The present paper studies the wide frequency correspondence emphatically in the wireless local area network's application. In view of the wireless local area network's characteristic analysis wide frequency communication's usable condition, the superiority which and the advantage can provide and so on launches the research to seek the new performance more superior wide frequency code to construct and to analyze. First introduced that the wireless local area network's in communication status, has analyzed the wireless local area network's rationale thoroughly, theoretically with project practical angle to wide frequency sequence (m sequence, Gold sequence and Walsh sequence and so on) the performance and the characteristic have carried on the analysis, and has given the m sequence, the Gold sequence and the Walsh sequence and so on method of formation, studied each kind of sequence orthogonality to seek the new performance more superior wide frequency code to the system performance influence to construct and to analyze, has carried on the computer simulation. along with the communication industry development, the wireless local area network (Wireless Local Area Network WLAN) is getting higher and higher in communication's status, the recent years was obtained the swift and violent development under the huge commercial interest actuation. Based on The IEEE802.11 agreement's wireless local area network is in the data communication emerging domain, it provides the wireless broadband access function in the very great degree has satisfied the user in the migration (low speed) in the situation to the wireless data transmission broadband access demand, has the giant market prospect. From now on, the wireless high speed local area network's market value will have the possibility to surpass moves the public network and becomes one of entire world wide web most important constituents. The wireless local area network (Wireless Local Area Network WLAN) is the use wireless transmission medium local area network, it takes the limited local area network's supplement, may satisfy motion, the heavy localization, the special network request, the scope which the cover wired local area network involves with difficulty. The wireless local area network takes the cellular technology the supplement, it through the micro honeycomb, the picocell and the minimum honeycomb's structure fills the special region, completes the people to the two-way charges for cellular phones multi-level requests, and can enhance the limited frequency spectrum enormously the use factor.
The wide frequency correspondence, namely the spread spectrum communication technology (Spread Spectrum Communication), is the application frequency spectrum stretch technology, realizes the encryption, a selected location correspondence new discipline. The wide frequency correspondence applies most early in the military aspect, mainly uses in the antijamming and the security. Along with the people to wireless communication equipment demand's increase, the wireless frequency band is getting more and more crowded, spatial each kind of disturbance also along with it enhancement. The wide frequency correspondence already became one very important mailing address, and its application is also getting more and more popular and widespread. Becomes the third generation mobile communication system's strongest candidate take the spread spectrum technology as the foundation code division multiple access (CDMA) mailing address by the other mailing address incomparable superiority, is best multiple access turning on plan which the future will correspond. this article take the wide frequency correspondence as a starting point, introduced mobile communication's multiple access, the CDMA type and the characteristic and the wide frequency sequence's function, and theoretically has analyzed the wide frequency sequence with the project practical angle (the m sequence, the Gold sequence and the Walsh sequence and so on) the performance and the characteristic. Has given the m sequence, the Gold sequence and the Walsh sequence method of formation, discussed each kind of sequence orthogonality to the wide frequency correspondence performance influence, and has carried on the computer simulation.