Integrated Design And Development Of Typical Wireless Signal Detection Software In Time-Frequency-Direction-Modulation Domain

With the rapid development of communication technologies,more and more application scenarios put forward higher requirements for the security and stability of communication systems.For the scene of the ship's wireless communication environment,the spectrum detection work is the cornerstone for the ship formation to complete the patrol mission safely,and it is also an important guarantee for national defense security and social and economic development.In the current practical application,there is not a complete simulation software,which can simultaneously realize the functions of detecting the real-time spectrum,the direction of the arrival angle and the modulation mode of the digital signal of the interference signal,and based on the signal data,an accurate interference source is analyzed.In this paper,based on MATLAB and C++,this paper develops a spectrum detection simulation platform software,which provides maritime communication workers to simulate the sea surface spectrum,and specifies a high mobility early warning scheme for interference signals.The main contents of this thesis are as follows:1)According to the actual requirements of the current sea surface communication spectrum detection work,this paper designs three functional modules:process simulation,equipment simulation and state generation,and develops various signal generation,channel simulation,real-time spectrum detection,direction estimation,modulation mode identification and other functions.Based on various requirements,the integrated platform software of time-frequency system spectrum detection software was built,which realized many core functions such as signal processing result output from signal data generation,providing multi-functional and high-precision spectrum simulation and analysis capabilities,and testing.The software's various functional indicators are used for actual detection of typical scenarios.2)For the DOA estimation function in the spectrum detection function,the existing Multiple Signal Classification(MUSIC)algorithm is improved and optimized to meet the needs of practical application scenarios,and an efficient detection based on uniform circular array antenna is proposed.The algorithm reduces the computational complexity,makes software engineering implementation possible,and improves the efficiency of software operation.Finally,this paper looks forward to the extension of the software function designed and developed.