Wireless Personal Communications

, Volume 95, Issue 3, pp 2561–2573 | Cite as

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



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.


Cognitive radio (CR) Generalized selection combining (GSC) Space time block coding (STBC) Multiple-input-multiple-output (MIMO) 



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


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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Kavita Vij Bindra
    • 1
  • Surbhi Sharma
    • 1
  • Rajesh Khanna
    • 1
  1. 1.ECEDThapar UniversityPatialaIndia

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