最佳调制编码方案在移动数字、图像传输系统中的研究

Digital mobile communication systems in the future will develop toward the.direction of large capacity and multimedia transmissions. In these systems, the frequency resource will be further limited and in the same time the requirement to the reliability for the transmission will be higher and higher. Therefore the research on.how to find a kind of novel coded modulation scheme not only with power efficiency but also with frequency efficiency is of important significance.In this project we focus our research on the following important and basic problems in the designing of an optimal MLC/MSD coded modulation scheme applied in Rayleigh fading channels. They include: optimal non-Euclidean metric, reasonable.choice for code rate by the channel capacity rule, different mapping and set partitioning strategies for the signal constellations, comparision on performance between two different decoding methods--- MLC/MSD and MLC/PDL, comparison.on performance of hard decision decoding and soft decision decoding and so on. We also discuss the application of MLC in image transmission by using the unequal error protection (UEP) characteristics of MLC in AWGN and Rayleigh fading channels respectively

将针对下一代移动衰落环境中同时传输数字、图像业务的可靠性问题，以两种不展宽频带的调制编码方案：TCM和BCM为主要研究对象，分别讨论它们在数字及图像信源情况下，应用于移动衰落信道中的综合性能，找出既节省频带资源又具高可靠性的一体化方案。为以高质量、大容量、综合业务为主要标志的下一代移动通信系统的设计进行前瞻性研究。...