The Design Of The Embedded Systems Of The High Dynamic Spectrum Monitoring Equipment Based On Cortex-A8

In recent years,various types of domestic radio station emerged quickly.As an important carrier of radio technology,the resources of radio spectrum are very valuable.In order to make effective use of the limited spectrum resources,avoid electromagnetic interference among the radio stations and maintain a good electromagnetic environment,the development of spectrum monitoring equipment has become increasingly urgent as it is the key instrument in monitoring and managing the spectrum resources.The spectrum monitoring receiver designed by this thesis is a device with completely independent intellectual property rights.It can overcome some shortcomings,including high cost,single function and un-custom,under the condition of ensuring the same performance with the similar foreign equipment.At the same time its cost,modular design,customization and network communications have been improved accordingly to better meet the needs of domestic users.This thesis focus on the research of embedded system in spectrum monitoring receiver.The main contents of this thesis are as follows:1.The hardware design of embedded system based on Cortex-A8 is completed,including the minimum system unit,design of communication bus for digital IF signal processing unit,RF control hardware interface and design of expansion interface hardware circuit.2.Uboot,Linux kernel transplantation and root file system production are completed.Based on the detailed analysis of S5PV210 processor boot process and the Linux kernel boot process,this thesis achieved the stable operation of Uboot₂01310 and Linux kernel in the spectrum monitoring receiver.It can lay foundation for the development of follow-up drive and application software.3.The designs of HPI interface driver of S5PV210 and DSP and the dynamic reassembly driver of S5PV210 on Airtex-7 are completed under the basis of detailed analysis of the HPI interface access process and the Airtex-7 chip configuration process.Then the relevant tests of the driver are completed.4.The Socket network communication based on Linux is completed,including the network card driver porting,TCP protocol network transmission overview and Socket network communication design,then the device remote access/control functions are achieved ultimately.Finally,the overall performance test of the device is completed.The spectrum monitoring receiver designed by this thesis has reached the level of similar foreign equipment in the RBW,Span accuracy,frequency response,displaying the average noise level and so on.This equipment also has some advantage in low power consumption,scalability and cost-effective.And it also can be remote controlled through the Internet so that it has a good human machine interface.The test results show that the performance indicators meet the design specifications.At present the device has been successfully delivered to users,and has been mass production.