What type of radio frequency transmissions are used by Bluetooth devices?

Bluetooth works on the 2.4GHz ISM band… Gaussian frequency-shift keying (GFSK) frequency spread spectra… it is a device that processes radio frequencies

What type of Radio Frequency transmissions are used by Bluetooth devices? And more information about BT

One of the most widely used and named technologies in the world is Bluetooth wireless technology. With it, we can make endless things, versatile connections in almost any type of device that needs to transmit data in real-time or in specific files. Bluetooth is one of the technologies that are most widely applied in the transmission of multimedia data, where many technology companies design headphones, screens, and many other devices that can be connected to smart devices of all kinds.

This technology was a revolution in its time since information could be transmitted at a greater distance than infrared transmission, where the devices had to be brought close enough to only transmit images, documents, and music, in addition to the file size limit. Thanks to Bluetooth, all types of files can be transmitted over a considerable distance, without the need to bring the devices closer together.

Radio Frequencies and technologies applied in the dynamics of Bluetooth

It is a short-range technology that does not require very high power to operate. Bluetooth works on the 2.4GHz ISM band, which stands for Industry, Science, and Medical Applications, being a very useful technology in the named areas.

Other foundations of Bluetooth technology are Gaussian frequency-shift keying (GFSK) frequency spread spectra, where the transmission rate is approximately 1Mbits / s. In addition, other technologies such as differential quadrature phase-shift keying (DQPSK), which works in the 2Mbits / s range, and also 8-phase shift differential phase-shift keying (8DPSK) technology, which works in the range of 3Mbits / s. These technologies have been applied since the first versions of Bluetooth, achieving better results, to the point of extending the distance from about 10 meters of range for data transmission to about 100 meters away without obstacles.

What are the dynamics of Bluetooth technology based on?

Radio Spectrum
Radio Spectrum Management: Policies, Regulations and Techniques 1st Edition by Haim Mazar, Photo: amazon.com

Bluetooth technology is based on a frequency hopping spread spectrum radio, which also makes use of a master-slave model information transmission dynamic. Information travels discreetly, that is, it is not a continuous flow of information, but rather the information is segmented into parts called packets. As the information is transmitted discreetly, the signal is very versatile and can cross obstacles.

The devices configured as master are connected with slave devices in an asymmetric connection, which implies that the devices that are as slaves are only receivers of information, which they can reproduce with specific functions such as printing, music, video, and among others.

Although its applications are mostly directed towards headsets, computers, printers, and other more common devices, it has more sophisticated applications such as creating simple networks of up to 7 devices, where they are configured as masters or as slaves. Watch below more about Bluetooth technology:

Bluetooth technology architecture

The architecture of this technology is based on a logic system between software and hardware that is made up of 3 main components: the transceiver, baseband, and a protocol stack. The functions of these objects are as follows:

  • Transceiver: it is a device that processes radio frequencies, so it is the one that provides communication between the objects to be connected, that is, between a master object to a slave one.
  • Baseband: It is the component in charge of managing the network that exists between the devices connected through Bluetooth.
  • Protocol stack: it is the component used for the communication process between devices and for defining the profiles that each device will have.

These components are key to the correct operation of this technology. Read More

Latest Advances in Bluetooth Technology

This technology has been developed for short ranges, which allows fluidity and better control in private networks of the personal area type, where there are only devices connected to each other. One of the recent advances in Bluetooth technology is the drastic reduction in energy consumption of master devices, that is, those that emit the information to be processed. This technology was called BLE, which stands for Bluetooth Low Energy.

The invention of BLE technology has been a fundamental step in the advance towards the applicability of Bluetooth to dynamics such as the IoT, or the internet of things. By allowing many objects to be interconnected at extremely low power consumption, you will aid in the versatility and efficiency of the object system. It is important to highlight the fact that thanks to modern Bluetooth technologies, it is possible to achieve a data rate of 1Mbps wirelessly in a home network.

Latest Advances in Bluetooth Technology
Emerging and Advanced Bluetooth Technology Paperback – by Dr. Nirmla Sharma (Author), Dr. S.K. Gupta (Author); Photo: amazon.com

A little history of Bluetooth technology

Bluetooth technology first emerged in 1994 as a solution for the annoying cables that had to be connected between the mobile phone and other devices. The company that sought to achieve this technology is Ericsson Mobile Communications. Other companies such as Nokia, IBM, and Toshiba, joined this initiative to make it available to everyone. The first version of this technology was published in 1999 by a group called SIG, the Special Interest Group, made up of these previously named companies.

“Bluetooth was invented back in 1994, but the first Bluetooth phone didn’t hit shelves until 2001.”

Subsequently, many more companies joined the SIG, including Apple, Intel, Lenovo, Microsoft, and many others, reaching a surprising number of approximately 14,000 companies in the interest group.

Bluetooth FM Color
Photo: bluetooth.com

The origin of the Bluetooth logo has been one of the most impressive, as it is a symbol known all over the world, where just when you see it, you already know what technology it refers to. The symbol is a combination of the letters H and B in the runic alphabet. Read more


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Conclusion – What type of radio frequency transmissions are used by Bluetooth devices?

The invention of Bluetooth technology has been one of the most important in modern technology. The impact it has caused on the way we reproduce multimedia files is enormous since it is so convenient to connect our mobile wirelessly to a speaker, a wireless screen, or headphones. The security provided by this network is excellent, as it can only be done in one location using passwords, which has been a very important factor that concerned users. We are currently working on the improvement of this technology, which implies that we will see other applications of it, such as in the internet of things.

What type of radio frequency transmissions are used by Bluetooth devices?
Photo: unsplash.com


Where does the name Bluetooth come from?

It comes from the name of a Danish king, who was a Viking, called Harald Blatand. His last name means Bluetooth.


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