Cellular Communications
Wireless telephone sets are used in a specialized communications system called cellular. Originally, the cellular […]
Personal and Hobby Wireless
Satellites and Networks
A satellite system is like a huge cellular network with the base stations (repeaters) located […]
Amateur and Shortwave Radio
In most countries of the world, people can obtain government-issued licenses to send and receive […]
Security and Privacy
People are becoming more and more concerned about the security and privacy of electronic communications, […]