Millimeter Wave Radar Helicopter Communication Integration Research

At present, the helicopter on the communication function or on the radiocommunication to achieve, but radio transmission rate is slow, and the need to transfer alarge amount of information communication stations can not complete, this can in timeto the battlefield situation and cooperative engagement and other information istransmitted to the other helicopters, the helicopter combat cannot cooperate, helicoptertarget hitting ability and battlefield survival ability will be greatly reduced. If we canapply the helicopter radar communication integration, using radar high power and highsensitivity receiver can greatly increase the communication distance; radar bandwidthfor communication data high speed transmission provides good condition; at the sametime, the radar antenna strong orientation of communication signals confidentialityprovides a strong guarantee, and also greatly enhance the anti-jamming capability of thecommunication signal. We make the communication system uses radar antenna,transmitting and receiving system, greatly improving the equipment utilization rate.This thesis presents the radar signal from the integration of communication signals,so after the spreading process is loaded into the radar signal, the radar signaltransmission to realize the transmission of the communication data. And in the radarsystem receiver in radar communication mixed signal forward homomorphic filteringlogarithm transform and modified FastICA combination algorithm for blind signalseparation. The main content are as follows:（1）The architecture of the integrated helicopter radar communication systembased on signal integration is proposed, makes the radar signal and communicationsignal compatible to avoid the radar system at work when the radar signal andcommunication signal between the frequent switching, the helicopter radar system hasbeen further improved on the time utilization, and the whole system of how to achievethe working mechanism and workflow detail.（2）The signal format and modulation method to the radar, communicationsintegration system in helicopter are analyzed and designed. And the indexes of thehelicopter radar tactics and the parameter of radar signal are predicted. Utilize the frequency analysis and the ambiguity function analysis to radar communicationmixed-signal for obtaining the transmission performance and the parameter settings.（3）Analyze the radar communications integration signal separation technology.The improved fastICA algorithm is come up based on the original algorithm to realizethe faster and more accurate performance. The experimental simulation is designed tovalidate these capabilities. Combine the homomorphism filtering and improved fastICAalgorithm to realize the mixed-signal separation algorithm. With a large number ofsimulation, verified the transmission conditions, the transmission performance and goodnoise immunity anti-jamming performance.（4）According to the simulation of radar searching and tracking with thecommunication, proposed several strategies to improve the searching performance onthe radar in the situation of compatible communication.