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Performance Analysis of Combined Space Time Block Coding with Generalized Selection Combining in Underlay Cognitive Radio

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Abstract

In this paper, we demonstrate the performance analysis of an underlay MIMO cognitive radios employing space time block coding at secondary’s user transmitter (SU-Tx) and generalized selection combining at secondary’s user receiver. The transmit power strategy enforces the SU-Tx to adapt its power to be transmitted so as to protect primary user’s receiver from harmful interference in order to satisfy primary user outage constraint. We derive closed form expressions for average post processing signal to noise ratio and ergodic capacity. Moreover, approximate expression for average bit error rate is also obtained. Based on the achieved results, we show that the average post processing SNR, Ergodic Capacity and average BER improve as number of best branches to be combined increases. Finally analytical results are affirmed through Monte Carlo simulations.

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Acknowledgement

This research work was supported by Technical Education Quality Improvement Programme (TEQIP) phase II, Government of India.

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Authors and Affiliations

  1. ECED, Thapar University, Patiala, India

    Kavita Vij Bindra, Surbhi Sharma & Rajesh Khanna

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  1. Kavita Vij Bindra
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  2. Surbhi Sharma
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  3. Rajesh Khanna
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Correspondence to Kavita Vij Bindra.

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Bindra, K.V., Sharma, S. & Khanna, R. Performance Analysis of Combined Space Time Block Coding with Generalized Selection Combining in Underlay Cognitive Radio. Wireless Pers Commun 95, 2561–2573 (2017). https://doi.org/10.1007/s11277-016-3934-0

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