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Turbo)处理的方法，作为一种手段来产生接近最佳的性能，即在不利条件下几乎无差错的通信。这一提议的及时性是因为数字通信日益重要，它深刻地融入了现代生活。新的技术解决方案是生产高性价比产品的必由之路，因此不断地开展研究工作来设计数字收发机。这项研究与所谓的Turbo码的发明有关，其迭代处理的突破思想迅速扩展到许多应用中。利用Turbo原理，将接收器划分为相对较小的块(设备)，在本地处理数据，并迭代地交换可靠性信号，以逼近全局最优处理。人们对Turbo处理越来越感兴趣的原因是，它产生了复杂性可控的近乎最佳的解决方案，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它们的应用是很重要的。

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.