Channel estimation and link level evaluation of adaptive beamspace MIMO systems

Μαλιάτσος, Κωνσταντίνος; Vasileiou, Panagiotis N.; Kanatas, Αthanasios G.

doi:10.1109/vitae.2013.6617075

Cited by 4 publications

(10 citation statements)

References 11 publications

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“…This paper presents and extends the results of [8] provided for a 3-element ESPAR system with the use of the more efficient and flexible 5-element ESPAR antenna. An implementable beamspace transceiver chain is proposed and a link-level simulator is developed.…”

Section: Introductionmentioning

confidence: 71%

“…Gram-Schmidt. The analytical expressions for the 5-element ESPAR antenna can be found in [5] and for the 3-element ESPAR in [8].…”

Section: Bs Mimo System Model and Pattern Adaptationmentioning

confidence: 99%

“…This is caused as a mathematical reaction of the SVD in the presence of powerful noise. Nevertheless the total squared error of H bs will remain relatively low because Interfering patterns for the example (13 dB) c) Interfering patterns for the example (7 dB), [8] the term Ξ Ξ Ξ H u H bs Ξ Ξ Ξ v of (25) has now significant power and opposes the error increase. In Fig.5b, a typical case is presented where the second interfering pattern does not aim towards the same direction with the first pattern and therefore, the effect of the estimation error that occurs is practically zero.…”

Section: Use Of the Estimate For Pattern Reconfigurationmentioning

confidence: 99%

“…In fact the performance of the estimator seems to be adequate despite of the increased by 7 dB noise level for the 5-element system and 4.77 dB for the 3-element system. Results for the 3-element BS-MIMO are also provided in [8]. Nevertheless, it must be noted that: a) in [8] only QPSK modulation is used, therefore the spectral efficiency remains low, while in Fig.…”

Section: Evaluation Of Bs-mimo Through Simulationmentioning

confidence: 99%

“…Perfect channel state information in both transmitter and receiver was assumed introducing an adaptation scheme similar with the SVD precoding in the conventional MIMO. Despite the fact that the results on pattern reconfiguration with the use of ESPAR antennas [7] are quite promising and that the achievable ergodic capacity in the beamspace domain exceeds the equivalent results from conventional MIMO architectures, no attempt to evaluate the link level performance of BS-MIMO transceivers with the use of realistic reception algorithms and propagation conditions was made until the work presented in [8].…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of Beamspace MIMO Systems with Channel Estimation in Realistic Environments

Μαλιάτσος

Vasileiou

Kanatas

2014

JCSM

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Beamspace MIMO (BS-MIMO) systems have been recently proposed as a means to address the two key weaknesses of conventional MIMO systems: the antenna size and the need for multiple RF chains. BS-MIMO transmission is supported by the Electronically Steerable Passive Array Radiators (ESPAR) with a single active and multiple parasitic elements. The main objective is to develop efficient MIMO multiplexing schemes that use only one Radio Frequency (RF) chain and simultaneously maintain extremely small antenna size. Moreover, the recent research results have shown that BS-MIMO systems have increased multiplexing and beamforming capabilities and for small antenna sizes clearly outperform equivalent conventional systems in terms of system capacity. Nevertheless, research on BS-MIMO has been focusing on the study of the ESPAR antenna properties that facilitate beamspace transmission and the theoretical analysis of the ergodic capacity provided by the aerial degrees of freedom (aDoF) of the beamspace channel. Recently, the first steps have been made to design and evaluate practical BS-MIMO systems. This paper presents extended results of the first attempt to design practical and realistic BS-MIMO transmission and reception schemes and it specifically focuses on channel estimation techniques for BS-MIMO systems with adaptive pattern reconfiguration.Adaptation of the basic least-squares (LS) and minimum mean squared error (MMSE) estimators for the beamspace radio channels is performed and the algorithms are incorporated in an adaptive Singular Value DecompositionJournal of Cyber Security, Vol. 2 No. 3 & 4, 265-290. doi: 10.13052/jcsm2245-1439

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Section: Introductionmentioning

confidence: 71%

“…Gram-Schmidt. The analytical expressions for the 5-element ESPAR antenna can be found in [5] and for the 3-element ESPAR in [8].…”

Section: Bs Mimo System Model and Pattern Adaptationmentioning

confidence: 99%

Section: Use Of the Estimate For Pattern Reconfigurationmentioning

confidence: 99%

Section: Evaluation Of Bs-mimo Through Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Performance Evaluation of Beamspace MIMO Systems with Channel Estimation in Realistic Environments

Μαλιάτσος

Vasileiou

Kanatas

2014

JCSM

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Channel estimation and performance analysis of beamspace MIMO systems

Zhou

Ratnarajah

Xue

2014

2014 European Conference on Networks and Communications (EuCNC)

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Recently, a novel implementation of multiple-input multiple-output (MIMO) system has been introduced, namely beamspace MIMO, which is potentially able to integrate the concept of standard MIMO into mobile devices, with respect to their size limitations. In this paper, circuit theory is introduced to study a beamspace MIMO system with electronically steerable parasitic array radiator (ESPAR) antennas, which simplifies the analysis of previous researches on this topic. Furthermore, a channel estimation technique dedicated to beamspace MIMO is addressed, and an efficient training sequence is designed to estimate this channel. Bit error rate (BER) performance and meansquare-error (MSE) about channel estimation are investigated in detail. Simulation results show that the proposed optimal training sequence can achieve effective channel estimation for beamspace systems which also verifies our analytical results.

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