Analysis and design of iterative (turbo) digital receivers

该项目的目标是开发用于分析数字接收机中采用的迭代（所谓的“涡轮”）处理的方法，作为产生接近最佳性能的手段，即在不利条件下几乎无差错的通信。这一建议的及时性是由于数字通信日益深刻地融入现代生活的重要性。为了生产具有成本效益的产品，新的技术解决方案是“必须的”，因此不断部署研究工作来设计数字收发器。这项研究与所谓的涡轮码的发明有关，其迭代处理的突破性思想迅速扩展到许多应用中。利用“turbo”原理，将接收机分成相对较小的块（设备），局部处理数据，迭代交换可靠性信号，以达到全局最优处理。人们对涡轮处理越来越感兴趣的原因是，它产生了接近最优的解决方案，具有可管理的复杂性，使实际接收器的性能接近其理论极限。因此，分析迭代算法的理论和实践方面并研究其应用是非常重要的。

The objective of this project is to develop methods for analysis of iterative (the so-called "turbo") processing employed in digital receivers as a mean to yield close-to-optimal performance, i.e. almost-error-free communication in adverse conditions. The timeliness of this proposal is due to ever-growing importance of digital communications integrating profoundly the modern life. New technological solutions are "a must" to yield cost-effective products, so research efforts are continuously deployed to design digital transceivers. This research is related to the invention of the so-called turbo-codes, whose break-through idea of iterative processing was quickly extended on many applications. Using the "turbo" principle, the receiver is divided into relatively small blocks (devices) processing the data locally, and exchanging the reliability signals iteratively to approach the globally optimal processing. The reason behind the growing interest in turbo processing is that it yields close-to-optimal solutions with manageable complexity, bringing the performance of practical receivers close to its theoretical limits. It is, therefore, important to analyze theoretical and practical aspects of the iterative algorithms and study their applications.