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.
Correlation measure is an important indicator of the performance any code sequence family used for communication system. Frequency Hopping (FH) codes are similar in construction of Time Hopping (TH) codes used in Ultra Wide Band (UWB) communication systems. Since the development of TH codes is not yet fully established, in this paper an effort has been made to utilize FH code families as TH codes...
The concept of vector summation of a target response to two orthogonal polarized signals for enhancing its delectability, even under concealed conditions, have been demonstrated. A dual polarized 94 GHz radiometer mounted on a dual axis scanning systems has been utilized to collect the field data for the study of the concept. Emissivity gradient due to the presence of target embedded in a given background...
In tropo communication, the received signal suffers from slow varying multipath fading characterized by Rayleigh distribution, Doppler shift and delay spread. In this paper a tropo channel is simulated using Tapped Delay Line (TDL) structure with varying tap-gains. A case study has been presented, for a typical troposcatter link, to appreciate the losses and delay spread experienced. The effect of...
Proposed work shows the rain rate versus rain attenuation characteristics on the basis of equiprobability. Two year signal data from IPSTAR satellite at 20.2 GHz and two year rain data of corresponding period is used to develop rain attenuation characteristics. Delhi earth station data provided by SAC, Ahmedabad is used. The outcome of this work is very useful in short term signal behavior and rain...
The disdrometer data on rain drop sizes, collected at Ahmedabad (India), has been analyzed to develop empirical model on drop-size distribution (DSD). Analyses has been carried out to find suitability of lognormal or gamma distribution. The lognormal distribution has been found to give better correlation. The data has been analysed on annual and monthly basis to find out seasonal variability. Statistical...
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.