Sökning: "serially concatenated codes"

Visar resultat 1 - 5 av 19 avhandlingar innehållade orden serially concatenated codes.

1. 1. Sparse Codes on Graphs with Convolutional Code Constraints

   Författare :Muhammad Umar Farooq; Kommunikationsteknologi; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Braided codes; Density evolution; Serially concatenated codes; Spatially coupled codes; Generalized LDPC codes; threshold saturation; Turbo codes;

   Sammanfattning : Modern coding theory is based on the foundation of the sparse codes on graphs, such as the low-density parity-check (LDPC) codes, and the turbo-like codes (TCs) with component convolutional codes. The success of the LDPC codes and the TCs lies in their ability to perform low-complexity iterative message passing decoding procedures. LÄS MER

3. 2. In-Line Bit Interleaved Serially Concatenated Coded Modulation

   Författare :ANDERS NILSSON; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; serially concatenated codes; the AWGN channel.; Coded modulation; iterative decoding; in-line bit interleaving; turbo codes;

   Sammanfattning : A communication system using in-line bit interleaved serially concatenated trellis coded modulation (SCTCM) over the additive white Gaussian noise (AWGN) channel is investigated. In-line bit interleaving refers to an interleaving method for which the random bit interleaver is divided into several independent constituent bit interleavers. LÄS MER

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

   Författare :Dhammika Bokolamulla; Chalmers tekniska högskola; []
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER

5. 4. Serially concatenated systems : an iterative coding approach with application to continuous phase modulation

   Författare :Pär Moqvist; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; APP algorithm; concatenated codes; iterative decoding; MAP detector; continuous phase modulation; serial concatenation;

   Sammanfattning : .... LÄS MER

7. 5. Some concatenated and iterative decoding approaches for continuous phase modulation

   Författare :Ming Xiao; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; serially concatenated codes; Continuous phase modulation;

   Sammanfattning : Several concatenated and iterative decoding approaches are used toimprove the power efficiency of continuous phase modulation (CPM).First a symbol interleaver is used for serially concatenated CPM(SCCPM). Convergence of iterative decoding for this scheme can beearlier (lower SNR: Signal-to-Noise-Ratio) compared to bitinterleaved SCCPM. LÄS MER