Sökning: "terminal antenna"

Visar resultat 16 - 20 av 29 avhandlingar innehållade orden terminal antenna.

1. 16. Smart Antennas in Wireless Networks : Systems Issues and Performance Limits

   Författare :Rickard Stridh; KTH; []
   Nyckelord :;

   Sammanfattning : This work deals with performance limits when using smartantennas in future wireless systems. The current evolution inthe field of wireless communication implicates a substantiallyincreased demand on transport capacity. Smart antennas is onevery powerful means to fulfill these demands. LÄS MER

3. 17. Evolution and Development of the Onychophoran Head and Nervous System

   Författare :Joakim Eriksson; Graham Budd; John Peel; Gerhard Scholtz; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Onychophora; Development; Nervous System; Immunohistochemistry; Gene Expression; Biologi; Biology; Biologi; zoologisk utvecklingsbiologi; Animal Development;

   Sammanfattning : Onychophorans are closely allied to the arthropods and possess a body organisation more similar to Middle Cambrian fossils than to recent arthropods. This means that onychophorans in some respects can be regarded as a model for the last common ancestor to both the Arthropoda and the Onychophora. LÄS MER

4. 18. On Cooperative Communications and Its Application to Mobile Multimedia

   Författare :Quang Trung Duong; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : With the rapid growth of multimedia services, future generations of wireless communications require higher data rates and a more reliable transmission link while keeping satisfactory quality of service. In this respect, multipleinput multiple-output (MIMO) antenna systems have been considered as an efficient approach to address these demands by offering significant multiplexing and diversity gains over single-antenna systems without increasing requirements on radio resources such as bandwidth and power. LÄS MER

5. 19. Coding and Transmission Strategies for Secrecy

   Författare :Mattias Andersson; Mikael Skoglund; Matthieu Bloch; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : In this thesis we consider several problems relating to information theoretic security. The wiretap channel is the simplest information theoretic setting which takes security into account, and in the first chapters of the thesis we design some practical coding schemes for this channel model. LÄS MER

7. 20. Radio Wave Propagation in Confined Environments - Measurements and Models

   Författare :Henrik Börjeson; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; radio wave propagation multipath channels loss measurement; Electronics; Elektronik;

   Sammanfattning : This thesis deals with radio wave propagation in environments where the propagation is severely influenced by surrounding objects, mainly walls and other building structures. As an introduction, a brief description is given on propagation terms like loss, delay and dispersion along with system functions relevant for the topic. LÄS MER