Technology Realization Scheme Of Mobile Phone Signal Condition Monitoring During Flight

In order to ensure the normal operation of all types of airborne equipment during flight,to avoid the interference of other electronic equipment signal to ensure flight safety,China Civil Aviation Airworthiness requirements in the flight process all the mobile phones must be closed,including the flight mode with the phone,Passengers can not be in the course of a long flight using the phone.With the aircraft airborne equipment,communication technology and continuous improvement of anti-interference ability,in 2013,the Civil Aviation Administration of China and the well-known airlines to study and demonstrate the aircraft during the flight of airborne equipment and equipment on the impact,Mobile phone in the flight process of the aircraft program.The goal of this paper is to design the signal monitoring scheme during the process of aircraft flight,to collect the analog signals sent by the mobile phone in the process of flight,to get the IF digital signal,and to process and analyze the IF digital signal in the digital signal processor.,To determine the status of mobile phones in which the purpose.The main contents are as follows:1.This paper will start from the current characteristics of the communication network to determine the way mobile phone signal acquisition and implementation path.And in accordance with the aircraft during the flight of mobile phone signal-intensive,signal power is small and other practical situation,targeted to the collected mobile phone signal interference filtering and power to maintain the design of mobile phone signal in the analog signal acquisition and processing phase of the program.The research includes signal acquisition,signal interference and filtering,IF signal processing and other content of the feasibility and implementation plan.At the same time,according to the cabin environment,the distribution of mobile phones is more intensive,the signal monitoring is difficult to locate accurately,the impact of passenger satisfaction,design "one to one"(that is,a mobile phone signal monitoring equipment corresponding to a mobile phone)product design.2.From the mobile phone signal spread spectrum communication principle and characteristics of the aircraft to determine the process of determining the existence of mobile phone signal technology program,and the current PN code capture program to determine the process of aircraft flight PN signal capture program.At the same time,according to the special environment of airplane cabin and the demand of airline,the whole framework scheme of mobile phone signal detection in aircraft flight is designed.3.For the aircraft during flight flight signal frequency and transmit power characteristics,according to the framework of the program to determine the hardware selection.4.Will be collected by the mobile phone signal processing,focusing on how to design the FPGA module to determine the signal detection alarm processing.In this paper,the application of practical research,service objectives and objectives of a single,specific,targeted signal acquisition,signal interference and filtering,IF signal processing programs are highly targeted,the results will directly help the formation of mobile phone signal monitoring Products,making the air cell phone open eventually become a reality.