Search for dissertations about: "3g problem"

Showing result 1 - 5 of 7 swedish dissertations containing the words 3g problem.

2. 1. Mobile Multimedia Multicasting in Future Wireless Systems : A Hybrid Cellular-Broadcasting System Approach

   Author : Aurelian Bria; Jens Zander; Ralf Tönjes; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 3G; DVB-H; wireless; multicasting; multimedia; broadcasting; Telecommunication; Telekommunikation;

   Abstract : This dissertation addresses the problem of providing a®ordable mobile mul-timedia services in wide area wireless networks. The approach is to con-sider novel system architectures, based on reusing and sharing of the ex-isting network infrastructure for cellular and terrestrial TV broadcastingsystems. READ MORE

4. 2. Pilot power management in radio network planning for WCDMA networks

   Author : Iana Siomina; Linköpings universitet; []
   Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

   Abstract : The high price of auction-based 3G licences and the growing competition in telecommunications market is putting enormous pressure on manufacturers and operators to configure the next-generation mobile network in the most cost-effective way possible providing high quality 3G services. Therefore, aiming to improve overall network performance and to ensure efficient utilization of network resources, radio network planning and optimization became even more important thar. READ MORE

5. 3. Space-Time Processing Applications for Wireless Communications

   Author : Tommy Hult; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Space-Time Processing; Polarization; MIMO; Diversity; HAP;

   Abstract : Wireless mobile communication networks are rapidly growing at an incredible rate around the world and a number of improved and emerging technologies are seen to be critical to the improved economics and performance of these networks. The technical revolution and continuing growth of mobile radio communication systems has been made possible by extraordinary advances in the related fields of digital computing, high-speed circuit technology, the Internet and, of course, digital signal processing. READ MORE

6. 4. Three problems with internetworking in cellular networks

   Author : Lars-Åke Larzon; []
   Keywords : ;

   Abstract : Over the last decade, cell phones have gone from providing the traditional interactive voice service to also include support for Internet services. Cellular networks that originally were designed for cost-efficient voice services supply low bandwidth, high error rates and long round-trip delays, which poorly fit the generous header sizes, lack of error tolerance and reliance on retransmissions of the Internet. READ MORE

7. 5. Joint Pose and Radio Channel Estimation

   Author : Anders Mannesson; Institutionen för reglerteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : This thesis investigates the combination of pose and radio channel estimation. Pose is the knowledge of the position and orientation of a device whereas the radio channel describes the transmission medium between radio transmitters and receivers. READ MORE