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.
This paper describes problems of multi-level classification of real M-PSK modulated signal frames by using methods based on constellation shapes. Modulation classifiers which automatically recognise the type of modulation in HF band have been developed. One of the oldest of modulation recogniser uses a bank of demodulators. Each of demodulaters is recognized only one type of modulation.
This article deals with the issue of testing a correct implementation of SIP signaling at different endpoints. Our testing was based on the basic standard of RFC 3261. We focused on proceeding an INVITE request with regard to its correct syntax. In the CipherCAD environment, we designed a model for an automatic testing via differently modified INVITE requests. We carried out a series of tests which...
Perspective method for the monitoring and on-line modulation analysis in the HF band is presented in this paper. The workplace for the on-line analysis of analog and digital modulations consists from the digital receiver IZ225 and a PC with adequate SW. The original program for the on-line modulation signal analysis was designed in the programming environment CipherCAD. The type of modulation, its...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.