EDDC 0423 Advanced Communication System and Design Microwave Engineering BSECE 4th year Engr. Christopher V. Maglaque, MEM Assistant Professor IV Path Profile Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS A Path Profile is a graphical representation of the path traveled by the radio waves between the two ends of a link. The path profile determines the location and height of the antenna at each end of the link, and it insures that the link is free of obstructions, such as hills, and not subject to propagation losses from radio phenomena, such as multipath reflections. Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Sample Problem: Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS An FM LOS microwave link operates at 6.15 GHz. The required receiver IF bandwidth is 20MHz. The transmitter output power is 30dBm. The receiver front end’s first active stage is a mixer with a noise figure of 9dB. The path length is 21 mi; the antennas at each end have a 35-dB gain and the transmission line losses at each end are 3dB. If the FM Improvement threshold is used as the unfaded reference, what is the reliability of the radio link? Solutions: Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Solutions: Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Solutions: Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Solutions: Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Solutions: Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design . Advanced Communication System and Design . Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Advanced Communication System and Design - MICROWAVE LINK CALCULATIONS Sample Problem What fade margin is required for a microwave LOS link with a time availability requirements of 99.997%? Advanced Communication System and Design - Microwave System Performance DIVERSITY TECHNIQUE 1. Frequency Diversity Advanced Communication System and Design - DiversityTechnique Frequency diversity is simply modulating two different RF carrier frequencies with same IF intelligence, then transmitting both RF signals to a given destination. At the destination, both carriers are demodulated, and the one that yields the better-quality IF signal is selected. DIVERSITY TECHNIQUE 2. Space Diversity Advanced Communication System and Design - DiversityTechnique With space diversity, the output of a transmitter is fed to two or more antennas that are physically separated by an appreciable number of wavelengths Advanced Communication System and Design - Q&A QUESTIONS??? Advanced Communication System and Design THANK YOU & GOD BLESS STAY SAFE EVERYONE
