The Design And Implementation Of Data Processing Of Broadband Cognitive Radio Perception Module In High-speed Frequency Hopping

With the continuous development of communication technology,the demand for the quality of communication grows stronger.According to the work of a certain unit,the project group developed the broadband cognitive radio communication platform,which can improve the communication ability in the electromagnetic interference.The research results have been affirmed by the cooperative units.However,the existing research results have some problems,such as long response time,insufficient sampling rate and so on..Therefore,the project group has improved the broadband software radio communication platform based on cognitive radio technology.The data processing part of the broadband cognitive radio sensing module is one of the important part of the cognitive radio communication platform.It is mainly responsible for real-time sensing,processing the communication data,and sending the data to the software part,which will calculate the spectral energy,find and replace the disturbed frequency point in time.The main work and innovation of this paper are as follows:1.According to the demand analysis of the improved broadband software radio communication platform,this paper gives the overall design of cognitive radio sensing module.The module includes radio frequency receiving and processing module,A/D module,data processing module based on FPGA,PXI interface module and power module.It can improve the communication rate and output the baseband signal directly.2.This paper gives a detailed design and implementation of the data processing part,which includes the AFE7222 data receiving module,the signal processing module,the analysis and encapsulation module and the PCI connection module.It realizes the function of digital down conversion,MSK demodulation,frequency hopping synchronization and so on.3.In order to improve the speed of FFT processing and reduce software data calculation,the FFT computation is moved from the software part to the FPGA,which effectively reduces FFT processing time.4.In order to improve the data processing speed,this paper puts forward a timely data cleaning program for FIFO,which add asynchronous empty FIFO statement generation part in the process of analyzing and encapsulation to ensure that data does not occur confusion in the data processing process.The module is tested over the broadband cognitive radio communications platform,and the results show that the module designed in this paper can effectively and correctly acquire,process and transmit data,meet the design requirements and ensure the communication and anti-jamming capability of the communication platform.