METHOD DETERMINATION OF THE SENSORS CONTROL OF CONDITION TRACK SECTION WITH AN ADAPTIVE RECEIVER

The article presents one of the most promising methods for detecting a moving unit by a sensor for monitoring the condition of track sections, namely, rail circuits with an adaptive receiver. The scheme for realizing control sections using a computer is presented.

ARFIS: Adaptive-Receiver-Based Fuzzy Inference System for Diffusion- Based Molecular Communications

Background: The architecture and sequential learning rule-based underlying ARFIS (adaptive-receiver-based fuzzy inference system) are proposed to estimate and predict the adaptive threshold-based detection scheme for diffusion-based molecular communication (DMC). Method: The proposed system forwards an estimate of the received bits based on the current molecular cumulative concentration, which is derived using sequential training-based principle with weight and bias and an input-output mapping based on both human knowledge in the form of fuzzy IFTHEN rules. The ARFIS architecture is employed to model nonlinear molecular communication to predict the received bits over time series. Result: This procedure is suitable for binary On-OFF-Keying (Book signaling), where the receiver bio-nanomachine (Rx Bio-NM) adapts the 1/0-bit detection threshold based on all previous received molecular cumulative concentrations to alleviate the inter-symbol interference (ISI) problem and reception noise. Conclusion: Theoretical and simulation results show the improvement in diffusion-based molecular throughput and the optimal number of molecules in transmission. Furthermore, the performance evaluation in various noisy channel sources shows promising improvement in the un-coded bit error rate (BER) compared with other threshold-based detection schemes in the literature.

Adaptation of the CMS Radio Link According to the Information Rate in the Presence of Interference

In modern command and measurement systems (CMS), phase-shift keyed signals are widespread, which, with relatively simple methods of formation, have a low level of side lobes of the autocorrelation function (ACF). Also, in recent years, a number of studies have been carried out on the implementation of the principle of constructing the CMS, based on the adaptation of processing algorithms to the properties of useful signals and interference. On the basis of this principle, an algorithm for adapting the CMS radio link has been developed, which makes it possible to analyze information channels at various speeds and automatically connect the selected channel, which is an urgent task for controlling low-orbit spacecraft. The article proposes a receiver scheme with parallel reception of several information channels with different information transfer rates. The analysis of autocorrelation and cross-correlation functions made it possible to conclude that the data obtained do not contradict the assumptions about the possibility of implementing an adaptive receiver with the choice of an information channel in terms of speed. It is shown that the use of such a receiving device with an algorithm for selecting and switching information channels according to the reception rate provides a significant gain in information transmission time in comparison with traditional reception and switching of speeds by commands in conditions of complex interference stop.