Code Searches for Differential BICM
| Autor: | Wen-Yao Hsu, 許文耀 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 Bit-interleaved Coded Modulation (BICM) with iterative decoding (BICM-ID) are suitable for continuous fading channels. In addition, BICM-ID using differential encoding can avoid the rate loss due to pilot symbols. Conventional differential encoding for uncoded modulation was used for BICM-ID. In this thesis, we propose a new algorithm to optimize differential encoding for BICM-ID, and use it to find the differential encoding of 16APSK (amplitude and phase-shift keying). Besides, searches of the convolutional code for the proposed differential encoding are performed. Simulation results show that the proposed differential encoding has better error performance than conventional differential encoding, and the searched new convolutional codes can further improve error performance. On the other hand, Trellis-coded modulation using a delay processor (TCM-DP) is a coded modulation with a large minimum Euclidean distance. In this thesis, we also consider differential encoding for TCM-DP. Code searches for 8PSK (phase-shift keying) and 16APSK are done and simulation are given to show the advantage of the proposed scheme. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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