CAREER: Robust Coded Modulation for Fading Channels and Rate-Compatible Puncturing

本研究探讨了增强通信系统鲁棒性和自适应双重特性的技术。鲁棒性允许相同的传输在各种信道条件下始终如一地工作，而自适应允许发射机专门化以匹配估计的信道和流量条件。我们建议研究五种具体的技术来提高实际系统的鲁棒性和适应性。首先，我们将开发新的高速率鲁棒网格码，以满足行业对数字音频广播和非对称数字用户循环鲁棒性的需求。其次，我们将确定新的速率兼容栅格码家族，为采用大型星座的传输提供速率灵活性。第三，我们将探讨串联码和迭代译码（即涡轮码）在鲁棒编码问题中的应用。第四个主题是研究鲁棒和速率兼容的栅格码的信道估计，第五个主题是研究信道估计精度如何影响Tomlinson-Harashima预编码可实现的信息速率。

The proposed research investigates techniques to enhance the dual properties of robustness and adaptivity in communications systems. Robustness allows the same transmission to work consistently well for a wide variety of channel conditions while adaptivity permits transmitter specialization to match estimated channel and traffic conditions. We propose investigation of five specific techniques for improving robustness and adaptivity in practical systems. First, we will develop new high-rate robust trellis codes to meet industry needs for robustness in digital audio broadcast and asymmetric digital subscriber loops. Second, we will identify new families of rate-compatible trellis codes that provide rate flexibility for transmissions employing large constellations. Third, we will explore the application of concatenated codes and iterative decoding (i.e. turbo codes) to the robust coding problem. The fourth topic is the investigation of channel estimation for robust and rate-compatible trellis codes, and the fifth topic is an examination of how channel estimation accuracy affects the information rates achievable with Tomlinson-Harashima precoding.