The Gallager's random coding error exponent for space-time block codes (STBC) over multiple-input multiple-output (MIMO) block-fading channels, with Gaussian input distribution, is investigated. Gallager's err...
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The Gallager's random coding error exponent for space-time block codes (STBC) over multiple-input multiple-output (MIMO) block-fading channels, with Gaussian input distribution, is investigated. Gallager's error exponent can be used to determine the required codeword length to achieve a prescribed error probability at a given rate below the channel capacity. We first provide new, analytical expressions for Gallager's exponent of STBC systems over η-μ fading channels. The Shannon capacity and cutoff rate, which can be directly derived from Gallager's exponent, are further examined. In order to get additional insights, a high signal-to-noise ratio analysis is pursued to investigate the effects of coherence time and codeword length on the error probability. For the sake of completeness, we provide the link to previous known results on Rayleigh and Nakagami-m fading channels.
The supervisory control theory of discrete event systems modeled as finite state machines (FSMs) have been studied for many years. However, the problem of state explosion in the existing theories obstructs its widespr...
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In this paper, the discrete-time exponential forgetting factor observer for state affine systems is specialized for the joint estimation of state and parameters, leading to an adaptive observer in which the decay rate...
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In this paper, the discrete-time exponential forgetting factor observer for state affine systems is specialized for the joint estimation of state and parameters, leading to an adaptive observer in which the decay rate...
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In this paper, the discrete-time exponential forgetting factor observer for state affine systems is specialized for the joint estimation of state and parameters, leading to an adaptive observer in which the decay rates of the estimation errors for the two distinct objects to be estimated can be disjoined. Experimental results for the adaptive observation of rotor time constant and stator resistance of an induction motor are presented as example of application.
In this paper, we develop a dissipativity-preserving model reduction method based on a generalized singular perturbation approximation. This model reduction framework can deal with not only standard singular perturbat...
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ISBN:
(纸本)9781467357159
In this paper, we develop a dissipativity-preserving model reduction method based on a generalized singular perturbation approximation. This model reduction framework can deal with not only standard singular perturbation approximation but also projection-based model reduction as a special case. To develop such a model reduction method, we investigate a condition under which system dissipativity is appropriately preserved through the approximation. Moreover, deriving a novel factorization of the error system in the Laplace domain, we derive an a priori error bound in terms of the H_2-norm. The efficiency of the model reduction is shown through an example of interconnected second-order systems.
This paper proposes a singular perturbation approximation that preserves system passivity and an interconnection topology among subsystems. In the first half of this paper, we develop a singular perturbation approxima...
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ISBN:
(纸本)9781479901777
This paper proposes a singular perturbation approximation that preserves system passivity and an interconnection topology among subsystems. In the first half of this paper, we develop a singular perturbation approximation valid for stable linear systems. Using the relation between the singular perturbation and the reciprocal transformation, we derive a tractable expression of the error system in the Laplace domain, which provides a novel insight to regulate the approximating quality of reduced models. Then in the second half, we develop a structured singular perturbation approximation that focuses on a class of interconnected systems. This structured approximation provides a reduced model that not only possesses fine approximating quality, but also preserves the original interconnection topology and system passivity.
Abstract Background UK legislatures are at different stages in the policy process for introducing a minimum price for alcohol. Although there is evidence abou t the effectiveness of such policies, political and public...
Abstract Background UK legislatures are at different stages in the policy process for introducing a minimum price for alcohol. Although there is evidence abou t the effectiveness of such policies, political and public concern exists about the potential effects on low-income drinkers. We present appraisals of the effects of a £0·45 minimum unit price (MUP; 1 unit=8g/10mL ethanol) policy in England in 2014–15 across the income and socioeconomic distributions. Methods We undertook policy appraisals using the Sheffield Alcohol Policy Model (SAPM version 2.6), a causal, deterministic, epidemiological model. SAPM accounts for differential alcohol purchasing and consumption preferences for population subgroups defined, using self-reported survey data, by age, sex, consumption level, and income or socioeconomic group. We derived volumes purchased and prices paid for ten alcoholic beverage categories (beer, cider, wine, spirits, and ready-to-drink beverages [RTDs ] , purchased in the on trade [eg, bars ] or off trade [eg, shops ] ) from household-level 2-week spending diaries. A 10 × 10 price elasticity matrix was estimated to describe the relation between price changes and purchasing changes (assumed to represent consumption changes). After a policy change, the elasticity matrix was used to adjust individual-level survey data on self-reported mean weekly and peak daily alcohol consumption. We modelled resulting effects on mortality and disease prevalence using functions relating consumption measures to risk of having 47 chronic or acute disorders wholly or partly attributable to alcohol. Baseline mortality and morbidity rates were those reported for England and Wales in 2005 by the North West Public Health Observatory. These rates are adjusted to account for socioeconomic variability in mortality and morbidity risk with Office for National Statistics socioeconomic group-specific alcohol-related mortality data for 2001–03. Findings On average, moderate drinkers purchase 36 b
We present a method for the calculation of approximate explicit solutions to constrained time-optimal control problems for nonlinear discrete-time systems. We aim to pre-compute offline a low complexity control law th...
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The paper deals with the predictive control synthesis for a Pantograph-Catenary (PAC) system. The main difficulty of the control design resides in the time-varying characteristics of the dynamics modeled by a chain of...
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This paper proposes a DSPF2812 based 32-bit micro-controller is used to to generate PWM waveform required to switch IPM DRIVE, by using fuzzy logic controller to control dc motor fed by AC/DC (IPM) converter. The fuzz...
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