37.620

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37.620 is an industry standard which defines a uniform and interoperable system for Broadband Wireless Access (BWA). It was approved in June 2011 by the International Telecommunications Union (ITU). The standard defines a network architecture, spectrum, and various frequencies which are allocated to provide wireless broadband services. The standard also defines a range of applications and services that can be provided with this system.

The 37.620 application field covers areas like urban Wi-Fi hotspots, public safety broadcasting, Local Multipoint Distribution Service (LMDS), Private Mobile Radio (PMR), and Digital Video Broadcasting (DVB). This standard can provide secure high-speed wireless services at various frequencies, which is more efficient than using a copper cable system.

The working principle of 37.620 specifies different architectures and techniques to achieve the wireless broadband communication. These techniques are based on the application field mentioned above. Generally speaking, wireless systems using the 37.620 standard follows the following steps:

• Radio Frequency (RF) transmissions are sent and received from a base station.
• An RF signal is broadcast and transmitted to customer premises.
• The customer premise equipment receives the RF signal and processes it.
• The customer premise equipment then communicates with the base station.
• The base station receives the data from the customer premises, processes it, and sends it back to the customer.

It is important to note that the end device should be certified by the ITU to use the 37.620 standard. The certification process is designed to ensure that the device is manufactured to the highest standards of performance. The standard also requires the use of special radiofrequency devices, such as radiofrequency decoders and signal routers. The devices should also be certified by the ITU.

Another important component of the 37.620 standard is the use of Quality of Service (QoS) parameters. This ensures that users will get a reliable and consistent service. The QoS parameters include Signal-to-Noise Ratio (SNR), Error Vector Magnitude (EVM), Bit Error Rate (BER), and Carrier-to-Noise Ratio (CNR). In addition to this, the standard also defines the robustness of the signal by requiring the use of error coding and Forward Error Correction (FEC).

The 37.620 standard is designed to ensure interoperability between various different wireless devices, including those from different vendors. It is designed to work with resource-constrained mobile devices and provide reliable services for low-powered devices.

In summary, 37.620 is an industry standard which defines a uniform way of providing high-speed wireless services. It specifies various architectures and techniques to achieve the communication, as well as Quality of Service parameters to ensure reliability. Furthermore, the standard requires that customer premise equipment must be certified by the ITU to use the standard, and that special radiofrequency devices like radiofrequency decoders and signal routers must also be certified.

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