在追求“零”时延使用体验的未来通信系统中，为达到系统内部各个模块的极致性能所付出的代价难以承受。因此，以系统整体性能为导向的模块联合优化，有望成为无线通信系统设计的新趋势。本项目从信源编码后的残留冗余信息入手，提出一种联合信源信道编码调制技术，并研究匹配时变多径信道的设计：1) 依据原模图低密度奇偶校验码的特性，提出一种新的概率幅度成形算法，通过利用信源编码后的残留冗余信息使得传输信号具有靠近信道容量的最优概率分布，实现低功耗传输；2）提出引入信源编码残留冗余信息的多重迭代Turbo均衡，并利用改进的有限长联合原模图外信息转移算法与差分进化算法，寻求匹配码间干扰信道的信源、信道码型联合优化方案，提高传输可靠性；3) 构建系统参数优化模型，设计自适应机制以匹配信道的时变特性。本项目将为低功耗高可靠的自适应无线传输系统研究开辟一种新思路，对促进传输系统的整体设计具有重要的推动作用。

In the future communication system which pursues zero-delay performance, the cost of achieving the ultimate performance of each module in the communication system is unbearable. Therefore, the joint optimization of modules based on the best system performance is promising to be a new trend of wireless communication system design. This project proposes a joint source channel coded modulation technology, and studies the matching design in the time-varying multipath channel by using the residual redundant information left by source coding. First of all, we propose a new probabilistic amplitude shaping algorithm according to the property of protograph low-density parity-check codes. In the algorithm, the residual redundant information can be used to form the transmit symbols with the best distribution, which is near the channel capacity. Thus, the low power consumption can be ensured. Second, we propose the multi-iterative Turbo equalization by introducing the residual redundant information left by source coding. Also, a joint optimization scheme of source and channel codes is proposed to match to the characteristics of ISI channels via an improved finite-length joint protograph extrinsic information transfer algorithm and differential evolution algorithm, which enhances the reliability of transmission. Finally, we build the optimization model on the key parameters of the proposed system, and then design an adaptive mechanism. Thus, the transmission rate can be enhanced. The project proposes a new design of an adaptive wireless transmission system with low power and high reliability. Furthermore, the implement of this project plays an important role in promoting the overall design of transmission systems.