The complex maritime environment has led to the lack of detection means of electromagnetic spectrum at sea,and also brought challenges to the design of hardware platform for electromagnetic spectrum detection.Facing the complex electromagnetic environment at sea,this paper carried out the design and research work of the electromagnetic spectrum detection hardware platform.Aiming at the lack of detection means of electromagnetic spectrum at sea,combined with the advantages of embedded technology,a decision-making module with Zynq7020 processor as the detection platform,a radio frequency receiving module with AD9361 radio frequency chip as the core,and a variety of marine environment detection sensors constitute the sensing module.The main design scheme.Aiming at the problem that the offshore electromagnetic spectrum detection hardware platform needs to realize the diversification of functions and the high complexity of the platform circuit,the hardware platform of the electromagnetic spectrum detection is divided into functions,and the circuits of each functional module are designed and implemented respectively.When designing the PCB of the hardware detection platform,it is necessary to solve the problems of signal integrity and high-speed data transmission.By improving the stacking structure,designing the topology and performing impedance matching,the PCB layout and routing are completed.In this way,an electromagnetic spectrum detection hardware platform with customizable functions in complex maritime environments is realized.Finally,the design of the FPGA part in the Zynq7020 is completed,and then in order to test the function of the offshore electromagnetic spectrum detection node,the power supply system is first tested;then the IQ signal converted by the AD9361 is tested through the integrated logic analyzer;The Linux operating system was added to the platform to test the receiving spectrum range and bandwidth of the radio frequency receiving link,and at the same time test whether the functions of other peripherals on the hardware platform are normal;finally,the sea environment data detection was tested.The experiment proves that the offshore electromagnetic spectrum detection node functions well and meets expectations. |