PROCEDURE FOR FORMATION OF FREQUENCY PLANS FOR COGNITIVE RADIO NETWORKS

Volodymyr Lysechko; Yuliia Yanina; Galina Cherneva

Scientific paper ID 1920 : 2020/2

PROCEDURE FOR FORMATION OF FREQUENCY PLANS FOR COGNITIVE RADIO NETWORKS

Volodymyr Lysechko, Yuliia Yanina, Galina Cherneva

During the research, the algorithm of frequency ensemble frequency plans formation based on the QOFDM method was developed and simulation of the procedure of formation of frequency ensembles of signal ensemble depending on different values of parameters of frequency plans was performed. The simulation results are presented graphically.

The work is devoted to the study of the properties of complex signals based on quasiorthogonal Frequency Division Multiplexing (QOFDM).

The QOFDM method significantly increases the bandwidth of the wireless communication network due to the nonlinear allocation of subcarrier frequencies.

An algorithm for ensemble formation was developed taking into account different values of subchannel width in the corresponding frequency plans.

Graphically, the form of frequency plans with different bandwidth and the dependence of the maximum emissions of CCF frequency plans, taking into account the number of subfrequencies and the width of the subchannels.

For statistical analysis, a simulation model of a radio channel was constructed, the results of statistical analysis of intercorrelation properties of frequency plans are graphically presented, properties based on quasi-orthogonal access at high frequencies are investigated, correlation properties of complex signals based on QOFDM are investigated.

Applying quasi-orthogonal access at high frequencies will increase the bandwidth of the communication system and the speed of information transmission due to the nonlinear distribution of high frequencies.

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вътрешна интерференция на системата квазиортогонално честотно разделение на каналите честотни противоречия подносеща честота честотен планinternal system interference quasiorthogonal frequency division of channels frequency collisions subcarrier fVolodymyr Lysechko Yuliia Yanina Galina Cherneva

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