In this paper, the distribution of pilot symbols in the time-frequency lattice of a multicarrier system for HF communications has been analysed. The pilot density of an OFDM modem based on the HFDL standard can be reduced, so the data rate can be about 3600 bit/s. An hexagonal pilot pattern has been proposed and compared with rectangular geometries. Hexagonal distribution of the pilots is optimum in terms of sampling efficiency and it provides better performance in terms of BER.
展开▼
机译：本文分析了用于HF通信的多载波系统的时频点阵中的导频符号分布。可以降低基于HFDL标准的OFDM调制解调器的导频密度，因此数据速率可以约为3600 bit / s。已经提出了六边形引导图案并将其与矩形几何形状进行比较。飞行员的六边形分布在采样效率方面是最佳的，并且在BER方面提供了更好的性能。
展开▼
