Sökning: "CR UWB"

Hittade 2 uppsatser innehållade orden CR UWB.

1. 1. Cognitive Radio for Short Range Systems based on Ultra-Wideband

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :ABDULLAH AL-MAMUN; MOHAMMAD RAFIQ ULLAH; [2011]
   Nyckelord :Cognitive Radio; UWB; Spectrum Sensing; Multitaper Spectrum Estimation;

   Sammanfattning : Cognitive Radio (CR) has been proposed as a promising and effective technology to improve radio spectrum utilization. It can change its transmitter parameters depending on the environment in which it operate based on interaction. In CR, a number of different methods of spectrum sensing are used to identify the presence of signal transmission. LÄS MER

3. 2. PERFORMANCE EVALUATION OF TRANSMITTED REFERENCE, FREQUENCY-SHIFTED REFERENCE AND CODE-SHIFTED REFERENCE MULTI-USER UWB SYSTEMS

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Juniad Bahadar Khan; Murad Ali; Fazal Wahab; [2010]
   Nyckelord :Ultra Wideband Communications; Transmitted-Reference TR UWB; Frequency-Shifted Reference FSR UWB; Code-Shifted Reference CSR UWB; Orthogonal Gold Code OG-CR UWB; CR UWB;

   Sammanfattning : Ultra wideband (UWB) is based on transmission with very short pulses of low energy. The use of UWB technology will increase in the fields of wireless communication in the near future. The wider bandwidth of UWB technology has several advantages such as excellent penetration ability, multi-user support and high channel capacity. LÄS MER