Search for dissertations about: "Multi-channel communications"

Showing result 1 - 5 of 8 swedish dissertations containing the words Multi-channel communications.

2. 1. Mobility and Multi-channel Communications in Low-power Wireless Networks

   Author : António Gonga; Mikael Johansson; Riku Jäntti; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mobility; Multi-channel communications; Neighbor Discovery; MAC Protocols; Low-power Wireless Networks; Electrical Engineering; Elektro- och systemteknik;

   Abstract : The prospect of replacing existing fixed networks with cheap, flexible and evenmobile low-power wireless network has been a strong research driver in recent years.However, many challenges still exist: reliability is hampered by unstable and burstycommunication links; the wireless medium is getting congested by an increasingnumber of wireless devices; and life-times are limited due to difficulties in developingefficient duty-cycling mechanisms. READ MORE

4. 2. Multirate Schemes and Multiuser Decoding in DS/CDMA Systems

   Author : Tony Ottosson Gadd; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multi processing-gain; multi-channel; soft decoding; vector quantization.; joint optimization; Direct-Sequence Code Division Multiple-Access DS CDMA . multirate; multi-modulation; multiuser detection;

   Abstract : Direct-Sequence Code Division Multiple-Access (DS/CDMA) has for some yearsbeen considered as a candidate for future personal and mobile communications.The reasons are mainly the properties of universal frequency reuse andthe multi-path mitigation. READ MORE

5. 3. Strategies for enhancing consumer interaction in electronic retailing

   Author : Christian Persson; Nils Enlund; Arne Krokan; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; e-commerce; consumers; interaction; autonomous agents; personalization; hypermedia interface; broadband; multi-channel retailing.;

   Abstract : .... READ MORE

6. 4. Digital Compensation Techniques for Transmitters inWireless Communications Networks

   Author : Efrain Zenteno; Peter Händel; Magnus Isaksson; Thomas Brazil; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Digital compensation; MIMO; wireless communications; satellite; Volterra; Amplfiers; HW effects; Informations- och kommunikationsteknik; Information and Communication Technology;

   Abstract : Since they appeared, wireless technologies have deeply transformed our society. Today, wireless internet access and other wireless applications demandincreasingly more traffic. However, the continuous traffic increase can be unbearableand requires rethinking and redesigning the wireless technologies inmany different aspects. READ MORE

7. 5. 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