Development of principles, methods and schemes of transmission, receiving and processing of signals with a total bandwidth 1-10 GHz
The country is increasingly developing high-speed railway traffic comfortable express trains, highways are built for high-speed vehicles. The velocity of these objects reach 200-300 km / h, respectively. There is therefore a need to ensure passenger services 4G. The purpose of this project is to develop principles, methods and schemes of transmission, reception and processing of signals with a total operating frequency band 1-10 GHz and 4G services to subscribers in mobile terminals (MT), moving in carpool and express train at a speed of 300 to 200 km / h.
The basic idea of providing high quality signals 4G services in mobile communications in difficult conditions, when there are a large number of subscribers moving at high speeds up to 300 km / h, is to use two basic principles of network: datacentricity and digital signal processing. Recent approaches, methods and tools developed by the authors for solving problems concerning the implementation of these two basic principles of the network.
Developed and proposed by the authors of a new technology conversion superheterodyne receiver portion of the mobile terminal "Technology and method for selective conversion of frequencies (multi-criteria optimization of heterogeneous receiver parameters MT)", in which the transfer of only part of the spectrum of the received baseband signal to a low intermediate frequency, which allows you to find the optimal ratio selective intermediate frequency converters, the width of the operating frequency bands of the spectrum baseband signal are converted, and the width of the bandwidth of the analog signal to the ADC.
Developed and proposed by the authors of a new technology organization channelization equipment "Technology and the method of determining the optimal groups OFDM-symbols (multi-criteria optimization of heterogeneous parameters channeling equipment)", in which one or more OFDM - symbols create a group that MT is allocated from the overall spectrum baseband and completely transferred into the frequency range below 1 GHz for subsequent digital processing, which provides a compromise between the cost of the system, the number of groups of modulator efficiency and the use of the frequency spectrum utilization efficiency of the subcarriers in OFDM-symbols.