Sökning: "central receiver system"

Visar resultat 11 - 15 av 19 uppsatser innehållade orden central receiver system.

1. 11. Investigation of Variety of Non-CoherentFront end Detectors For Timing Estimation

   Master-uppsats, KTH/Signalbehandling

   Författare :Luis Lacasa Calvo; [2013]
   Nyckelord :;

   Sammanfattning : The indoor localization of mobile users is currently a central issue for many applications and fields, including sensor networks, asset management, healthcare, ambient-assisted living, and public safety personnel localization. Existing solutions often rely on the fusion of information from multiple sensors. LÄS MER

3. 12. Co-Design of Antenna and LNA for 1.7 - 2.7 GHz

   Master-uppsats, Fysik och elektroteknik

   Författare :Kane Jacob; Bala Bhaskar Gudey; [2012]
   Nyckelord :ADS; LNA; Antenna; NF; co-design; codesign; E-pHEMT;

   Sammanfattning : In a radio frequency (RF) system, the front-end of a radio receiver consists of an active antenna arrangement with a conducting mode antenna along with an active circuit. This arrangement helps avoid losses and SNR degradation due to the use of a coaxial cable. LÄS MER

4. 13. Co-Design of Antenna and LNA for 1.7 - 2.7 GHz

   Master-uppsats, Fysik och elektroteknik; Tekniska högskolan

   Författare :Bala Bhaskar Gudey; Jacob Kane; [2012]
   Nyckelord :;

   Sammanfattning : In a radio frequency (RF) system, the front-end of a radio receiver consists of an active antenna arrangement with a conducting mode antenna along with an active circuit. This arrangement helps avoid losses and SNR degradation due to the use of a coaxial cable. LÄS MER

5. 14. Improved Temporal Resolution Using Parallel Imaging in Radial-Cartesian 3D functional MRI

   Master-uppsats, Datorseende

   Författare :Gustav Ahlman; [2011]
   Nyckelord :fMRI; PRESTO-CAN; SENSE; parallel imaging; temporal resolution; radial-Cartesian sampling; normalized convolution;

   Sammanfattning : MRI (Magnetic Resonance Imaging) is a medical imaging method that uses magnetic fields in order to retrieve images of the human body. This thesis revolves around a novel acquisition method of 3D fMRI (functional Magnetic Resonance Imaging) called PRESTO-CAN that uses a radial pattern in order to sample the (kx,kz)-plane of k-space (the frequency domain), and a Cartesian sample pattern in the ky-direction. LÄS MER

7. 15. Security and Performance Analysis of Topology-Based Intrusion Detection System in Ad Hoc Networks

   Master-uppsats, Blekinge Tekniska Högskola/Avdelningen för telekommunikationssystem

   Författare :UMUNNA CHRISTIAN CHEZZ CHETACHI; [2009]
   Nyckelord :Ad-hoc networks; cluster topology; Intrusion detection system; jammer attack Security;

   Sammanfattning : As Wireless ad-hoc Networks are becoming an increasingly emerging technology taking a centre stage in exciting research areas which has attracted many research attentions in communication systems, the need for efficient intrusion detection techniques to enhance network security and privacy has gained significant prominence. Intrusion detection systems(IDS) in ad- hoc networks provides an effective method to improve the security, energy efficiency of transmission nodes allowing better spatial reuse of the wireless channel and control over network resources in order to optimize node security and the transmit power thereby maintaining network connectivity. LÄS MER