The Research On Spectral Sharing Technology Based On Waveform Design

The current spectrum resources increasingly scarce,In the battlefield and civil life,communication signals and radar signals coexist in large quantity.The full utilization of spectrum resources is essential in joint operation,unmanned combat platform and cognitive radar.Under the background of complex electromagnetic environment,this project mainly studies the spectrum sharing technology based on waveform design.The main innovation points are as follows:1.In the design of waveform based on FCC emission masking,several pulse waveforms for UWB system are studied,and the time domain waveform,ESD and PSD characteristics of gaussian pulse and its differential forms are introduced in detail.The weighted algorithm of random coefficient is proposed,and the algorithm is simulated based on gaussian pulse.2.In the spectrum sharing waveform design based on SHAPE algorithm,the SHAPE algorithm was firstly derived in detail,then the LFM signal model used for simulation was briefly introduced,and the practicability of the algorithm was proved by an actual sequence design example of broadband radar imaging.Finally,two optimization methods of adding a piece of passband and improving the initial signal are proposed.The simulation results show that these two optimization methods can make the SHAPE algorithm converge to zero faster.3.In the spectrum sharing waveform design based on spectrum constrained optimization algorithm,the basic thought and solving steps are described in detail,then using a random phase sequence sonar signal spectrum constrained optimization algorithm to make to the instance simulation,and uses the hierarchical method to deal the spectrum constrained optimization algorithm,then realize our ultimate spectrum constraints.Finally,the simulation results of the spectrum constraint optimization algorithm are analyzed and the effectiveness of the proposed algorithm is verified.