Design Of Miniaturized Wireless Transmission System On Cannonball In High Overload Environment

With the in-depth research on precision strike of artillery shells,missile-borne telemetry technology has been rapidly developed.At this stage,for specific communication tasks,most of the telemetry systems are designed with hardware design as the core,which has the disadvantages of large size,single function,poor scalability,and low versatility.At the same time,the demand for missile-borne multi-target telemetry missions adapted to the high-overload environment of projectiles is also growing.In this paper,based on the wireless transmission module in a projectile trajectory measurement,a set of miniaturized wireless transmission system that is suitable for the projectile overload environment and supports multi-target communication is designed.The hardware platform design of the missile-borne wireless transmission system mainly studies the definition of software radio technology and the ideal software-defined radio structure.The hardware platform of the missile-borne multi-target wireless transmission system is designed using software-defined radio ideas.Designed the overall architecture of the hardware platform,completed chip selection,circuit schematic and PCB design,signal integrity analysis,circuit board miniaturization design and circuit overload resistance design.Compared with the traditional missile-borne radio hardware platform with distributed hardware design as the core,it has the advantages of simplified hardware,good flexibility,reconfigurable functions,and easy upgrade.The software design of multi-object communication system mainly studies multi-object communication technology,direct sequence spread spectrum code division multiple access technology.The focus is on direct sequence spread spectrum communication theory,pseudo-random code sequence and multiple access technology,pseudo-random code synchronization,carrier synchronization,etc.The software architecture of the missile-borne multi-target wireless transmission system is designed,and the balanced Gold code is designed as the address code for multi-target communication according to the specific project indicators of the missile-borne multi-target wireless transceiver system.The software design of the multi-object wireless transmission system is realized on the designed hardware platform and the experiment is verified.The key algorithms of the system are realized: source coding,spread spectrum,BPSK modulation,pseudo code capture and tracking,carrier synchronization,despreading,and demodulation;the radio frequency frontend configuration and underlying interface driver of the missile-borne radio hardware platform are realized.High and low temperature experiments,high-overload impact experiments and missile-borne flight communication experiments were carried out to verify that the results meet the design requirements of the system.