Design And Implementation Of Fast Jump Expansion Communication System Based On AD9361

Modern warfare is different from past battles.Wars present a trend of modernization and informatization,and more are not casualties but communications-related operations.The situation on the battlefield is constantly changing.How to pass the information to the comrades of the communication party on the same party is particularly important when the information is accurate and cannot be captured by the enemy's interfering party.It is particularly important to design a host that can achieve rapid frequency change transmission in a wide range of frequency domains and a matching slave that can receive information.The fast-hop high-spread communication system uses the irregular use of frequency points to transmit and receive in the broadband frequency band and combines the spread spectrum technology to efficiently avoid the enemy's interference and interception.It has strong anti-enemy interference ability,provides stable and reliable transmission,and anti-noise And multipath interference.Therefore,it has a wide range of applications in the game of communication electronics.This article aims at realizing fast frequency hopping in a wide frequency band,and designs and implements the master and slave of the fast high-hop communication system.This paper formulates the performance indicators of the system,and selects the key components according to the indicators.The RF chip uses AD936 X,the design and implementation of the fast high jump expansion host,the design and implementation of the fast high jump expansion slave,and the data frame in the baseband processor.structure.Finally,the hardware platform of the master and slave is designed to complete the communication of fast jump and expansion.The main research focus of this article is as follows:1.In order to achieve fast frequency hopping,complete the fast frequency hopping design of the radio frequency chip in the host,and complete the frequency hopping reception of the slave matching the host.Use the fast lock mode in the radio frequency module to achieve faster frequency configuration,reduce the time for phase-locked loop calibration,and complete the transmit carrier frequency and receive carrier frequency settings in the radio frequency module more quickly.And if you need to change the frequency hopping frequency point,you don't need to change the hardware platform,you only need to reconfigure the required frequency and pre-store it in the radio frequency module through the baseband processor FPGA to achieve rapid frequency change.2.In order to make the hardware platform of the host and slave of the fast jump communication system.Use Cadence Allegro software to design the hardware platform described in this article,design the radio frequency module part,the baseband processor part and the overall system power supply scheme,and complete the hardware circuit production of the host and slave of the fast jump expansion system.3.In order to meet the characteristics of frequency hopping spread spectrum,a data frame specific to this project is designed.The preamble sequence,synchronization sequence,and service timing sequence are added to the data frame.The preamble sequence is to improve the signal-to-noise ratio of the data received by the slave and to ensure that the amplitude of the signal is roughly stable during sampling.The synchronization sequence is used for frame timing synchronization and frequency hopping pattern synchronization in order to determine the position of the data frame.This article designs the master and slave program of the fast high jump expansion communication system,and completes its hardware circuit,and finally meets the performance index to realize the fast high jump expansion master and slave communication.