Note for Cellular and Mobile Communications - CMC By Murali M
- Cellular and Mobile Communications - CMC
- Note
- Raghu Engineering College - REC
- Electronics and Communication Engineering
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Mobile Wireless Communication Systems Part 1- Introduction & Principles Dr Murali M Professor , Dept of ECE Raghu Engg College.
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Contents • • • • • • • • • • Introduction Frequency Band History Principles Transmission Properties Cellular Concept Traffic Engineering Propagation Modulation Performance
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Wireless Communications • • • • • • Introduced in the 19th century and developed over the subsequent years. One of the most important mediums of transmission of information between devices. The information is transmitted through the air using electromagnetic waves with no cables or wires or other electronic conductors. In the present days, the wireless communication technology refers to a range of wireless communication devices and technologies ranging from smart phones to computers, tabs, laptops, Bluetooth Technology, printers. Many devices are used for wireless communication like mobiles, Cordless telephones, Zigbee wireless technology, GPS, Wi-Fi, satellite television and wireless computer parts. Current wireless phones include 3 and 4G networks, Bluetooth and Wi-Fi technologies. https://www.elprocus.com/types-ofwireless-communicationapplications/
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Frequency Bands ▪ VHF (30 MHz - 300 MHz) – VHF Mid Band (70 - 87.5 MHz) – VHF High Band (148 - 174 MHz) ▪ UHF (300 MHz - 3 GHz) – – – – UHF Band (403 - 420 MHz) UHF Band (450 - 520 MHz) UHF Band 900 MHz (820 - 960 MHz) UHF Band 1.9 GHz (1880 - 1900 MHz)
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