Design And Implementation Of Automatic Identification System For Communication Signal Modulation Based On LabVIEW

Communication signal modulation recognition system has wide application in the field of communication; determining the type of signal modulation is a prerequisite for subsequent signal processing. Current research recognition systems are mostly for simulation signal. System development of programming languages:Assembler, VHDL, C and Matlab language, etc., but the use of these languages to write more complex software systems, and the compatibility and usability is not strong. And for hardware system software of the actual signal, complex structure, function expansion is not strong, high cost and limited range.With the rapid development of microelectronics, computer, signal processing technology and software radio, automatic recognition system modulation signal has attracted wide attention, the design of an open, universal, standardized automatic recognition system to achieve the communication process modulated signal automatic recognition, great research value. With the help of LabVIEW software platform with powerful features, are designed to achieve the automatic recognition system for the simulation and actual RF signals.This paper consists of two parts:a part of the classification and recognition of the modulation signal simulation starting signal simulation designed automatic recognition system based on LabVIEW, functional modules and classification system of the modulation signal by LabVIEW Simulation software, and the system the simulation, are summarized for the pretreatment process obtained three kinds of analog modulation signals and six kinds of digital modulation signals, the principle characteristic parameter selection and classification algorithm; the other is based on the simulation results, the radio frequency signal from the actual classification point of view, using an antenna, USRP hardware devices, combined with the idea of software radio is designed based on LabVIEW and the USRP radio signal automatic recognition system, through experiments, this system can be better on the actual AM, DSB,FM,2ASK,4ASK,2FSK,2PSK radio signals classification.