提出了在架线电机车载波通信系统中，用数字通信取代模拟通信方式。
A digital communication system is introduced to replace analog system used in underground locomotive carrier communication system.
模拟结果表明引入子载波分组后系统性能依然保持良好，并且信道估计偏差对本算法的影响较小。
Simulation results show that subcarrier grouping just has a little influence on system performance. Meanwhile the imperfect channel estimation has little effects on the present algorithm.
使用正交模拟锁相环路对无载波的脉冲无线电系统实现多径捕获和同步提取。
The orthogonal analog phase lock loop is used to get the timing information of the impulse radio system and the multi-path component separation.
分析了相位载波(PGC)技术的模拟数字混合解调方案，提出了一种改进的模拟数字混合系统。
An improved analog-digital mixed system is put forward on the bases of scheme of phase generated carrier (PGC).
分析了相位载波(PGC)技术的模拟数字混合解调方案，提出了一种改进的模拟数字混合系统。
An improved analog-digital mixed system is put forward on the bases of scheme of phase generated carrier (PGC).
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