General Order Selection Combining for Nakagami and Weibull Fading Channels

Kwan, R.; Leung, Cyril

doi:10.1109/twc.2007.05810

Cited by 14 publications

(5 citation statements)

References 24 publications

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“…Under non-identical fading, the general form for the PDF f Gmax (g) is given by [93,121] f Gmax (g) =…”

Section: A2 Derivation Of P F Scmentioning

confidence: 99%

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Performance Analysis of Cognitive Radio Networks with Diversity and Faded Channels

Hussain¹

2023

Preprint

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This dissertation presents new approaches for cognitive radio networks that combat fading effects and improve detection accuracy. We propose an advance framework for performance analysis of cooperative spectrum sensing over non-identical Nakagami- A detect-amplify-and-forward strategy is proposed to mitigate bandwidth requirements of relaying local observations to a fusion center. The end-to-end performance of a relay-based cooperative spectrum sensing over independent identically distributed Rayleigh fading channels is also investigated in this dissertation. Specifically, we aim to incorporate sensing time, end-to-end SNR, and end-to-end channel statistic into the performance analysis of cooperative CR networks. We also propose a cluster-based cooperative spectrum sensing approach to overcome the bandwidth limitations of the reporting links. The approach reduces the number of reporting terminals to a minimal reporting set and replaces the global fusion center by a local fusion center to mitigate the destructive channel conditions of global relaying channels. A new approach is proposed to select the location of the local fusion center using the general center scheme in graph theory. We aim to show that multipath fading on relaying channels yields similar performance degradations as multipath fading on sensing channels. With the detect-amplify-and forward strategy, refraining the heavily faded relays improves the detection accuracy. A gain of 3 dB is achieved by switching from amplify-and-forward strategy to detect-amplify-and-forward strategy with 3 cooperative users. Compared to the non-cooperative spectrum sensing, a gain of up to 8 dB is achieved with 4 cooperative users and equal gain combining receiver. Similar experimental set up but with selection combining receiver, a gain of 5 dB is achieved.

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“…Under non-identical fading, the general form for the PDF f Gmax (g) is given by [93,121] f Gmax (g) =…”

Section: A2 Derivation Of P F Scmentioning

confidence: 99%

“…Performance analysis of wireless communication networks usually involves compli-cated and cumbersome statistical methods. Several statistical models have been introduced in the literature to describe the fading envelope of the received signal [78,[91][92][93][94][95][96].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Cognitive Radio Networks with Diversity and Faded Channels

Hussain¹

2023

Preprint

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“…However, the best relay might be practically unavailable. Take multiuser scheduling as an example [15]. Consider the downlink in a cellular system.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, other users may resort to the second best relay or the N th best relay. Another scenario where the performance of the N th best relay is needed is in the evaluation of the performance loss when the destination (or the source) makes an error in selecting the best relay [15]. More recently, Ikki and Ahmed [16] applied the moment generating function (MGF)-based approach to analyze the performance of the N th best-relay scheme over Rayleigh fading channels.…”

Section: Introductionmentioning

confidence: 99%

Asymptotic performance of amplify‐and‐forward cooperative diversity networks with the N^th best relay over Rician fading channels

Chu

Chang

Lee

2012

Trans. Emerging Tel. Tech.

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This paper analyzes and derives the asymptotic symbol error rate expression of amplify‐and‐forward cooperative communications with the Nth best relay over independent and non‐identical Rician fading channels. Rician fading takes the line‐of‐sight effects into account and often exists in microcellular mobile and wireless mesh networks. In practice, the Nth best relay is selected when the best relay is unavailable because of fairness and load balancing issues. Performance analysis reveals that the diversity gain of the Nth best‐relay scheme equals R–N+2, while the best relay and all‐participate schemes achieve the diversity gain of R+1, where R is the number of relays. Simulation and numerical evaluation show the tightness of the asymptotic symbol error rate expression and the accuracy of our theoretical analysis. Copyright © 2012 John Wiley & Sons, Ltd.

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“…However, few researches on Weibull fading MIMO channels are available in the open literature. Until very recently, the topic of communications over Weibull fading channels began to receive renewed interest, due to the fact that it is a flexible model providing a very good fit to experimental fading channel measurements for both indoor and outdoor environment [6]. The capacity of STBCs over Weibull fading MIMO channels under different adaptive transmission techniques has seldom been considered in the literature because of the complexity in obtaining closed-form expressions for either the outage capacity or the ergodic capacity.…”

Section: Introductionmentioning

confidence: 99%

Capacity of Orthogonalized Weibull MIMO Channels Under Different Adaptive Transmission Techniques

Xiao

Ouyang

Nie

et al. 2009

Wireless Pers Commun

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Space-time block codes (STBCs) are known to orthogonalize the multiple input multiple out (MIMO) wireless channels. In this paper, we study the capacity of STBCs over Weibull MIMO channels under three adaptive transmission techniques: optimal power and rate adaptation, optimal rate adaptation with constant transmit power and channel inversion with fixed rate, and obtain closed-form expressions for the corresponding capacity. This capacity provides an upper bound on spectral efficiency using these techniques and avoids Monte Carlo simulations. Moreover, we also examine the effects of the fading severity on the concerned quantities. The figures show that our theoretical results of channel capacity line up exactly with the simulations.

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General Order Selection Combining for Nakagami and Weibull Fading Channels

Cited by 14 publications

References 24 publications

Performance Analysis of Cognitive Radio Networks with Diversity and Faded Channels

Performance Analysis of Cognitive Radio Networks with Diversity and Faded Channels

Asymptotic performance of amplify‐and‐forward cooperative diversity networks with the N^th best relay over Rician fading channels

Capacity of Orthogonalized Weibull MIMO Channels Under Different Adaptive Transmission Techniques

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General Order Selection Combining for Nakagami and Weibull Fading Channels

Cited by 14 publications

References 24 publications

Performance Analysis of Cognitive Radio Networks with Diversity and Faded Channels

Performance Analysis of Cognitive Radio Networks with Diversity and Faded Channels

Asymptotic performance of amplify‐and‐forward cooperative diversity networks with the Nth best relay over Rician fading channels

Capacity of Orthogonalized Weibull MIMO Channels Under Different Adaptive Transmission Techniques

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Product

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Asymptotic performance of amplify‐and‐forward cooperative diversity networks with the N^th best relay over Rician fading channels