The future of computers and communication lies with mobile devices, such as laptops, tablets and smartphones with desktop-computer capabilities. Their size, operating systems, applications and processing power make them ideal to use from any place with an internet connection. And with the expansion of ruggedized devices, the Internet of Things …
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Mobile communications systems have evolved through wireless technology innovation into 2G, 3G, and then 4G to keep pace with ever increasing voice and data traffic. 5G is the latest iteration of cellular technology that is providing seamless coverage, high data rate, low latency, and highly reliable communications. It will increase …
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End-user performance requirements continue to increase, putting high demands on the radio access network (RAN) to deliver increased coverage, capacity and end-user throughput. The antenna is an invaluable segment of any wireless network. Early 2G and 3G systems operated with two receive antennas spaced at least a lambda spacing to …
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The first-generation (1G) cellular wireless mobile system were analog and were based on frequency-division-multiple access (FDMA) technology. The second boost for the cellular industry came from the introduction of the second-generation (2G) digital technology standards, including Global System for Mobile (GSM), IS-136 (Time Division Multiple Access, TDMA), and Personal Digital …
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Mobile communications systems have evolved through wireless technology innovation into 2G, 3G, and then 4G to keep pace with ever-increasing voice and data traffic. Every generation of wireless technology brought many improvements including speed enabling many new applications. 1G was analog cellular. 2G technologies, such as CDMA, GSM, and TDMA, …
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The capacity of a wireless link is generally measured in bits per second per Hertz (b/s/Hz). The methods available to increase this capacity in a traditional Single Input, Single Output (SISO) wireless system are fairly limited: increase the bandwidth, allowing a corresponding increase in the bits per second, or increase …
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Reconfigurable intelligent surface (RIS)—known also as intelligent reflecting surface (IRS), and large intelligent surface (LIS)—is a programmable structure that can be used to control the propagation of electromagnetic (EM) waves by changing the electric and magnetic properties of the surface. These elements form a low-profile 2D reflecting or transmission array, …
Read More »Satellite communication systems consist of two main segments, the space segment and the earth or ground station. The ground station system coordinates the communication process with satellites in space. A communications satellite is an artificial satellite that relays and amplifies radio telecommunications signals via a transponder; it creates a communication …
Read More »The future of aviation worldwide is one of significant continuing growth in air travel, air cargo, and private general aviation. In parallel with this growth, a significant increase in the supporting information infrastructure will need to occur. The infrastructure will support two primary functions: aviation operational needs (which includes airline …
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Researchers are developing the Internet of Underwater Things (IoUT), a worldwide network of smart interconnected underwater objects that would transmit data from existing and planned roaming, autonomous vehicles, and underwater sensor networks to networks above the surface in real-time. DARPA launched the “Ocean of Things” program in 2017 to …
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