Fading correlations in wireless MIMO communication systems

Ivrlač, Michel T.; Utschick, Wolfgang; Nossek, Josef A.

doi:10.1109/jsac.2003.810348

Cited by 167 publications

(109 citation statements)

References 12 publications

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“…Then, applying Theorem 11 in Appendix II to (20), we obtain where and are the characteristic coefficients of and , respectively. The effects of the spatial correlation and the number of effective scatterers on the SEP performance in MISO channels can be ascertained by referring to Fig.…”

Section: Miso Double Scatteringmentioning

confidence: 99%

“…In [20], the so-called stochastic rank deficiency-meaning that the channel is rank deficient due to fading correlation, i.e., the correlation matrices have zero eigenvalues-was deemed as an important feature when dealing with fading correlation. However, this form of channel degeneracy cannot cover the case where the channel exhibits rank deficiency even when fading is uncorrelated.…”

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confidence: 99%

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MIMO Diversity in the Presence of Double Scattering

Shin

Win

2008

IEEE Trans. Inform. Theory

168

104

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Abstract-The potential benefits of multiple-antenna systems may be limited by two types of channel degradations-rank deficiency and spatial fading correlation of the channel. In this paper, we assess the effects of these degradations on the diversity performance of multiple-input multiple-output (MIMO) systems, with an emphasis on orthogonal space-time block codes (OSTBC), in terms of the symbol error probability (SEP), the effective fading figure (EFF), and the capacity at low signal-to-noise ratio (SNR). In particular, we consider a general family of MIMO channels known as double-scattering channels-i.e., Rayleigh product MIMO channels-which encompasses a variety of propagation environments from independent and identically distributed (i.i.d.) Rayleigh to degenerate keyhole or pinhole cases by embracing both rank-deficient and spatial correlation effects. It is shown that a MIMO system with n T transmit and n R receive antennas achieves the diversity of order n T n S n R = max(n T ; n S ; n R ) in a double-scattering channel with n S effective scatterers. We also quantify the combined effect of the spatial correlation and the lack of scattering richness on the EFF and the low-SNR capacity in terms of the correlation figures of transmit, receive, and scatterer correlation matrices. We further show the monotonicity properties of these performance measures with respect to the strength of spatial correlation, characterized by the eigenvalue majorization relations of the correlation matrices.Index Terms-Channel capacity, diversity, double scattering, fading figure, keyhole, multiple-input multiple-output (MIMO) system, orthogonal space-time block code (OSTBC), spatial fading correlation, symbol error probability (SEP).

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Section: Miso Double Scatteringmentioning

confidence: 99%

mentioning

confidence: 99%

MIMO Diversity in the Presence of Double Scattering

Shin

Win

2008

IEEE Trans. Inform. Theory

168

104

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“…In general, an array gain is defined as the ratio between the received power in massive MIMO (P Massive MI MO re ) and the received power in MIMO system (P MI MO re ) [28], which is given by…”

Section: Array Gainmentioning

confidence: 99%

Analysis and Evaluation of Performance Gains and Tradeoffs for Massive MIMO Systems

Jabbar

2016

Applied Sciences

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Abstract:Massive MIMO technique offers significant performance gains for the future of wireless communications via improving the spectral efficiency, energy efficiency and the channel quality with simple linear processing such as maximum-ratio transmission (MRT) or zero-forcing (ZF) by providing each user a large degree of freedom. In this paper, the system performance gains are studied in a multi-cell downlink massive MIMO system under the main considerations such as perfect channel estimation, imperfect channel estimation and the effect of interference among cells due to pilot sequences contamination. Then, mathematical expressions are derived for these gains i.e., spatial multiplexing gain, array gain and spatial diversity gain. After that, essential tradeoffs among these gains are considered under the effect of non-orthogonal interference, these tradeoffs are: spatial diversity gain vs. spatial multiplexing gain and array gain vs. spatial multiplexing gain. Simulation results show that the unbounded number of base station antennas boosts the array gain through concentrating the energy to spatial directions where users are sited, hence diminishing loss in array gain due to pilot contamination. The simulation results reveal also that massive MIMO strengthens the spatial multiplexing gain through increasing the number of served users via the same system resources in spite the effect of inter-cell interference. Finally, the spatial diversity gain is measured in term of outage probability and the simulation results show that raising the number of antennas will improve the outage probability. Meanwhile increasing the number of served users will lead to degrade the outage probability per user due to non-orthogonal interference from other cells.

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“…Various works have examined the impact of spatial correlation on the performance of communication systems by means of experimentation [30], [31], modeling [32], [33] and theoretical analysis [34]- [40]. Numerous works have characterized the effect of channel correlation in the performance and capacity of the wireless channels by mathematical analysis [34], [35], further focusing on linear receivers [36], [37], [40] using mainly random matrix theory [41], [42], [43].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Compensation Network in a Correlated-based Channel using Angle of Arrivals

Ampoma¹,

Anane²,

O.-B³

et al. 2016

ijacsa

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Abstract-We explore combined effect of spatial correlation and mutual coupling matrix, and its subsequent effects on performance of multiple input multiple output (MIMO) systems After the decoupling process. We will also look at a correlation based stochastic channel model with the linear antenna arrays as the signal source. For the purpose of understanding, it is assumed that fading is correlated at both transmitter and receiver sides, in spite of the fact that the decoupling network enhances isolation between Receiving antenna array. In this paper, we model the transmit the antenna array in CST Microwave Studio, as a uniform linear Array with monopoles as antenna elements. On the receiving side, the scattering parameters of the coupled and decoupled monopole Array are measured in an anechoic chamber. The theoretical analysis and simulation results show the joint dependency of the system capacity on an angle of arrival (AoA) and antenna element spacing, with enhanced system performance at reduced AoAs with Increased antenna element separation. Consequently, essential benefits of MIMO system performance can be achieved with an efficient decoupling network while boosting the signal sources by adding further antenna elements.

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Fading correlations in wireless MIMO communication systems

Cited by 167 publications

References 12 publications

MIMO Diversity in the Presence of Double Scattering

MIMO Diversity in the Presence of Double Scattering

Analysis and Evaluation of Performance Gains and Tradeoffs for Massive MIMO Systems

Analysis of Compensation Network in a Correlated-based Channel using Angle of Arrivals

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