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This contribution addresses the blind identification of Multiple Input Multiple Output (MIMO) linear FIR systems having a number of inputs less than the number of outputs. Recent publications have proposed an efficient second order identification method in the Single Input Multiple Output (SIMO) case. Based on a sub-space analysis, it allows a perfect recovery of the system parameters and excitation...
In order to minimize pollutant emissions and more specifically nitrogen oxides, a decentralized multivariable robust control has been designed for the airpath of a Diesel engine with a turbocharger, an intake throttle and Exhaust Gas Recirculation. The control system is designed with a fractional-order approach called CRONE (Commande Robust d'Ordre Non Entier) control, via a MIMO open-loop transfer...
This paper proposes the model-free multivariable controller tuning method for the H∞ model matching problem based on spectral analysis. This method provides a controller without the plant model by using only Input/Output data. It evaluates the H∞ norm of the difference between the reference model and the achieved closed-loop system. Therefore, this method can design a controller in consideration of...
In many applications of system identification, output measurements are available, but measurements of the input are not available. In these cases, sensor-only identification techniques are needed. In the present paper, we define a discrete-time MIMO pseudo transfer function (PTF) between sensor measurements in a sampled-data system with multiple excitation signals. We show that the MIMO PTF does not...
This paper presents a detailed concept of a very flexible Field Programmable Gate Array (FPGA)-based powerline channel emulator. Several emulation scenarios, e. g. MIMO-PLC (Multiple Input Multiple Output), neighborhood network, hidden node or VDSL (Very High Speed Digital Subscriber Line) coexistence scenarios will illustrate the need of such an emulator. Furthermore, the paper describes the data...
To avoid the problem of estimating a general interactor, an improved computational method for user-specified benchmark is presented in this paper. The improved user-specified benchmark together with the historical benchmark are then specified as two parallel benchmarks to form an integrated performance assessment strategy, which can detect any change in the performance of a control system and identify...
In this paper, the relation between Input-output pairing and minimum variance (MV) index as a performance index is studied. Control structure selection or the input-output pairing problem is a key step in designing decentralized controllers for multivariable. The Relative Gain Array (RGA) is an important tool for the control structure selection procedure. In this study, RGA is calculated and decentralized...
In this article, a series of measurements of noise and transfer function characteristics of a three-phase electrical infrastructure is made to investigate the infrastructure's advantage over a single-phase one. The system considered was one where the transmitter makes use of all three phases but the receiver is connected to only one. The results corroborate previous work by showing that periodic impulsive...
Power Line Communications (PLC) is used for information exchange over the lines installed for delivering the electrical power. Inhome PLC is a technology which delivers telecom services to every corner of a household through already existing electrical wiring. In recent years, PLC has emerged as a potential candidate for domestic high bit rate services. The current inhome PLC technology, based on...
In this paper, we study the optimal tracking performance of multiple-input multiple-output (MIMO), linear and time-invariant system over a parallel additive white noise (AWN) channel. We adopt the power of the tracking error as a measure of the performance and examine the best achievable performance by all two-parameter stabilizing controllers. In addition, we investigate a scaling scheme of the channel...
In this paper we show that the variance of estimated parametric models for open loop Multiple-Input Multiple-Output (MIMO) systems obtained by the prediction error method (PEM) satisfies a fundamental integral limitation. The fundamental limitation gives rise to a multivariable `waterbed' effect.
This paper presents the use of the common-mode signal in digital-subscriber-line (DSL) transmission. The DSL binder's metallic sheath is used as a common reference to obtain reliable channels for the common-mode signals. The direct and crosstalk channels for the common-mode signal are obtained using multi-conductor transmission line theory, and the data-rate improvement by exploiting these extra dimensions...
Li and Xia have recently investigated the design of space-time codes that achieve full spatial diversity for asynchronous cooperative communications. They show that certain of the binary space-time trellis codes derived from the Hammons-El Gamal stacking construction are delay tolerant and can be used in the multilevel code constructions by Lu and Kumar to produce delay tolerant space-time codes for...
Effects of improved channel estimation are studied for a proposed IEEE 802.11n OFDM MIMO system. Three channel estimation methods are considered: maximum likelihood (ML), time-domain truncation (TDT) and model-based (MB). TDT and MB are particularly useful when the channel delay spread is short. For an MMSE receiver, MB shows a 1-2.5 dB improvement over ML on the packet error rate performance for...
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