Research Initiation: Coherent Digital Communication on Fading Channels

本项目的目标是综合 数字实现的解调器架构， 接近理想的相干数字通信性能， 频率非选择性慢衰落信道 相干数字 通信性能提供了3 dB的改善， 最常用的衰落信道解调结构， 差分相干检测 数字实现的 架构是实现这种一致性的最佳方法， 因为他们拥有许多实践和理论知识， 优势 该项目的第一阶段侧重于开发 载波估计和符号估计的广义算法 解调 这项工作是发展相位估计 针对衰落信道和载波优化的算法， 频率不确定性 在第二阶段中，符号定时 估计和联合相位和符号定时估计 正在研究衰落信道。 这项工作将有助于生产 在衰落信道上具有接近最佳性能的调制解调器， 许多实际的优势。

The objectives of this project are the synthesis of digitally implemented demodulator architectures which achieve near ideal coherent digital communication performance in the frequency nonselective slow fading channel. Coherent digital communication performance provides a 3 dB improvement over the most commonly utilized fading channel demodulation architecture, differentially coherent detection. Digitally implemented architectures are the best method of achieving this coherent performance since they possess many practical and theoretical advantages. The first stage of this project focuses on the development of generalized algorithms for carrier estimation and symbol demodulation. This work is developing phase estimation algorithms optimized for the fading channel and a carrier with frequency uncertainty. In the second phase symbol timing estimation and joint phase and symbol timing estimation on the fading channel is being investigated. The work will help produce modems with near optimal performance on the fading channel with many practical advantages.