Search for dissertations about: "Information technology - Telecommunication"

Showing result 6 - 10 of 222 swedish dissertations containing the words Information technology - Telecommunication.

2. 6. Limited Feedback Information in Wireless Communications : Transmission Schemes and Performance Bounds

   Author : Thanh Tùng Kim; Mikael Skoglund; Hesham El Gamal; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Diversity-multiplexing tradeoff; Large deviation analysis; Limited feedback; MIMO channels; Relay channels; Telecommunication; Telekommunikation;

   Abstract : This thesis studies some fundamental aspects of wireless systems with partial channel state information at the transmitter (CSIT), with a special emphasis on the high signal-to-noise ratio (SNR) regime. The first contribution is a study on multi-layer variable-rate communication systems with quantized feedback, where the expected rate is chosen as the performance measure. READ MORE

4. 7. Quality aspects of internet telephony

   Author : Ian Marsh; Karlsson Gunnar; Henning Schulzrinne; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Telecommunication; Telekommunikation; VoIP;

   Abstract : Internet telephony has had a tremendous impact on how people communicate.Many now maintain contact using some form of Internet telephony.Therefore the motivation for this work has been to address the quality aspectsof real-world Internet telephony for both fixed and wireless telecommunication. READ MORE

5. 8. Towards robust traffic engineering in IP networks

   Author : Anders Gunnar; Mikael Johansson; Steve Uhlig; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Telecommunication; Telekommunikation;

   Abstract : To deliver a reliable communication service it is essential for the network operator to manage how traffic flows in the network. The paths taken by the traffic is controlled by the routing function. READ MORE

6. 9. LSB Data Hiding in 360o Videos

   Author : Dang Ninh Tran; Hans-Jürgen Zepernick; Thanh Nguyen Huu; Blekinge Tekniska Högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LSB data hiding; 360° Videos; Capacity; Fidelity; Quality; Computer Science; Datavetenskap; Telekommunikationssystem; Telecommunication Systems;

   Abstract : Modern telecommunication systems have seen an increased demand on delivering new types of digital media such as extended reality. The currently rolled out fifth generation mobile networks are expected to support virtual reality, augmented reality, and other immersive media. READ MORE

7. 10. Radio Frequency Power Amplifiers : Behavioral Modeling, Parameter Reduction, and Digital Predistortion

   Author : Magnus Isaksson; Peter Händel; José C. Pedro; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation; Electronics;

   Abstract : This work considers behavioral modeling, parameter-reduction, and digital predistortion of radio frequency power amplifiers. Due to the use of modern digital modulation methods, contemporary power amplifiers are frequently subjected to signals characterized by considerable bandwidths and fast changing envelopes. READ MORE