Broadband multiservice radio access system with increased bandwidth: Patent

In today's world of ever-growing interest in this channel information, as an international computer network Internet. All the currently available Internet access, technology which is often complement each other, forming various-branched network. This narrow-band technology that used by the public telephone network, is increasingly giving way to a new and particularly microwave systems, which are representative of the system based on microwave integrated broadband systems  MITRIS-INT. The significant size of the service area MITRIS-INT makes it easy to maintain a spatially remote users within a radius of 50-60 km. But the disadvantage of the current system MITRIS-INT, and its subsequent modifications is insufficient capacity within the occupied bandwidth in the frequency range 11.7-12.5 GHz.

Therefore, the scientists of the department of radio technologies Saiko V. G. and Kazimirenko V. Y., together with domestic telecom developers from Institute of Electronics and Communication under the guidance Narytnika T. M. developed an innovative technical solution that has received a patent in June 2016. The purpose of this solution are:

- Improving the forward channel bandwidth, resulting in improved spectral efficiency

- Increased the size of the service area, effectively use the system as forming the backbone.

Increasing the spectral efficiency of the communication channel is proposed to realize by using modulation techniques in directions to the subscriber stations which include (or has connected) Wi-Fi access point. This compensation effect of reducing the power efficiency is realized by reducing the length of the generated data bearer, and an increase in power of a communication channel.

Since the technical solution of the prototype for larger service area and to increase economic efficiency by reducing the need to cover the central station, uses QPSK modulation (although in this case there is a loss in spectral efficiency), offered to use 64-QAM modulation can improve spectral efficiency is at least three times, while reducing the energy efficiency (with an appropriate choice of encoding) on the value 10 ... 15 dB (i.e., 10 ... 30 times).

The head of the department of Radio technologies

Sayko Volodymyr Hrygorovych

Doctor of technical science, professor of the Department of Radio technologies

(044) 249-25-04