2.4GHz Band WLAN RF Test And Evaluation Of Uncertainty

With the development of communication technology, the gradual emergence ofnew equipments, the limited spectrum resource to use effectively is more important.Reuse of frequency is to communicate without interference by different modulationmode in the same frequency band，it realized the reuse of frequency resources. Thecomplex modulation of accuracy has higher requirements. The methods ofmeasurement are developing and advanced.The2.4GHz spectrum is open for wireless communication equipment. It is themain band that ISM and short distance communication are used. The devices of shortdistance are used in close range. The electromagnetic environment is complex in theregion. The2.4GHz radio management is not approved in our country. The equipmentis qualified by testing which is completed by national laboratory. They are usedwithout approval by the radio management organizations. A lot of people are using inthe band. In our country, the equipment of this band is based on “[2002]353”. Thereare index in this document. There are not the rules of testing and the accuracy.In this paper, the2.4GHz band WLAN test method and reliability test evaluationare lack. Test method is designed. Through experimental tests to verify its feasibility,evaluation of uncertainty verifies the reliability.First, the modulation of2.4GHz band is main theory, the various modulationprinciple was introduced. Secondly, it introduces the basic concepts of uncertainty, theof classification method and calculation process. Thirdly, according to“[2002]no.353”, I design test method of2.4GHz WLAN. It is tested to verify the technicalfeasibility. According to the test method establish the mathematical model ofuncertainty. The resulting data and parameters will be used to establish themathematical model. Distribution function will be based on the data obtained. It givesout the confidence interval according to distribution function and Expansion factor.It is the uncertainty of the report according to the experimental results. It can judge the reliability of data. According to the uncertainty analysis of the main factorsaffecting the report component, provide the basis for future operation andimprovement method.The main contributions are as follows:(1) According to“[2002] no.353”, I design test method of2.4GHz WLAN. It can meetthe needs of the existing laboratory conditions.(2) According to the design method evaluate the uncertainty, the degree of reliabilityis given. To find the influencing factors, the methods of test will be improved in thefuture.The study above that provides a complete solution to design test method ofWLAN and evaluation of uncertainty. It is so easy to be compared that laboratoriesuse the same method and the similar equipment. The dates are recognized in anther.It is simple to test among laboratories. To provide a reference that WLAN are tested inthe china.