Design And Implementation Of Indoor Radio Spectrum Detector Based On HackRF

From the 1970s to the 1980s,people had a keen interest in wireless networks and began research.From 1980 to 1989,wireless networks won the recognition of the market and the public for their lack of line and Super flexibility.That period was also the fastest time for LAN development.From 2G to 3G,to 4G,which has long been popular,to the fierce battle for 5G,and even 6G,which is slowly brewing,radio communication technology is developing at a speed that people can not imagine.With the continuous development of communication technology and the continuous progress of human society,people are increasingly dependent on radio communication,but in certain places,such as civil aviation aircraft,examination rooms,conference rooms that need to close mobile phones or prevent eavesdropping,etc..There are very strict restrictions on the use of radio.At present,the existing radio spectrum detection equipment on the market is expensive and too large to carry,which is not conducive to widespread use.Therefore,it is necessary to design a compact,portable,low-cost and convenient radio spectrum detector to meet the needs of rapid detection of the radio spectrum in specific locations.Using HackRF and GNU Radio,this paper designs a lightweight portable radio spectrum detector.This paper first introduces the research status of software radio and spectrum detector at home and abroad.The working principle of spectrum analyzer and related software radio theory are studied,and some methods of spectrum detection are analyzed.The hardware and software of the system are analyzed in detail.The third chapter introduces in detail the design of the radio spectrum detector.In the software design,emphasis is placed on the detection of signals and the design of signal processing.The energy detection method is used to scan a certain frequency band to detect whether there is a signal.And the communication system judgment of detected signal is studied.Based on GNU Radio open source software and HackRF,a software radio platform was built,developed using the Python scripting language,and a graphical interface was depicted through WX Python to display signal detection results.In order to test the rationality and correctness of the design,a high precision spectrum analyzer is used to verify the reliability of the system design.