长波通信

中长波通信是我军重要通信手段之一。

MF / LF communication is one of our armys important communication methods .

实现BPL长波信道通信能力扩展的一个重要技术环节是对组重复间隔（GRI）脉冲的脉位调制。

The PPM ( Pulse Positioning Modulation ) of the BPL signal is the key problem to expanding the BPL channel as a communication channel .

现代舰船通信设备包括了各种短、中、长波的射频通信，以及古老的灯光通信，已经发展成一个成熟的系统。

Modern warship communication equipment including a variety of short , medium and long wave radio frequency communication and even the old light communication , has grown into a mature system .

当人们为了追求通信容量和多种业务，不断地开发超短波、微波等更高的无线电频段时，传统的长波、中波通信因为失去原有的优势，只能在特殊的场合找到应用。

When people consequently exploit super short wave and microwave radio frequency band for Communication capacity and multimedia facilities , the traditional long wave communication and medium one lost original priority , and they only can be used for some special occasion .

提出了一个增益自动控制的级联EDFA系统，通过对掺铒光纤光放大理论模型的数值模拟，论证了它在高速长波长星间光通信系统中应用的可行性。

A cascaded EDFA system which is automatic gain controlled has been developed , and We demonstrate the feasibility of its application in the high speed long wavelength intersatellite optical communication through numerical analogue based on the theoretical model of Er 3 + doped fiber amplifier .

高速长波长星间光通信中掺铒光纤放大器应用的理论研究

Theoretical Study on the Application of Er 3 + Doped Fiber Amplifier in High Speed Long Wavelength Intersatellite Optical Communication