scholarly journals Experimental Research of Modulation-Coding Schemes Influence on Size of the DRM Digital Radio Broadcasting Service Area in the VHF Band. Part 2

2021 ◽  
Vol 7 (4) ◽  
pp. 138-149
Author(s):  
S. Myshyanov
Keyword(s):  
Experimental Research ◽  
Service Area ◽  
Signal Quality ◽  
Digital Radio ◽  
Coding Schemes ◽  
Modulation Coding ◽  
Radio Broadcasting ◽  
Transmission Modes ◽  
Broadcasting Service

The article presents the results of measurements of the parameters of the digital radio broadcasting DRM signal quality in the experimental zone of St. Petersburg in order to determine the influence of the transmission modes laid down in the DRM standard on the size of the service area.

scholarly journals Experimental Research of Modulation-Coding Schemes Influence on Size of the DRM Digital Radio Broadcasting Service Area in the VHF Band. Part 1

2021 ◽  
Vol 7 (3) ◽  
pp. 101-112
Author(s):  
S. Myshyanov
Keyword(s):  
Experimental Research ◽  
Service Area ◽  
Signal Quality ◽  
Digital Radio ◽  
Coding Schemes ◽  
Modulation Coding ◽  
Radio Broadcasting ◽  
Transmission Modes ◽  
Broadcasting Service

The article presents the results of measurements of the parameters of the digital radio broadcasting DRM signal quality in the experimental zone of St. Petersburg in order to determine the influence of the transmission modes laid down in the DRM standard on the size of the service area.

scholarly journals Experimental Research into the Influence of Photodetector Types on Characteristics of Optical Mini-Sticks of Unified Human- Machine Interfaces

2018 ◽  
pp. 137-142
Author(s):  
Sergey A. Golubin ◽  
Alexei N. Lomanov ◽  
Vladimir S. Nikitin ◽  
Valery M. Komarov
Keyword(s):  
Experimental Research ◽  
Test Bench ◽  
Signal Amplitude ◽  
Central Position ◽  
Signal Quality ◽  
Path Diagram ◽  
Photo Detectors ◽  
The Right ◽  
The Cost ◽  
Ray Path

The article provides the results of the experimental research into the influence of different types of photo detectors of digital optical mini­sticks on their transformation function – the useful mini­stick signal as a function of the mini­stick control lever deviation value. The set problem was solved using experimental research methods. Circuits with a photo diode (PIN photodiode PD15– 21B/TR8 manufactured by Everlight company) and circuits with a phototransistor (phototransistor KP2012P3C manufactured by Kingbright company) were studied. An automated test bench was used for the research. The test bench allows setting the mini­stick rotation angle and the value of mini­stick lever deviation from the central position to the left or to the right. The influence on mini­sticks was set by the test bench software. Based on the test results the test bench software plotted a ray path diagram. The mini­stick signal quality was assessed in terms of resolution, accuracy, non­linearity and hysteresis. The following results were obtained in the research. The mini­stick using a photo transistor as a photo detector ensures the output signal amplitude and resolution which exceed those of mini­stick with a photodiode by factor of 3.5 to 4. It allows using mini­sticks with a phototransistor for high­precision control of complex robotic systems, manipulators and aircraft, and for designing joysticks and unified human­machine interfaces on their basis. The indices of precision, non­linearity and hystere sis of both mini­stick types are comparable and meet the basic requirements applied to control devices. Thus, mini­sticks based on phototransistors can be regarded as the best in terms of the signal quality. Taking into consideration the circuitry, overall dimensions and the cost of hardware components which are identical for both photo detectors, mini­sticks based on phototransistors shall be considered to be more advanced switching devices.

RESULTS OF THE DRM SIMULCAST FIELD TRIALS IN 87.5-108 MHZ BAND

2021 ◽  
Author(s):  
С.А. СОКОЛОВ ◽  
С.В. МЫШЬЯНОВ ◽  
Ю.А. КОВАЛГИН
Keyword(s):  
Russian Federation ◽  
High Power ◽  
Electromagnetic Compatibility ◽  
Field Trials ◽  
High Power Field ◽  
Transmit Power ◽  
Digital Radio ◽  
Current State ◽  
Radio Broadcasting ◽  
The World

Показано современное состояние цифрового радиовещания в России и в мире. Описаны результаты исследований, проведенных в опытной зоне аналого-цифрового DRM/ЧМ-радиовещания в полосе частот 87,5-108 МГц в Санкт-Петербурге в период с 18 июля 2019 г. по 25 декабря 2020 г. при мощностях аналоговой и цифровой частей передатчика, равных 3000 и 800 Вт соответственно. Приведены результаты оценки электромагнитной совместимости обоих форматов радиовещания. Сформулированы требования, предъявляемые отечественными радиовещателями к системе цифрового радиовещания в диапазоне 87,5-108 МГц, и показано, что аналого-цифровой формат DRM Simulcast соответствует им. The current state of digital radio broadcasting both in Russia and in the world is presented. Digiton Systems LLC carried out a high-power field trial of the DRM system in DRM Simulcast mode by order of the Russian Television and Radio Broadcasting Network (RTRN) in the FM band 87.5-108 MHz in St. Petersburg (Russian Federation) from July 2019 to December 2020. The transmitter was set to radiate at 95.9 MHz FM signal with a transmit power of 3 kW and DRM signal with a transmit power of 800 W simultaneously. The article presents the results of these studies. The results of evaluating the electromagnetic compatibility of FM and DRM broadcasting formats are also described.

Brain-Like System for Audiovisual Person Authentication Based on Time-to-First Spike Coding

2013 ◽  
pp. 662-689
Author(s):  
Simei Gomes Wysoski ◽  
Lubica Benuskova ◽  
Nikola K. Kasabov
Keyword(s):  
Neural Network ◽  
Pattern Recognition ◽  
Experimental Research ◽  
Auditory Processing ◽  
Neural Code ◽  
Future Research ◽  
Network Architectures ◽  
Spiking Neural Network ◽  
Coding Schemes ◽  
Spike Coding

The question of the neural code, or how neurons code information about stimuli, is not definitively answered. In addition to experimental research, computational modeling can help in getting closer to solving this problem. In this chapter, spiking neural network architectures for visual, auditory and integrated audiovisual pattern recognition and classification are described. The authors’ spiking neural network uses time to first spike as a code for saliency of input features. The system is trained and evaluated on the person authentication task. The chapter concludes that the time-to-first-spike coding scheme may not be suitable for this difficult task, nor for auditory processing. Other coding schemes and extensions of this spiking neural network are discussed as the topics of the future research.

scholarly journals Foundations, Alan Plaunt and the early days of CBC radio

2021 ◽  
Author(s):  
John E. Twomey
Keyword(s):  
Graduate School ◽  
Pivotal Role ◽  
Public Broadcasting ◽  
Doctoral Study ◽  
Radio Broadcasting ◽  
Public Broadcasting Service ◽  
Broadcasting Service ◽  
The University

This book is very aptly named, for it was Alan Plaunt, more than any other individual, who set the philosophical and organizational foundations of the CBC and its progenitor, the Canadian Radio Broadcasting Commission. Plaunt's pivotal role in the genesis of public broadcasting in Canada was initially set out by Michael Nolan as his doctoral study for the University of Western Ontario where today Nolan teaches at the Graduate School of Journalism. CBC Enterprises published Nolan's work along with several other books in the fall of 1986 in celebration of CBC's 50 years of public broadcasting service. The 162 page narrative is enhanced by its thorough footnoting and seven pages of reference sources on Canadian broadcasting history.

scholarly journals Advanced modulation coding schemes for an optical transceiver systems–based OWC communication channel model

2021 ◽  
Vol 10 (2) ◽  
pp. 767-775
Author(s):  
Hazem M. El-Hageen ◽  
Aadel M. Alatwi ◽  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Communication Channel ◽  
Channel Model ◽  
Power Level ◽  
Q Factor ◽  
Code Scheme ◽  
Optical Wireless ◽  
Coding Schemes ◽  
Modulation Coding ◽  
Received Power ◽  
Modulation Code

This paper examines advanced modulation coding schemes for an optical transceiver systems–based optical wireless communication (OWC) channel model. These modulation techniquesinclude On-Off keying and return to zero (RZ)/non–return to zero (NRZ) coding. The signal power level against time and frequency spectral variations are measured. The max. Q factor and min. bit error rate (BER) are estimated and clarified for each modulation code scheme by using an optisystem simulation model. Transmission bit rates of up to 40 Gb/s can be achieved for possible distances up to 500 km with acceptable Q factor. The received power and max. Q factor are measured and clarified with OWC distance variations. The On-Off keying modulation code scheme resulted in better performance than the other modulation code schemes did.

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