Performance of cognitive radio networks with maximal ratio combining over correlated Rayleigh fading

Duong, Trung Q.; Le, Thanh-Tan; Zepernick, Hans‐Jürgen

doi:10.1109/icce.2010.5670683

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…Cooperative spectrum sensing technique can improve the performance of the spectrum sensing system [2] by making a final decision on the status of the PU in a centralized or distributed manner. Many different combining techniques, fusion strategies and sensing techniques have been proposed to improve the accuracy and efficiency of cooperative spectrum sensing [3]- [11]. The sensor selection method was investigated in [12] in order to obtain spatially independent sensors.…”

Section: A Related Workmentioning

confidence: 99%

On the Performance of Cooperative Spectrum Sensing in Random Cognitive Radio Networks

Xue

Ratnarajah

et al. 2018

IEEE Systems Journal

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This paper investigates the performance of cooperative spectrum sensing in cognitive radio networks using the stochastic geometry tools. In order to cope with the diversity of received signal-to-noise ratios (SNRs) at secondary users, a practical and efficient cooperative spectrum sensing model is proposed and investigated based on the generalized likelihood ratio test (GLRT) detector. In order to investigate the cooperative spectrum sensing system, the theoretical expressions of the probabilities of false alarm and detection of the local decision are derived. The optimal number of cooperating secondary users is then investigated to achieve the minimum total error rate of the final decision by assuming that the secondary users follow a homogeneous Poisson point process (PPP). Moreover, the theoretical expressions for the achievable ergodic capacity and throughput of the secondary network are derived. Furthermore, the technique of determining an appropriate number of cooperating secondary users is proposed in order to maximize the achievable ergodic capacity and throughput of the secondary network based on a target total error rate requirement. The analytical and simulation results validate the chosen optimal number of collaborating secondary users in terms of spectrum sensing, achievable ergodic capacity and throughput of the secondary network.

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Section: A Related Workmentioning

confidence: 99%

On the Performance of Cooperative Spectrum Sensing in Random Cognitive Radio Networks

Xue

Ratnarajah

et al. 2018

IEEE Systems Journal

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“…7 summarises a step-by-step method to analyse the BER performance of cognitive radio systems based on the work done in [11]. We use the formulae for probability of correct detection and false alarm for secondary user implementing MRC in equicorrelated Rayleigh fading channel as derived in [24]. Table 3 shows the effect of PU interference constraint on the percentage decrease in BER when TAS/MRC is used instead of OSTBC.…”

Section: Mimo-based Cognitive Radio System: a Case Studymentioning

confidence: 99%

Performance analysis comparison of transmit antenna selection with maximal ratio combining and orthogonal space time block codes in equicorrelated Rayleigh fading multiple input multiple output channels

et al. 2014

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In this study, bit error rate (BER) performance of multiple input multiple output (MIMO) systems employing transmit antenna selection with maximal ratio combining (TAS/MRC) and orthogonal space time block codes (OSTBC) is analysed and compared. Analysis has been done for several modulation schemes in equicorrelated Rayleigh fading channels. Novel infinite series expressions for BER of TAS/MRC are proposed in this work. The authors observe that the existing literature on performance analysis of TAS/MRC in correlated channels implicitly or explicitly assume no correlation on the transmitter side. In this work the authors overcome this shortcoming. An alternate closed-form expression for BER performance of OSTBC MIMO systems is derived. This closed-form expression is computationally efficient than existing expressions. Monte Carlo simulations were performed to validate the analytical results. It has been observed that TAS/MRC outperforms OSTBC in terms of BER performance in equicorrelated Rayleigh fading channel. As a case study, performance comparison of cognitive radio (CR) links employing OSTBC and TAS/MRC MIMO systems is investigated in order to show the usefulness of the present analytical study. Even though TAS is the optimum transmit antenna technique in terms of BER performance, OSTBC seems to be a promising alternative for more realistic scenarios in CR systems.

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“…Despite the practical significance of correlated fading, only a few works investigate the effect of cross‐correlation regarding the multipath fading in wireless systems , while the authors in study the generalisation of the effective capacity formula over temporal correlated (auto‐correlated) Nakagami‐ m fading channel in a single wireless link. Furthermore, regarding the CR systems, the literature that deals with correlation on multipath fading channels is very limited and refers to the non‐QoS‐driven ergodic capacity in spectrum sharing networks .…”

Section: Introductionmentioning

confidence: 99%

Effects of spatial correlation on QoS‐driven power allocation over Nakagami‐m fading channels in cognitive radio systems

Poulakis

Vassaki

Panagopoulos

et al. 2013

Trans. Emerging Tel. Tech.

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Cognitive radio (CR) technology is a revolutionary wireless communication paradigm that targets at the efficient and flexible utilization of the limited radio spectrum resource. This paper considers a spectrum underlay CR system operating in a fading environment, where the secondary users (SUs) have specific communication quality requirements. In this system, the unlicenced SUs may coexist with the licenced primary users, as long as the average interference‐power that they cause to the primary users does not exceed a threshold value.The concept of spatial correlation (cross‐correlation) of Nakagami‐m fading channels is introduced in the quality of service‐driven CR system. Specifically, we present a power allocation scheme that aims at maximising the SU's effective capacity, and we study the effects of the spatial channel correlation on the performance of the proposed scheme. In order to investigate thoroughly the impact of fading correlation, two different scenarios are studied, depending on which links are considered correlated, the receive correlation model and the transmit correlation model. The performance of the proposed allocation scheme is evaluated through simulations. Finally, the effects of spatial channel correlation for different system requirements and scenarios are presented and discussed. Copyright © 2013 John Wiley & Sons, Ltd.

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Performance of cognitive radio networks with maximal ratio combining over correlated Rayleigh fading

Cited by 6 publications

References 17 publications

On the Performance of Cooperative Spectrum Sensing in Random Cognitive Radio Networks

On the Performance of Cooperative Spectrum Sensing in Random Cognitive Radio Networks

Performance analysis comparison of transmit antenna selection with maximal ratio combining and orthogonal space time block codes in equicorrelated Rayleigh fading multiple input multiple output channels

Effects of spatial correlation on QoS‐driven power allocation over Nakagami‐m fading channels in cognitive radio systems

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