Search for dissertations about: "multiuser detection."

Showing result 1 - 5 of 26 swedish dissertations containing the words multiuser detection..

2. 1. Multiuser detection in CDMA : combinatorial optimization methods

   Author : Peng Hui Tan; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; maximum-likelihood detection; optimization methods; multiuser detection; code-division multiple access system;

   Abstract : .... READ MORE

4. 2. Coding, Decoding and Multiuser Detection for Wireless CommunicationsCoding, Decoding and Multiuser Detection for Wireless Communications

   Author : Pål Orten; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; direct-sequence code division multiple access DS-CDMA ; sequential decoding; Rayleigh fading; multirate DS-CDMA; optimum distance spectrum; rate matching; rate compatible punctured convolutional codes; multiuser detection; nested codes;

   Abstract : In the strive for making the Universal Mobile Telecommunication System(UMTS) a reality, concepts and techniques are to be developed which canprovide both high system capacity and sufficient quality for the increasingnumber of mobile users. To obtain these objectives, powerful and flexibleerror control coding is needed, as well as efficient means for many usersto share the same commmication medium. READ MORE

5. 3. Channel Coding and Multiuser Detection for CDMA and Wireless Communications

   Author : Pål Orten; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rate compatible punctured convolutional RCPC codes; optimum distance spectrum ODS ; low-rate convolutional codes; interference cancellation; code-division multiple-access CDMA ; sequential decoding; automatic repeat request ARQ ; multiuser detection; maximum free distance MFD ; nested convolutional codes; tailbiting; rate matching;

   Abstract : Next generation wireless communication systems will require support for many different applications as well as improved quality compared to existing second generation systems like GSM (Global System for Mobile communications). Since there will be more users and higher data rates, the capacity must also be increased. READ MORE

6. 4. Serially Concatenated Space-Time Coded Continuous Phase Modulation

   Author : Dhammika Bokolamulla; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; serially concatenated codes; symbol-by-symbol {MAP} detection; factor graphs; sum-product algorithm; Iterative detection; multiuser detection; space-time codes; continuous phase modulation;

   Abstract : Certain problems associated with reliable digital wireless communication over a frequency-flat slow Rayleigh fadingchannel are treated, when the transmitted signal is modulated using continuous phase modulation (CPM) due to the desirable properties of CPM. The primary focus of attention is on detection strategies, and the thesis proposes iterative detection algorithms for CPM signals transmitted over frequency-flat slow Rayleigh fading channels. READ MORE

7. 5. Detection for multiple input multiple output channels : analysis of sphere decoding and semidefinite relaxation

   Author : Joakim Jaldén; Björn Ottersten; Zhi-Quan Luo; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telekommunications; MIMO; Detection; Sphere Decoder; Semidefinite Relaxation; Telecommunication; Telekommunikation;

   Abstract : The problem of detecting a vector of symbols, drawn from a finite alphabet and transmitted over a multiple-input multiple-output (MIMO) channel with Gaussian noise, is of central importance in digital communications and is encountered in several different applications. Examples include, but are not limited to; detection of symbols spatially multiplexed over a multiple-antenna channel and the multiuser detection problem in a code division multiple access (CDMA) system. READ MORE