Analytical level crossing rates and average fade durations for diversity techniques in Nakagami fading channels

Iskander, C.-D.; Mathiopoulos, P. Takis

doi:10.1109/tcomm.2002.801465

Cited by 107 publications

(19 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A novel method for evaluating the level-crossing rate (LCR) and average fade duration (AFD) over a single Nakagami-m fading channel was proposed in [2]. The signal-to-noise ratio (SNR) probability density function (PDF), LCR and AFD of diversity reception combined over several independent and identically distributed (IID) Nakagami-m fading channels were studied in [3] and [4]. Although the derivations in [3] and [4] arrived at closed-form second-order statistics, they exploited a strong assumption that Nakagami-m fading channels are IID.…”

Section: Introductionmentioning

confidence: 99%

Optimum Combiner for Spatially Correlated Nakagami-m Fading Channels

Lin

Poor

2021

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

This paper proposes a novel optimum combiner that raises the time-averaged signal-to-interference-plus-noise ratio (SINR) for maximal-ratio combining (MRC) reception over spatially correlated Nakagami-m fading channels. By exploiting the principal component analysis (PCA) with eigenvalue decomposition (EVD) of the covariance matrix analytically evaluated offline, a complete set of orthonormal basis functions can be obtained. A decorrelation process analyzes and then projects the received signal into the space spanned by the basis functions. In accordance with the theorem of irrelevance, a principal component selection combining (PCSC) method is proposed to remove components in a few dimensions in which SINRs are considered low to raise the resulting time-averaged SINR on the subsequent MRC reception. The proposed technique also avoids noise enhancement occurring with MRC reception in the scenario where noises on different branches are correlated. The SINR distribution, level-crossing rate (LCR) and average fade duration (AFD) are derived. Based on a novel scattering model interpretation, a simulator consisting of spatially correlated Nakagami-m fading channels is developed according to the analytically evaluated covariance matrix. Computer simulations show that the proposed optimum combiner not only decreases interference and noise from the irrelevant subspace to achieve higher time-averaged SINR and lower AFD but also significantly reduces the complexity required for subsequent signal processing.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimum Combiner for Spatially Correlated Nakagami-m Fading Channels

Lin

Poor

2021

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

show abstract

“…The average level crossing rate (LCR) is a measure [12] that clearly reflects the performances of fading affected system and is used for modeling of wireless communication systems. LCR is related to criterion used to assess error probability of packets of distinct length [4], and to determinate parameters of equivalent channel, modeled by a Markov chain with defined number of states.…”

Section: Level Crossing Rate Of Sc Receiver Output Signal Envelopementioning

confidence: 99%

Level Crossing Rate of Macrodiversity System in the Presence of Multipath Fading and Shadowing

Jakšić¹,

Stefanović²,

Stefanović³

et al. 2015

RADIOENGINEERING

View full text Add to dashboard Cite

“…Two most important second-order statistical measures are the LCR and the AFD. They are related to the criterion that can be used to determine parameters of equivalent channel, modelled by the Markov chain with the defined number of states and according to the criterion used to assess error probability of packets of distinct length [19].…”

Section: Second-order Statisticsmentioning

confidence: 99%

Second-order statistics of selection macro-diversity system operating over Gamma shadowed κ-μ fading channels

Panić¹,

Stefanović

Petrović³

et al. 2011

J Wireless Com Network

View full text Add to dashboard Cite

In this article, infinite-series expressions for the second-order statistical measures of a macro-diversity structure operating over the Gamma shadowed -μ fading channels are provided. We have focused on MRC (maximal ratio combining) combining at each base station (micro-diversity), and selection combining (SC), based on output signal power values, between base stations (macro-diversity). Some numerical results of the system's level crossing rate and average fading duration are presented, in order to examine the influence of various parameters such as shadowing and fading severity and number of the diversity branches at the micro-combiners on concerned quantities.

show abstract

Analytical level crossing rates and average fade durations for diversity techniques in Nakagami fading channels

Cited by 107 publications

References 30 publications

Optimum Combiner for Spatially Correlated Nakagami-m Fading Channels

Optimum Combiner for Spatially Correlated Nakagami-m Fading Channels

Level Crossing Rate of Macrodiversity System in the Presence of Multipath Fading and Shadowing

Second-order statistics of selection macro-diversity system operating over Gamma shadowed κ-μ fading channels

Contact Info

Product

Resources

About