Sökning: "Iterative receiver"

Visar resultat 11 - 15 av 36 avhandlingar innehållade orden Iterative receiver.

  1. 11. Interference Rejection in Wireless Communication Systems

    Författare :Anders Ranheim; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; direct-sequence spread spectrum; parameter estimation; multi-user detection; antenna array processing; iterative minimization; interference rejection; finite alphabet; order detection; signal structure; narrow-band interference;

    Sammanfattning : This thesis is concerned with the problem of interference rejection in wireless communication systems. Different solutions are proposed, depending on the type of system under study and the amount of knowledge available about the signal and the propagation environment. LÄS MER

  3. 12. Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels

    Författare :Adnan Prlja; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Digital data transmission; receivers; decoders; channel modeling; intersymbol interference; ISI; MIMO; Faster-than-Nyquist signaling; complexity reduction; observation models; BCJR algorithm; turbo equalization; iterative detection; channel shortening;

    Sammanfattning : Fast and reliable data transmission together with high bandwidth efficiency are important design aspects in a modern digital communication system. Many different approaches exist but in this thesis bandwidth efficiency is obtained by increasing the data transmission rate with the faster-than-Nyquist (FTN) framework while keeping a fixed power spectral density (PSD). LÄS MER

  4. 13. Iterative Detection, Decoding and Channel Parameter Estimation for Orthogonally Modulated DS-CDMA Systems

    Författare :Pei Xiao; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : In this thesis, we study iterative detection, decoding and channel parameter estimation algorithms for asynchronous direct-sequence code division multiple access (DS-CDMA) systems employing orthogonal signalling formats and long scrambling codes. Multiuser detection techniques are widely used to combat the detrimental effects of multipath fading and multiple access interference (MAI), which are the major impairments in CDMA communication systems. LÄS MER

  5. 14. Urban Travel Time Estimation from Sparse GPS Data : An Efficient and Scalable Approach

    Författare :Mahmood Rahmani; Harilaos Koutsopoulos; Nikolas Geroliminis; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; map-matching; path inference; sparse GPS probes; floating car data; arterial; urban area; digital road network; iterative travel time estimation; fixed point problem; Stockholm; taxi; Transportvetenskap; Transport Science;

    Sammanfattning : The use of GPS probes in traffic management is growing rapidly as the required data collection infrastructure is increasingly in place, with significant number of mobile sensors moving around covering expansive areas of the road network. Many travelers carry with them at least one device with a built-in GPS receiver. LÄS MER

  7. 15. A Cross-layered Pilot Scheme for IEEE 802.11p

    Författare :Keerthi Nagalapur; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vehicular communications; FPGA implementation; Channel Estimation; Cross-layer; Pilot Scheme; IEEE 802.11p; OFDM;

    Sammanfattning : Vehicular communication is expected to be a part of the future transportation system and promises to support a plethora of applications for traffic safety, traffic efficiency, and fuel efficiency. Traffic safety applications, such as collision avoidance, demand reliable communications with low latency. LÄS MER