Digital radio monitoring system

The invention discloses a digital radio monitoring system. The output end of receiving antennas at the high end and the low end of the system are connected with the high input end and the low input end of a 2:1 selector; the output end of the selector is connected with a receiver; the receiver is connected with a CPLD control module for realizing bidirectional data transmission; an excitation source is also connected with the CPLD module and is controlled by the CPLD; the low-end output of the excitation source is connected with a low-end power amplifier; the high-end output is connected with a high-end power amplifier; the high-end power amplifier and the low-end power amplifier are respectively connected with corresponding high-end and low-end transmitting antennas; a system local input keyboard, a display screen and the like are directly connected with the CPLD module; a DSP processing module is also directly connected with the CPLD module; a DSP is connected with a Flash, an eeprom and an SRAM; and a CPLD module interface is connected with a computer for realizing remote control. In the system, investigation, reception, analysis and interference suppression of radio signals are designed integrally, so that fast discovery and real-time interference of interference signals are realized and the damage of illegal signals is reduced to the maximum.