| Summary: | 碩士 === 國立雲林科技大學 === 通訊工程研究所碩士班 === 99 === There are some theses pointed that Superposition Coded Modulation is a flexible and efficient Coded Modulation system, it is easy to implement.The Superposition Coded Modulation can also support high throughput capacity. We based on a interleave division multiplexing (IDM) coded modulation scheme to achieve Superposition Coded Modulation (SCM) for multimedia transmission. Different to the conventional IDMA has to obtaining time in iterative detection process, we applying synchronous time acquisition scheme of IDMA to obtaining time before the iterative detection process in order to reduce the iterative time; After the MIMO-STBC encoded, and receiver used the iterative detection and decoding methods to recovery the multimedia data as well as we will analyze the performance that utilize iterative techniques to recovery video data. After simulated shows, we applying synchronous time acquisition before the iterative detection to reduce time of iteration. Besides, we using unequal error protection (UEP) transmission scheme to utilize layer-wire UEP scheme for H.264 which allocating higher-power to the high importance data layers and a lower-power to the low importance data layers, in order to enhance the overall video quality.
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