Ground handling is part of the work process of any onboard complex. The article presents a model of the process of such service, based on the queuing theory methods. The model based on the assumption that random value...
详细信息
Ground handling is part of the work process of any onboard complex. The article presents a model of the process of such service, based on the queuing theory methods. The model based on the assumption that random values describing these processes may have arbitrary distributions, which in turn affects the quality of board service. Differences in the values of quality indicators can reach in the case of different distribution laws, they can differ by an order of magnitude, which can be of significant importance when deciding on the deployment of the next point of on-board service. The fundamental importance has that are investigated not the average values of service quality indicators, but their maximum values, which are guaranteed for a predetermined proportion of the entire flow of boards arriving for service.
IP video cameras and camera modules are widely used, including in on-board equipment, due to the lack of reference to television standards for image decomposition and interface flexibility, and they are coming to repl...
详细信息
The article is dedicated to the study of peculiarities of the behavior of the envelope and instantaneous frequency of the CFSK-n-signal at the output of channel with memory caused by it frequency selective properties....
详细信息
The article is dedicated to the study of peculiarities of the behavior of the envelope and instantaneous frequency of the CFSK-n-signal at the output of channel with memory caused by it frequency selective properties. New properties and phenomena are revealed that allow to increase the efficiency of communication systems with this type of signals, built on the basis of the theory of resolution time.
The article discusses the use of analogue neural processors to solve the problem of isolating a periodic radio signal from interference. The development goal is to achieve high performance hardware recognition of sign...
详细信息
The problem of increasing the noise-proof feature of communication systems, along with increasing the communication channel capacity, is currently important. In many areas of wireless engineering (in radiolocation and...
详细信息
The problem of increasing the noise-proof feature of communication systems, along with increasing the communication channel capacity, is currently important. In many areas of wireless engineering (in radiolocation and communications for example), it becomes necessary to receive and process signals, some characteristics of which (for example, amplitude, frequency, or initial phase) are unknown. Methods of statistical radio engineering, as well as algorithms for blind signal processing, can be used to eliminate a priori uncertainty. The problem of comparative analysis of some common algorithms for blind signal processing in the tasks of separating radio signals from mixtures with interference and noise was considered. In the study, the algorithms JADE, FastICA, SOBI and AMUSE were considered. Amplitude-, frequency- and phase-shift keyed signals against the background of additive noise, impulse noise and cochannel noise were considered as useful signals. Based on the results of simulation modeling, the effectiveness of these algorithms is compared when distinguishing between several types of signals in the presence of various types of interference. The above research results can be useful when choosing a blind processing algorithm for subsequent practical application.
The article discusses the use of continuous processors to generate analog signals of a given shape in a continuous time interval. The purpose of the development is to create built-in devices for monitoring signal para...
详细信息
The article discusses the use of continuous processors to generate analog signals of a given shape in a continuous time interval. The purpose of the development is to create built-in devices for monitoring signal parameters for radio engineering systems. The main element of the generator is an analog function interpolator controlled by continuous processors. The generator's operation is based on the approximation of signal functions by its tabulated values. The signal is synthesized at conjugate time intervals by the method of forming a spline model of the function. To calculate the spline coordinates, the polynomials of Newton, Bessel and Stirling are used. The proposed approach makes it possible to create small-sized devices for synthesizing signals of a given shape using analog elements.
A well-known complex of methods for converting signals into binary digital form is shown, potential theoretically achievable boundaries of such conversions are determined. Values are calculated that indicate the value...
详细信息
A well-known complex of methods for converting signals into binary digital form is shown, potential theoretically achievable boundaries of such conversions are determined. Values are calculated that indicate the value of the code distance between the original values and those obtained after transformation. Euclidean space metric. A correspondence is established between these messages and binary code combinations in the Hamming space. It is proved that in some cases the values that determine the distance between messages and the metric are quite general and should be clarified for specific situations. Distortion minimization is suitable for cases where the minimum code distances of the primary metric space are related to the minimum code distances of the secondary metric space. And also in the article the admissible limits of such minimization are found.
The express diagnostics of multi-mode discrete-nonlinear electronic systems based on the non-harmonic spectra of their signals is considered. A new technique for constructing multidimensional non-harmonic fractional p...
详细信息
The number of electronic and service devices using GPS/Glonass/Beidow/Galileo receiver location data is continuously increasing in the modern world. This process can be attributed to the ever-decreasing cost of the el...
详细信息
This article examines the consequences of a large number of vehicles and their impact on the environment and creating a smart city to solve the transport problems of the megapolis. During the study, it was found out t...
详细信息
This article examines the consequences of a large number of vehicles and their impact on the environment and creating a smart city to solve the transport problems of the megapolis. During the study, it was found out that at the moment the most dangerous impact from the car on the environment are: the consequences of an accident; emissions of harmful substances; thermal effects; noise; vibration; wear products; problems of recycling. One of the ways to solve the problem of environmental pollution can be the development of recuperation energy in road transport.
暂无评论