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    Impact of Relay Location of STANC Bi-Directional Transmission for Future Autonomous Internet of Things Applications

    Tanoli, Shujaat Ali Khan, Shah, Syed Aziz ORCID logoORCID: https://orcid.org/0000-0003-2052-1121, Khan, Muhammad Bilal, Nawaz, Faiza, Hussain, Amir, Al-Dubai, Ahmed Y, Khan, Imran, Shah, Syed Yaseen and Alsarhan, Ayoub (2020) Impact of Relay Location of STANC Bi-Directional Transmission for Future Autonomous Internet of Things Applications. IEEE Access, 8. pp. 29395-29406. ISSN 2169-3536

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    Wireless communication using existing coding models poses several challenges for RF signals due to multipath scattering, rapid fluctuations in signal strength and path loss effect. Unlike existing works, this study presents a novel coding technique based on Analogue Network Coding (ANC) in conjunction with Space Time Block Coding (STBC), termed as Space Time Analogue Network Coding (STANC). STANC achieves the transmitting diversity (virtual MIMO) and supports big data networks under low transmitting power conditions. Furthermore, this study evaluates the impact of relay location on smart devices network performance in increasing interfering and scattering environments. The performance of STANC is analyzed for Internet of Things (IoT) applications in terms of Symbol Error Rate (SER) and the outage probability that are calculated using analytical derivation of expression for Moment Generating Function (MGF). In addition, the ergodic capacity is analyzed using mean and second moment. These expressions enable effective evaluation of the performance and capacity under different relay location scenario. Different fading models are used to evaluate the effect of multipath scattering and strong signal reflection. Under such unfavourable environments, the performance of STANC outperforms the conventional methods such as physical layer network coding (PNC) and ANC adopted for two way transmission.

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