440-4211/02 – Optical Atmospheric Communications (OAK)
| Gurantor department | Department of Telecommunications | Credits | 4 |
| Subject guarantor | doc. Ing. Jan Nedoma, Ph.D. | Subject version guarantor | doc. Ing. Jan Nedoma, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Optional |
| Year | 2 | Semester | winter |
| | Study language | English |
| Year of introduction | 2015/2016 | Year of cancellation | 2023/2024 |
| Intended for the faculties | FEI | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Understand the basic principles of optical atmospheric communication and their differences in comparison to fiber optical communications.
Learning outcomes are set so that the students are able to identify and apply tasks in the field of optoelectronics and fiberless commnucations.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Summary
Subject deals with optical communications in free space. Attention is dedicated to directional optical connections and ordinary diffusion optical nets. Significant part content is orientated to IrDa transmission. Basic technologies will be described together with devices, properties of optical communications systems and influence of atmosphere on transmission signals.
Compulsory literature:
Recommended literature:
Additional study materials
Way of continuous check of knowledge in the course of semester
Two test during theoretical excercises.
E-learning
Other requirements
The condition for the credit obtaining are handover of all reports from laboratory measurements and succesfully managing of two tests.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
- Introduction - technology overview, system configuration, history of IR communication systems, optical fiberless channel, attenuation budget
- Atmosphere as a transmission medium - atmosphere properties and its influence on transmission properties, attenuation effects in atmosphere, scintillation
- Safety rules by atmospherical communications - influence of parasitic lights on transmission, the influence of sunshine, multi ray dispersion, characteristics of the human eye, laser classes, holographic diffusers, comparison of LD and LED, specialties of outside communication systems
- Introduction of optical concentrators - elements of ray optics, fundamentals of energy optics, Fermat principle, polarisation of light
- Optical concentrators - concentrator overview, demands on ir receivers, optical filters, ideal concentrator, fresnel lenses, hemispherical concentrators, parabolic concentrators,
- Dielectrical concentrators based on total reflection, - characteristics, geometrical amplification, maximum acceptance angle, concentrator comparison, another shape of concentrators with total reflection
- Optical transmitters for fiberless communications,- basics of transmitter design, optical demands to optical sources, types of optical modulators, driver circuits for optical transmitters, timing circuits, control of transmitting power
- Optical receivers for fiberless communications - basics of receiver design, selection of detectors, receiver noises, BER and receiver sensitivity, BW of the optical receiver, signal amplifiers,
- Modulation, coding, multiple usages of transmission media - analog, pulse, and digital modulation, types of modulation and their sensitivity to noises of the communication channel, access techniques to atmospherical channel
- IrDA protocols - standards of fiberless transmissions, an overview of IrDA standards, protocols for the physical layer, IrLM protocol, IA3 protocol, Tiny T protocol
- Introduction of Ir networks - network architecture, specification of optical fiberless networks, Ad hoc networks, QoS of fiberless optical networks, future trends in optical atmospherical communications
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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