The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Reducing the multiple access interference is a challenge to Multi-user CSS (Chirp Spread Spectrum) communication system. Based on binary chirp signals in multi-user system, a better method to reduce the multi-user interference and improve the system performance is proposed. Two principles of choosing the quasi-orthogonal chirp signals were deduced, (1)Time Bandwidth Product TmBw >=20, their cross-correlation...