中文摘要：

研究了罗兰C脉冲内频率调制,理论分析了各调制方式对罗兰C定位接收机的影响及其数据传输率。研究结果表明：我国罗兰C台链通过脉冲频率二阶16级调制能满足WAAS地面通信网络的要求,且该调制方式兼容于定位接收机。

英文摘要：

This paper researched the intrapulse frequency modulation of Loran C in detail and investi- gated theoretically the data rate and interference to positioning receiver by each IFM. The results show that Loran C chain with two-stage 16-level IFM can fulfill the requirements of WAAS terrestrial communication network and that this modulation mode is compatible with the positioning receiver.