CAREER: Coding for Wireless Communications

职业：无线通信编码

• 批准号: 9984237
• 负责人: Tolga Duman
• 金额: $ 22.5万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-05-15 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9984237&HistoricalAwards=false
• 关键词: CAREER; Coding; Wireless; Communications

Abstract:---------The demand for voice and data transmission over wireless channels isincreasing at a tremendous pace. Unfortunately, the characteristics ofthe wireless channel (e.g., fading and interference) impose obstaclesfor satisfying this demand. The single most effective technique toaccomplish reliable communication over a fading channel is ``diversity''which attempts to provide the receiver with independently faded copiesof the transmitted signal. Channel coding may also be used to provide(a form of time) diversity for immunization against the impairmentsof the wireless channel. In addition, various diversity techniques maybe combined to further improve the system performance in a wirelessenvironment. Space-time coding which combines channel coding with spacediversity is a recent example of combining different diversity techniquesand has proven to be effective in providing high data rates over fadingchannels. This research involves development of new channel coding techniquesfor the wireless link. In particular, coded modulation techniques formultiple transmit and multiple receive antenna systems over blockfading channels are developed. A significant part of the research includesdevelopment of turbo (based) coded modulation techniques as an alternativeto the current space-time codes. In addition, the investigators study theuse of multilevel codes and bit interleaved coded modulation schemes forsystems with antenna diversity. They conduct a theoretical performanceanalysis of various coded modulation systems, develop code designprinciples, and devise simpler and efficient decoding algorithms. Inaddition, they consider practical issues including the evaluation of codeperformance in the presence of interference.

翻译后摘要：-无线信道上的语音和数据传输的需求正在以巨大的速度增长。不幸的是，无线信道的特性（例如，衰落和干扰）对满足这种需求造成了障碍。在衰落信道上实现可靠通信的唯一最有效的技术是"分集“，它试图为接收机提供发射信号的独立衰落副本。信道编码还可以用于提供（一种形式的时间）分集，以针对无线信道的损害进行免疫。此外，可以结合各种分集技术来进一步改善无线环境中的系统性能。空时编码结合了信道编码和空间分集技术，是近年来结合不同分集技术的一个例子，并已被证明能有效地在衰落信道上提供高数据速率.这项研究涉及到无线链路中新的信道编码技术的发展。特别是，编码调制技术formultiple发送和多接收天线系统在块衰落信道的发展。研究的一个重要部分是发展Turbo编码调制技术作为当前空时编码的替代方案。此外，研究人员还研究了多级编码和比特交织编码调制方案在天线分集系统中的应用。他们进行各种编码调制系统的理论性能分析，开发代码设计原则，并设计更简单，更有效的解码算法。此外，他们考虑的实际问题，包括在干扰的存在下的代码性能的评估。