Multiantenna Systems for MIMO Communications

Multiple-antenna systems, also known as multiple input multiple-output (MIMO) radio, can improve the capacity and reliability of radio communication systems. In this paper, the concept of MIMO systems and the some simulation results for the performance of maximum ratio combining (MRC) are introduced for 16-quadrature amplitude modulation (16-QAM). Also, we introduce the antenna selection method to reduce the complexity of MlMO systems and present results for this method with MRC system when 16-QAM modulation is employed. We observed the differences in performance, cost, and complexity of the full complexity MlMO system and the system with antenna selection.Index Terms-Multiple-input multiple-output (MIMO) systems, maxinmm ratio combining (MRC), antenna selection, 16-quadrature amplitude modulation (QAM).

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“…The process consists of sending different symbols at the same time and using the same frequency but from different antennas [3].…”

Section: A Spatial Multiplexing Techniquementioning

confidence: 99%

“…Diversity technique, also referred to as space-time coding (STC) techniques, are used to increase the signal strength of the transmitted symbols and therefore to improve the signal to-noise ratio (SNR) [3]. The process consists of sending encoded copy of same symbol over the channel, from different antennas.…”

Section: B Diversity Techniquementioning

confidence: 99%

Performance of antenna selection for maximum ratio combining MIMO system

Al-Zahrani

Al-Mutairi

Al-Hodhayf

et al. 2011

2011 IEEE 3rd International Conference on Communication Software and Networks

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“…The normalised far-field radiation pattern ሺߠǡ ߶ሻ due to the ݅ ௧ input port of the MPA can be expressed in a modal expansion form as in [1] and [3] where ࢽ ሺߠǡ ߶ሻ ‫א‬ ‫ܥ‬ ଶൈଵ forms a set of orthonormal spherical harmonic functions and ఉఈ is the spherical mode expansion coefficients matrix as described in [2] and [6]. The scattering model of an MPA can then be expressed as…”

Section: A General Model Of An Mpamentioning

confidence: 99%

“…Assuming a perfect match between the antenna impedances and characteristic reference impedances at all the ports, the ሺߠǡ ߮ሻ ൌ ఉఈ ೕ ஶ ୀଵ ࢽ ሺߠǡ ߶ሻ (1) elements of the MIMO channel matrix, , can be physically interpreted as [1] …”

Section: A General Model Of An Mpamentioning

confidence: 99%

MIMO antenna configuration for Femtocell application

Ndikumasabo

2009

2009 Loughborough Antennas &Amp; Propagation Conference

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Recent advances in the development of mobile applications have led to a need for mobile broadband platforms which support the capacity that these applications require. An investigation of possible antenna configurations that would be compatible with MIMO systems suitable for Femtocell applications is presented. A MIMO configuration of up to 6×2 antenna elements is modelled with the use of HFSS. Its performance is measured by means of the ideal-channel capacity increase it provides compared to a SISO architecture. The performance of the same MIMO configuration is then successfully modelled in Epsilon™ (Roke's own channel modelling tool) with the use of a non-ideal indoor model. The simulations show that with the proposed configuration, it is possible to achieve a two-fold capacity increase compared to a SISO architecture in both channel conditions.

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“…The DG is the slope of the error probability curve in terms of the received SNR in a log-log scale. However, the DG can also be defined as the increment of the SNR at a given probability, normally % or % [23]. Such DG can easily be calculated by looking at the cumulative distribution function (CDF) curves of the SNR, and comparing the combined SNR using some specific diversity technique with the SNR of an un-coded SISO communication system.…”

mentioning

confidence: 99%