自适应系统中导频设计方案的研究

该文的目的是在导频辅助的自适应编码调制系统中，实现导频资源的优化配置，并研究新的设计方案对自适应系统性能的影响。利用衰落信道的二阶统计特性，以及信道的采样定理原理，推导出用以确定导频符号间隔的新算法，并由此定义了导频间隔的局部量和全局量，最终证明由新的导频间隔定义算法得到的局部量具有自适应特性，并且全局量是导频间隔的一个更紧更有效的上界。

Research on the Design of Pilot Symbols in Adaptive Systems

The purpose of the paper is to optimize the pilot symbols in adaptive pilot symbols assisted coded modulation systems and to study the influences of the new algorithm on the whole system performances. A new algorithm is found to determine the interval of pilot symbols according to sampling theory and the second order statistics of fading channels. The partial measure and global measure are defined. The adaptation of the partial measure and the efficiency of the global measure are proved. It is also found that the global measure is a tighter and efficient interval bound.