Multi-Rate Trellis-Coded Modulation for Multipath Fading Channels

多径衰落信道的多速率网格编码调制

• 批准号: 9161131
• 负责人: Jay Jacobsmeyer
• 金额: $ 5万
• 依托单位: ENSCO Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1992-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9161131&HistoricalAwards=false
• 关键词: Multi; Rate; Trellis; Coded; Modulation

This project is funded under the National Science Foundation's (NSF) Small Business Innovation Research (SBIR) program, which is designed to provide an opportunity for small business, particularly the small high technology firm, to participate in NSF research. Phase I of the SBIR program serves as a filter to select promising proposals and determine if the firm can do high quality research. Phase II is the principal research project. Phase III is the conversion of the NSF-funded research into commercial applications and technological innovation supported by follow-on private venture capital or other non-federal financing. This Phase I project addresses multipath fading on radio channels for high speed digital communications. The principal investigator is investigating a new approach that adapts the system data rate to the time-varying signal-to-noise ratio at the radio receiver. The objectives are to determine the feasibility of rate changing algorithms and adaptive synchronization; develop a measure of waiting time performance; and determine the effects of queueing, a noisy feedback channel, rate changing overhead, and propagation delay. The approach employs trellis coded modulation in an adaptive scheme where the data rate varies by changing the number of bits per channel symbol.

该项目由美国国家科学基金会 (NSF) 小型企业创新研究 (SBIR) 计划资助，该计划旨在为小型企业，特别是小型高科技公司提供参与 NSF 研究的机会。 SBIR 计划的第一阶段作为筛选器，选择有前景的提案并确定公司是否可以进行高质量的研究。 二期是主体研究项目。 第三阶段是将国家科学基金会资助的研究转化为商业应用和技术创新，并由后续私人风险投资或其他非联邦融资支持。 该第一阶段项目致力于解决高速数字通信无线电信道上的多径衰落问题。 首席研究员正在研究一种新方法，该方法可以使系统数据速率适应无线电接收器处随时间变化的信噪比。 目标是确定速率变化算法和自适应同步的可行性；制定等待时间绩效衡量标准；并确定队列、噪声反馈信道、速率变化开销和传播延迟的影响。 该方法采用自适应方案中的网格编码调制，其中数据速率通过改变每个信道符号的位数而变化。