What is voice-controlled transmission
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How does the cellular network work? What are the GSM, UMTS and LTE cellular standards? How high is the exposure to high-frequency electromagnetic fields in the cell phone base stations and in the end devices, the cell phones? Here you can find information on the basic aspects of cellular communications.
Electromagnetic fields High-frequency electromagnetic fields
In mobile communications, high-frequency electromagnetic fields are used for the wireless transmission of voice and data. As waves, they propagate in free space at the speed of light and can transmit energy and information over great distances.
Electromagnetic fields from mobile radio terminals
The cellular end devices mainly include classic cell phones and smartphones. Routers and tablet computers also belong to this device group if they can set up and use cellular connections. The devices generate high-frequency electromagnetic fields for communication with a cellular base station. In the devices commonly used today, the transmitting and receiving antennas are often built into the device and are not visible from the outside.
Electromagnetic fields 5G
The next generation of mobile communications, 5G, has been introduced since 2020. Self-driving cars, voice-controlled assistants and intelligent refrigerators are just a few examples of how the higher data transmission rates of the new cellular technology could be used. However, there are also concerns.
Electromagnetic fields LTE
LTE is a digital cellular technology and is considered the successor to UMTS (Universal Mobile Telecommunications System). Like UMTS and its extensions HSPA (High Speed Packet Access) and HSPA +, LTE is also assigned to the third generation of mobile communications (3G). Only the further development of LTE-Advanced meets all the requirements that the standardization committees place on fourth generation (4G) mobile radio technology.
Electromagnetic fields UMTS
Third generation (3G) cellular networks have been in operation in Germany since 2004. They are based on the digital transmission standard UMTS (Universal Mobile Telecommunication System). The frequency range reserved for the networks is between 1900 and 2170 MHz, i.e. slightly above that of the E networks.
Electromagnetic fieldsGSM standard
Between 1992 and 1995, the first fully digital cellular networks went into operation in Germany. The networks still in operation today work according to the GSM standard (Global System for Mobile Communications). They use radio frequencies in the range of 900 MHz in the D network and 1800 MHz in the E network.
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