Sökning: "trellis-coded modulation"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden trellis-coded modulation.

  1. 1. Joint Source-Channel Coding using Trellis Coded CPM

    Författare :Zihuai Lin; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; iterative decoding; serially concatenated CPM; punctured ring convolutional codes.; trellis coded quantization; turbo codes; turbo trellis coded modulation; soft decoding; ring convolutional coded CPM; continuous phase modulation; Joint source channel coding;

    Sammanfattning : The thesis investigates Joint Source and Channel Coding(JSCC) using combined Trellis Coded Quantization (TCQ) and coded modulation. First we investigate a JSCC scheme using combined TCQ/Trellis Coded CPM (TCQ/TCCPM). Based on the BCJR algorithm for trellis coded CPM, we derive an optimal soft decoding algorithm for the considered systems. LÄS MER

  2. 2. On trellis coded modulation for Gaussian and band-limited channels

    Författare :Jan-Erik Porath; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; intersymbol interference; transfer function bound; construction; convolutional codes; Trellis coded modulation; Ungerboeck codes; regularity;

    Sammanfattning : .... LÄS MER

  3. 3. Towards Fully Optimized BICM Transmissions

    Författare :Alex Alvarado; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; binary reflected Gray code; iterative decoding; pulse amplitude modulation; convolutional codes; trellis-coded modulation; coded modulation; Bit-interleaved coded modulation; quadrature amplitude modulation; hierarchical constellations; interleaver design;

    Sammanfattning : Bit-interleaved coded modulation (BICM) was introduced in 1992 as a new coded modulation (CM) scheme particularly well suited for fading channels and is nowadays considered the de facto CM scheme in wireless standards (HSPA, IEEE 802.11a/g/n, DVB-T2/S2/C2, etc.). LÄS MER

  4. 4. Spectrally Efficient Continuous Phase Modulation

    Författare :Tommy Svensson; Chalmers University of Technology; []
    Nyckelord :spectrum efficiency; Laurent decomposition; additive white Gaussian noise AWGN ; trellis coded modulation TCM ; non-linear channels; continuous phase modulation CPM ; maximum likelihood sequence detection MLSD ; distance spectrum; convolutional codes;

    Sammanfattning : Spectrally efficient continuous phase modulation (CPM) systems and generalizations of CPM for wireless links are considered. Continuous phase modulation defines constant envelope phase codes, which are advantageous when using non-linear amplifiers. LÄS MER

  5. 5. Trellis Code Multiple Access (TCMA) - Detectors and Capacity Considerations

    Författare :Fredrik Brännström; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; constellation-constrained capacity; iterative detection; interference cancellation; TCMA; TCM; trellis coded modulation; Trellis code multiple access; APP algorithm;

    Sammanfattning : .... LÄS MER