Space and astronautical engineering

Satellite Communication (3 CFU): • Satellite communication coverage for Audio/TV Broadcast, Networking, Personal communication: single satellites and constellations in GEO, MEO, LEO orbits with corresponding antenna wide beams beam and high gain beams. Elements of antennas for Space applications; practical antenna systems for the satellite and for the ground segment. Antenna pointing accuracy requirements. Simplified models for signal propagation for satellite communication. • Block diagram of the satellite digital communication transceiver, including channel coding, mapping on the constellation, up-conversion; amplification and propagation; down-conversion, decision, decoding. Link budget, spectral efficiency and Bit Error Rate. Preliminary design of the communication link. • Channel coding: Hamming distance, error detection and correction, Hamming codes, Block codes, Linear Codes, Cyclic Codes (CRC, BCH and R-S), Perfect Codes, LPDC, Convolutional Codes and Viterbi decoding, Concatenated Codes, Turbo-Codes; Error Bursts and interleaving. Elements of probability theory: discrete random variables; Bernoulli distribution; evaluation of BER with Forward Error Correction. • Elements of probability theory: continuous random variables and vectors (probability density function, distribution function, moments); the Central Limit Theorem, the Gaussian probability density function. Thermal noise, Noise Figure and Temperature; evaluation of the Bit Error Rate for the different constellations. • Multiple access techniques: Frequency Division Multiplexing, Time Division Multiplexing, Code Division Multiplexing; Use of the polarization diversity. • Coding and Transmission of satellite/launcher digital telemetry data.

• Slides and notes available at the web site https://elearning.uniroma1.it/course/view.php?id=15493 • Satellite Communications, Timothy Pratt, Jeremy Allnutt, JohnWiley & Sons Ltd, Third Edition, 2020

Satellite Communication (3 CFU): • Satellite communication coverage for Audio/TV Broadcast, Networking, Personal communication: single satellites and constellations in GEO, MEO, LEO orbits with corresponding antenna wide beams beam and high gain beams. Elements of antennas for Space applications; practical antenna systems for the satellite and for the ground segment. Antenna pointing accuracy requirements. Simplified models for signal propagation for satellite communication. • Block diagram of the satellite digital communication transceiver, including channel coding, mapping on the constellation, up-conversion; amplification and propagation; down-conversion, decision, decoding. Link budget, spectral efficiency and Bit Error Rate. Preliminary design of the communication link. • Channel coding: Hamming distance, error detection and correction, Hamming codes, Block codes, Linear Codes, Cyclic Codes (CRC, BCH and R-S), Perfect Codes, LPDC, Convolutional Codes and Viterbi decoding, Concatenated Codes, Turbo-Codes; Error Bursts and interleaving. Elements of probability theory: discrete random variables; Bernoulli distribution; evaluation of BER with Forward Error Correction. • Elements of probability theory: continuous random variables and vectors (probability density function, distribution function, moments); the Central Limit Theorem, the Gaussian probability density function. Thermal noise, Noise Figure and Temperature; evaluation of the Bit Error Rate for the different constellations. • Multiple access techniques: Frequency Division Multiplexing, Time Division Multiplexing, Code Division Multiplexing; Use of the polarization diversity. • Coding and Transmission of satellite/launcher digital telemetry data.

• Slides and notes available at the web site https://elearning.uniroma1.it/course/view.php?id=15493 • Satellite Communications, Timothy Pratt, Jeremy Allnutt, JohnWiley & Sons Ltd, Third Edition, 2020