Telecommunication systems / Laboratory

Fundamentals of communication systems. Spectral analysis. Model of a communication system with block diagrams. Technical wireless transmission. Technical analog modulation (AM & FM). Pulse modulation systems <sampling theorem, pulse amplitude modulation (PAM). Configurations: Pulse time PTM, pulse width PDM and PPM pulse position. Pulse Code Modulation PCM. Quantization signals, delta modulation, time division multiplexing. Telephone switching. Exchange timeslots. Telephone networks. Mobile networks, gsm. Digital Network Integrated ISDN services. G.M.S. Systems & G.P.S.

Objectives

The aim of the course with the assistance and the laboratorial course of telecommunications is to conceive and familiarize the student with the basic techniques of transmission of data. Progressively student is imported in practices of concretisation of such systems as telephone networks and unified services.

Prerequisites

No prerequisites

Syllabus

1) Introduction 1b) Fourier Series in three forms. 1c) Examples of Fourier series. 2 a) Response of linear system - sampling function. 2b) Normalized Power (Normalized power) - Normalized power amplifier gain in db. 2c) Normalized power to the expansion of Fourier series. Fourier Transform Export from the Fourier series. 3 a) Examples Fourier Transformation. 3b) Spectral function.- back sinusoidal waveform back to maximum frequency fm. 3 c) Shifting signals in another spectral range. 4a) Theorem of Parseval. 4b) Lowpass – High pass filters. 4 c) Model of a communication system with block diagrams. 5 a) transmitting electromagnetic wave.-Data transmission lines, cables, coaxial optical fiber. 5a) Antenna – types and specifications - power transmitter and receiver. 5b) Satellite communications. 5c) satellite antennas. 6a) Method frequency shift 6b) Recovery of baseband signal. 6c) Configuration amplitude modulation.- Regaining signal. 7 a) Maximum permitted modulation.- Demodulator law of the square. 7b) spectral width modulated waveforms. Balanced modulators. 7 c) Configure single sideband SSB. Production method SSB signal. 8 a) Frequency Multiplexing. 8b) Phase modulation.- Configuration phase and frequency. 8 c) Relationship between phase and phase deviations Frequency. Bandwidth of a sinusoidal modulated signal FM. 9a) demodulator FM. 9 b) The theorem of the sampling . Low Pass Filter – High Pass Filter. 9c) Amplitude modulation –pulse modulation PAM. 10 a) Physical sampling - sampling flat. Signal Recovery through restraint. 10b) ''Cross talk ''.- disagreement coefficient signals '' Cross talk Factor ''. 10 c) Configuration time pulse PTM Method of generating signals PTM-Configuration PPM-Pulse Position Modulation Pulse duration PDM 11a) Regaining baseband signals converted from PDM and P.P.M. in PA, M .. Transmitter receiver synchronization. 11b) Noise TV channels. Quantization signals. Quantization error. The P.C.M. system pulse code modulation (Pulse Code Modulation) . TDM with P.C.M. 11 c) Configuration Delta - restrictions on Delta configuration. Multiplexing PCM.-frame synchronization signals. 12 a) Multiplexing lines T1.- lines T2, T3, T4. Simple telephone network. 12b) .- Exchange Telephone switching time.- 12c) for telephone networks. Mobile networks.- digital network ISDN services. 13 a) General repetition 13b) Examples - Exercises. 13c) Exercises. LABORATORY EXERCISES BY TWO HOURS 1st EXERCISE: Insert - Function of laboratory units-Using the Oscilloscope 2nd EXERCISE: Harmonic analysis of periodic square wave. 3rd EXERCISE: Superheterodyne receiver. 4th EXERCISE: Amplitude modulation (AM). D.S.B. (Double sideband). 5th EXERCISE: Broadcast a side (SSB) 6th EXERCISE: Sampling and retention. 7th EXERCISE: Time Division Multiplexing 8th EXERCISE: Pulse Code Modulation. (P.C.M.) 9th EXERCISE: Noise in pulse code systems. 10th EXERCISE: Delta modulation. 11th EXERCISE: Construction of a transceiver with delta modulator and existing units. 12th EXERCISE: The GPS system (Global Positioning System).