channel propagation aspects, like the large scale fading, and the small scale fading. We examine the large scale fading with three different path loss models. The impact of the transmitter and receiver separation distance on the small scale fading is also investigated.

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