Research On The Theory And Key Technology Of Long-Distance Transmission Of Amorphous Flattened Air-to-Ground Wireless Self-Organizing Network Nodes

"With the continuous updating iteration and rapid development of technology,a new kind of amorphous flat wireless self-organizing network that can solve the problems of the long construction period of existing wireless mobile network,high deployment cost,not very compatible with disaster warning and national defense security,etc.has come into being.Although the whole process of promoting upgrading wireless communication and self-organizing network technology is growing,there is a relatively contradictory problem that the working frequency of wireless self-organizing network system keeps increasing and its coverage range keeps decreasing,then it will lead to the signal transmission distance between wireless self-organizing network devices will become shorter and shorter,and the deployment cost will become higher and higher.How to solve the wireless self-assembled network nodes in the high-frequency band that can still support the long-distance transmission of wireless signals will be very worthy of in-depth study of the hot and difficult problems.In this paper,corresponding solutions will be proposed for the above problems,and the main research work and corresponding research results are as follows.1.A distributed robust H_∞ adaptive fault-tolerant controller is proposed to break through the limitation that there can only be one Lyapunov matrix for different failure modes,which in turn can solve the problem that the amorphous flattened air-ground wireless self-organizing network system cannot balance the fault-tolerant performance of the control system and the communication system at the same time.Simulations and experiments show that the overall robustness and fault tolerance of the system is significantly improved,and the stability of the system is relatively increased by 159%when the transmission distance between the nodes of the wireless self-organizing network is within the interval of 800 meters.2.A distributed robust adaptive sliding-mode fault-tolerant controller is proposed,which can extract the fault information caused by the nonlinear distortion of power amplifiers and other components during the signal transmission of wireless self-organizing networks,and converge the resulting error signal asymptotically to zero by the designed feedback matrix K.It solves the problem of amorphous flattened air-ground wireless self-organizing network nodes in the process of relevant command signal transmission due to the failure problems of the wireless self-organizing network system performance deterioration,bounded signal attenuation,and transmission delay caused by the nonlinear distortion problem of the power amplifier and other components during the transmission of the relevant command signal are solved.Simulations and experiments show that the system as a whole has good nonlinear distortion tolerance correction capability,and the stability of the wireless self-organizing network topology is relatively improved by 56%when the transmission distance between the wireless self-organizing network nodes is within the 1200 m interval.3.The maximum ratio merging-based collaborative relay beamforming and bidirectional relay beamforming balance optimization strategies are proposed,respectively.A convex optimization method is used to solve the optimal vector of air-ground relay beamforming,so that each wireless self-assembling node can obtain the optimal SNR,which solves the problem that the SNR of the system is affected by the external interference noise signals received by the amorphous flat air-ground wireless self-assembling nodes during the signal transmission process.Simulations and experiments show that when the feedback rate of the system is certain,the performance of the SNR increases significantly with the increase of the overall feedback rate of the system,and the false bit rate of the signals received by the wireless self-assembled nodes decreases significantly with the increase of the SNR,and the transmission distance between the self-assembled nodes increases from the original 667 meters to 2200 meters,with a relative increase of 230%.4.A bi-directional robust fault-tolerant H_∞ non-sensitive compensated filter controller is proposed,which further optimizes the fault-tolerant correction factor and robust adaptive factor under the regulation of the feedback matrix K by a linear matrix inequality method,so that the estimated tracking error of the wireless self-assembled network system tends to zero asymptotically,solving the unknown fault of the amorphous flat-space wireless self-assembled network nodes and obtaining the optimal SNR The problem of obtaining the optimal SNR is solved.Simulations and experiments show that the wireless self-assembling nodes can change flexibly and adaptively with the scene change,the transmission distance between the air-ground wireless self-assembling nodes is relatively improved by 79.9%,and the loop success rate appears multiple stable fluctuation intervals,which greatly improves the survival rate of the wireless self-assembling nodes.5.Based on the above,two bidirectional power amplifiers for amorphous flattened air-ground wireless self-organizing network systems are designed to finally realize the long spacing transmission between wireless self-organizing network nodes.The experimental results show that the wireless self-organizing network nodes can support 25100m point-to-point long-distance transmission under the relative speed of 214km/h high-speed movement.