Design And Verification On Channel Equalization Algorithm For Frequency-Hopping Communication Of UAV

Frequency-hopping(FH)communication technology is widely used in the military and civil communications because of its advantages in anti-interference and anti-interception capabilities.In order to further resist tracking interference,high-speed frequency-hopping communication has appeared.With the rapid development of UAV communication in the military and civil fields,it is of great significance to study the high-speed FH communication suitable for UAV.The high-speed FH communication of UAV requires high frequency hopping rate,high data transmission rate and antimultipath performance,which requires the processing speed and equalization accuracy of channel equalization algorithm.In order to solve this problem,based on the single carrier,this paper studies the channel equalization algorithm in high-speed FH communication system of UAV.The main work of the dissertation is as follows:First of all,the FH communication system and channel equalization technology are summarized.We introduce the characteristics of wireless fading channel and the key factors that affect the performance of FH communication system,and clarify the research status of channel equalization technology,which provides a reference for the design of the equalization algorithm in UAV.Secondly,the requirement analysis of FH communication of UAV is carried out,including application scenario and link performance.In this paper,the transmission mode of single channel service rate of 2.2Mbps,20000 hops per second and 16 frequency-hopping points is adopted.And we analyse the frequency offset and modulation scheme under the channel environment of UAV,which provides the theoretical basis for the design of system scheme.Thirdly,we design the channel equalization scheme for frequency-hopping communication of UAV.Firstly,according to the requirement analysis of FH communication of UAV,the corresponding frame structure and channel equalization algorithm are designed after theoretical analysis and simulation.Then we design different channel equalization schemes based on the frame structure and channel equalization algorithm including CP/ZP-based equalization schemes and non-integer sampling interval delay equalization schemes.The performance of equalization schemes under the actual multipath fading channel is compared,and an equalization scheme based on the combination of CP and advanced right-shift algorithm(anti non-integer multiple sampling interval delay algorithm)is proposed as an equalization scheme for UAV FH communication.Finally,the performance curve of the complete equalization scheme is simulated based on MATLAB platform.In the end,the process from fixed-point simulation on the Matlab to hardware implementation on the FPGA platform is completed.There is a scheme of UVA communication system.Finally,the implementation details,performance and resource consumption of key modules are given.In this paper,we proposed and verified a single carrier channel equalization scheme for high-speed frequency hopping communication of UAV,which has theoretical and practical significance.And this paper provides a reference for the research of channel equalization in FH communication system of UAV.