Design And Implementation Of Miniaturization Broadband Spectrum Monitoring Interference System

Spectrum monitoring is an important basis and means to achieve spectrum management, abnormal signal interference are important for important meetings and exam confidentiality. Based on such application background and practical needs, in this paper, the miniaturization of broadband spectrum monitoring and signal interference suppression techniques are studied, and combine both of them to realized the monitoring and interference integration system in this paper, this system is small, convenient for mobile deployment.First analyzes the system functional requirements in the frequency sweep and suppress working status, design the overall system architecture based on the analysis of functional requirements and realize system miniaturization, subdivided the interference monitoring system into different modules.Then, receive channels and transmit channels are integrated in a single board and share parameter configuration interface for miniaturized design, programs are designed to achieve RF receiver channel and RF transmit path, describes the detailed design of the transceiver module interface, the key module parameters and the way to configure the local oscillator frequency and other parameters. The DC offset calibration and IQ imbalance calibration are designed in order to improve the performance of the receive path, proposed a two-dimensional look-up table to calibrate the signal power measurement accuracy according to the characteristics of the receiving channel gain settings, test results show that adding the calibration modules has improves the system performance.Then, the working process of the monitoring and jamming system is designed, expounds the program design thought of system function modules. Then expounds the method of the background spectrum update and signal power spectrum calculation and signal detection, in view of the background spectrum is not smooth problem, a reasonable improvement scheme is designed, a adaptive power spectrum data truncation method is designed to accommodate the transmission requirements. Comparative analysis the spectrum characteristics of the RF noise signal, noise FM signal, noise AM signal and noise PM signals, final design the noise signal based on the principles of the FM signal as the interference signal. In addition, a kind data interface was designed based on USB to achieve high speed data transmission and equipment miniaturization, and a reasonable and effective data transmission frame format was designed.Finally, the system scan frequency range, frequency sweep speed and other performance indicators were tested and analyzed. The results show that the spectrum monitoring and interference system designed and implemented in this paper has reached the design requirements.