Simultaneous determine of Doppler shift and group delay time using amplitude modulated chirp-signal

New method of the simultaneous measurement of the frequency dependencies of Doppler shift and group delay time of separate ionosphere modes by means of amplitude modulated chirp signal is presented in this paper. The algorithms of data processing are presented.Представлено новий метод одночасного вимірювання частотних залежностей допплерівського зсуву і часу групової затримки окремих іоносферних мод з використанням безперервного ЛЧМ сигналу з амплітудною модуляцією. Наведено порядок обробки даних під час вимірювання

Gaussian fluctuations in an ideal bose-gas -- a simple model

Based on the canonical ensemble, we suggested the simple scheme for taking into account Gaussian fluctuations in a finite system of ideal boson gas. Within framework of scheme we investigated the influence of fluctuations on the particle distribution in Bose -gas for two cases - with taking into account the number of particles in the ground state and without this assumption. The temperature and fluctuation parameter dependences of the modified Bose- Einstein distribution have been determined. Also the dependence of the condensation temperature on the fluctuation distribution parameter has been obtained.Comment: arXiv admin note: text overlap with arXiv:cond-mat/040859

Application of model of mixture of probabilistic distributions for definition of the signals of radiophysical probing

The article describes a model representation of radar probing data in form of a mixture of background and target samples, which is the sum of two random variables with very different parameters. For model development we research the behavior of the central moments of the distribution mix without assuming the distribution law form. An example it is described the detection of the signal at the output of compression system of chirp ionosonde

Simultaneous measuring of Doppler frequency shift and group delay time by means of amplitude-modulated LFM-signal

New method of the simultaneous measurement of the frequency dependencies of Doppler shift and group delay time of separate ionosphere modes by means of amplitude modulated chirp signal is presented in this paper. The algorithms for data processing are presented

Application of techniques for separating anomalous samples during the processing of SW LFM signal

The paper deals with the processing of linear frequency modulated signal of decameter waveband based on statistical approach of separating anomalous samples in experimental observations. Techniques for the rejection of narrow-band interferences and separation of desired signal have been developed on the basis of model proposed by the authors for a mixture of distributions. The specified techniques were simulated and experimentally evaluated

Application of model of mixture of probabilistic distributions for definition of the signals of radiophysical probing

Полный текст доступен на сайте издания по подписке: http://radio.kpi.ua/article/view/S0021347016080057The article describes a model representation of radar probing data in form of a mixture of background and target samples, which is the sum of two random variables with very different parameters. For model development we research the behavior of the central moments of the distribution mix without assuming the distribution law form. An example it is described the detection of the signal at the output of compression system of chirp ionosonde.В статье предложена модель представления данных радиолокационного зондирования в виде смеси фоновых и целевых отсчетов, представляющая собой сумму двух случайных величин с сильно различающимися параметрами. Для модели изучено поведение центральных моментов без предположения о виде закона распределения смеси. Приведен пример использования для обнаружения сигнала на выходе системы сжатия ЛЧМ ионозонда