Design Of Host Computer Software For The Wideband Signal Transceiver

Modern radio-frequency signals are becoming more and more complex,and higher and higher requirements are put forward for the function and performance of the measuring equipment.In order to test complex RF signals,it has become urgent to develop wideband signal transceiver and real-time processing equipment.At present,the development of wideband RF signal transceiver in foreign countries has been relatively mature.Related instruments have rich functions and strong configurability,but the price is expensive.And the domestic research on wideband RF signal transceiver is relatively few,and related instruments mainly rely on imports.In order to break the import monopoly and realize the instrument localization,it is very important to carry out research on broadband signal transceiver module and related supporting software in China.The objective of this study is to design the upper computer softwarebased on a PXIe broadband signal transceiver module.The module is a modular instrument that integrates the functions of broadband signal transceiving,analysis and generation.And the module has the characteristics of wide bandwidth,high frequency bandwidth and high power precision.Virtual instrument technology is adopted in the subject.And the broadband signal transceiver module is the hardware platform which the subject is based on.Using LabWindows/CVI,a virtual instrument development platform,this subject design and implement a multi-functional host computer software,from the perspective of user demand.The software can not only control the signal receiving,transceiving and generating functions of the hardware module,but also correct some of the key parameters of the module.And it also has the function of debugging,which can improve the development efficiency of the module.It's a special upper computer software which is rich in funcions.This paper will discuss the design and implementation process of the software.The main contents of this paper include:1.Based on the hardware platform and user requirements,the software function framework is integrated,and the upper computer software is divided into three parts: control module,correction module and interaction module.Each module will be designed and implemented separately.2.Establish the communication between the upper computer software and the transceiver module,design the control flow of the software to the transceiver module in detail,and realize the control of signal conditioning,signal generation,signal sampling and other functions,and process the sampled data in both time domain and frequency domain.3.Analyze influence factors and correction principle of the parameter that need to be crrected such as channels' gain,local oscillator leakage and in-band flatness.And then design the function of correction specifically.4.According to the requirements of the r&d staff and the customers,the design of the soft panel of graphics is completed to provide both kind of users with friendly interactive interfaces with intuitive display and convenient operation.By adopting the above method,this design finally realizes the upper computer software for the broadband signal transceiver module.It has been tested and verified that the software basically meets the design requirements and has been formally applied in this type of transceiver module project with good application effect.