Comparison of MIMO Over Different Fading Channels with and without Channel State Information

Sharma, Purnima K.; k, Chaitanya Anand; Priya, Ved; Raju, G R P Krishnam; Sai, K Venkat

doi:10.1109/iceca.2018.8474831

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The authors analyze spectral efficiency in systems composed of multiple cells considering various channel estimators. In [ 17 ], the performance of MIMO systems is analyzed considering different types of fading. Specifically, Rayleigh, Rice, Nakagami and Weibull statistical distributions are employed in this work for fading modeling.…”

Section: Introductionmentioning

confidence: 99%

A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems

Mora

Garzón

Cacuango

et al. 2022

Sensors

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For the receiver of multiple-input multiple-output (MIMO) systems, linear detectors are an interesting option due to their good performance and low complexity. Nevertheless, MIMO systems lose diversity in exchange for eliminating interference when linear detectors are used. Aiming to maintain the system diversity while mitigating interference between users, this work proposes a scheduling scheme for the uplink of multiuser MIMO (MU-MIMO) systems that employ A antennas and the zero-forcing (ZF) detector at the receiver in the base station (BS). The channel model includes Rician fading and additive white Gaussian noise (AWGN) in an imperfect channel estimation scenario. The proposed scheme selects U users from a group of Ut users to transmit simultaneously, so that the signal-to-noise ratio (SNR) is maximized. For this, an exact expression to evaluate the SNR of the users is obtained. With this result, the scheduling strategy is proposed. Results show that as Ut increases, the outage probability (OP), and the bit error rate (BER) decrease as the system diversity increases, even when the system is completely loaded, i.e., when U=A. Moreover, it is shown that the scheduling scheme counteracts the imperfect channel estimation effects as Ut increases. Finally, the proposed scheme is tested in presence of an external eavesdropper trying to decode the information sent by the users. The results show that the presented proposal allows for a reduction of the secrecy-outage-probability (SOP) as Ut increases.

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Section: Introductionmentioning

confidence: 99%

A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems

Mora

Garzón

Cacuango

et al. 2022

Sensors

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“…The study in [14], shows that Nakagamim provides better bit error rate performance than Rician. The study in [15] shows that the capacity of Nakagami-m fading channels drastically increases compared to other Rayleigh, Rician and Weibull fading channels. The study in [16], shows the SS uses different methods with known and unknown noise levels.…”

Section: Introductionmentioning

confidence: 99%

Power allocation optimization for fading channels in cognitive radio networks

Js¹,

Ujjinimatad²

2019

IJACR

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The radio resource allocation in cognitive radio networks is an essential problem where the secondary users (SUs) use the spectrum allocated to primary users (PUs) without causing much interference to PUs. This paper studies optimal power and bandwidth allocation in a cognitive radio network under Rician and Nakagami-m fading channels. The performance metric for the network used is the ergodic-capacity of all the SUs. Further, this paper investigates the optimal power allocation schemes to achieve the primary capacity bounds of a secondary network with Rician and Nakagami-m fading channels. Specifically, the ergodic-capacity is considered. The methodology used involves deriving closed-form results for both Rician and Nakagami-m scenarios. Besides, the peak/average transmit-power constraints at the SUs and the peak/average interference power constraint imposed by the PU. The equations of optimal power allocations are also formulated under peak-power and peak-interference constraints. Further, the analysis is done for a network of SUs. Simulation results depicted with figures and tables show that the optimal power and bandwidth allocation for Rician and Nakagami-m fading channels. The investigation and analysis on optimal power and bandwidth allocation can be used for future reference of resource allocation in the cognitive radio networks over Rician and Nakagami-m fading channels.

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Comparison of MIMO Over Different Fading Channels with and without Channel State Information

Cited by 2 publications

References 9 publications

A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems

A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems

Power allocation optimization for fading channels in cognitive radio networks

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