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

职业：用于衰落信道和速率兼容穿孔的鲁棒编码调制

• 批准号: 9733089
• 负责人: Richard Wesel
• 金额: $ 23.5万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9733089&HistoricalAwards=false
• 关键词: CAREER; Robust; Coded; Modulation; Fading

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.

拟议的研究调查了增强通信系统鲁棒性和适应性双重特性的技术。 鲁棒性允许相同的传输在各种频道条件下始终如一地工作，而适应性允许发射器专业化以匹配估计的渠道和交通状况。 我们建议研究五种特定技术，以改善实际系统的鲁棒性和适应性。 首先，我们将开发新的高利率稳健格子码，以满足数字音频广播和不对称数字订户循环中稳健性的行业需求。 其次，我们将确定兼容速率兼容的格子码的新家族，这些家族为使用大型星座提供了速率灵活性。 第三，我们将探索串联代码和迭代解码（即涡轮代码）的应用到可靠的编码问题。 第四个主题是对稳健和兼容的格子码的渠道估计的研究，第五个主题是对渠道估计准确性如何影响Tomlinson-Harashima预编码可实现的信息率的检查。