Satellite Communication

At the end of the course, students should be able to: 1. describe the various Satellite communication Technologies; 2. explain various access techniques in Satellite Communications; 3. list the advantages and disadvantages of Multi-beam satellite; 4. implement network configuration; and 5. manage satellite communication equipment.

Satellite frequency bands. services, transmission and multiplexing schemes. trans- multiplexing. multiple access schemes. Satellite orbit. Satellite motion. Paths. Geostationary satellites. Non-geostationary constellations. Satellite subsystems. Satellite launching. Antennas: types, gain, pointing loss, G/T, EIRP. High power amplifiers. Low noise amplifiers. BUC/LNB: conversion process, polarisation hopping, redundancy configurations. earth station monitoring and control. Basic link analysis. attenuation. sources of interference. carrier to noise and interference ratio. System availability. Frequency reuse. Link budget. Link design. Multiple access techniques: companded FDM-FM-FDMA, SSB-AM-FDMA, amplitude, and phase nonlinearities. Optimised carrier to noise and intermodulation ratio. TDMA: frame structure, burst structure, frame efficiency, super-frame structure, frame acquisition and synchronisation, satellite position determination. TDMA equipment. advanced TDMA satellite systems. CDMA: direct sequence CDMA (DS-CDMA), sequence synchronous and sequence asynchronous DS-CDMA. random access DS-CDMA. link analysis. FH-SS systems. FH-CDMA. acquisition and synchronisation. Demand assignment multiple access (DAMA). types of demand assignments. DAMA characteristics. real time frame reconfiguration. DAMA interfaces. SCPC DAMA. SPADE. digital speech interpolation. Message transmission by FDMA. M/G/1 queue. message transmission by TDMA. pure ALOHA- satellite packet switching. slotted ALOHA. packet reservation. tree algorithm. Advantages and disadvantages of multi-beam satellites, interconnection by transponder hopping, interconnection by on-board switching (SS/TDMA). interconnection by beam scanning, ISL: GEO-LEO, GEO-GEO, LEO-LEO, RF, and optical links. VSAT networks. VSAT technologies. network configurations. multi-access and networking. network error control. polling VSAT networks. Lab Work: Illustration of Basics of Satellite Communication. Demonstration of antennas, high power amplifiers and low noise amplifiers. Illustration of FDMA techniques. Demonstration of TDMA structure and equipment. Illustration of CDMA equipment and techniques. Illustration of DAMA techniques. Demonstration of VSAT networks.