Around 1890s Marconi invented the wireless telegraph by encoding the alphanumeric characters in analog signals. He sent the telegraphic signals across the Atlantic Ocean and was successful. After Marconi's great invention, many changes came in the field of technology opening doors for wireless mobile devices.
In 1960's military had started using different types of wireless communication devices for many years. Wireless communications created great advances not only in the communication systems, but also in the aviation and space programs as well. Initially the military developed wireless communication through line of sight (If there were no obstacles between point A and B, you could send and receive electromagnetic waves). Later on, new techniques came that allowed to encompass larger areas such as using atmosphere as the reflection medium.
Later in the 1970's satellite systems emerged and were commercialized. With the arrival of satellite communication systems, the quality of service and reliability increased enormously. However, the satellites are difficult to build and maintain and are very expensive. We had to search for other options for reliable wireless communications. In 1980s, the cellular telephony technologies were commercially viable and the 1990s witnessed the advances in cellular technologies. Later many technologies such as WI-FI, Bluetooth, 2G and 3G emerged in order to make the mobile computing devices more accessible and more reliable.
In 1960's military had started using different types of wireless communication devices for many years. Wireless communications created great advances not only in the communication systems, but also in the aviation and space programs as well. Initially the military developed wireless communication through line of sight (If there were no obstacles between point A and B, you could send and receive electromagnetic waves). Later on, new techniques came that allowed to encompass larger areas such as using atmosphere as the reflection medium.
Later in the 1970's satellite systems emerged and were commercialized. With the arrival of satellite communication systems, the quality of service and reliability increased enormously. However, the satellites are difficult to build and maintain and are very expensive. We had to search for other options for reliable wireless communications. In 1980s, the cellular telephony technologies were commercially viable and the 1990s witnessed the advances in cellular technologies. Later many technologies such as WI-FI, Bluetooth, 2G and 3G emerged in order to make the mobile computing devices more accessible and more reliable.
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