传统的无线电通信都是采用 “定频”(也叫固频)工作。无线电台 工作时,虽然可以适时更换通信频 率,但其变换周期比较长,相对来 说,其载波频率在一段时间内是固 定不变的。 现代战争中,随着电子斗争日 趋尖锐,“定频”通信正受到严重的 挑战。由于无线电波是沿空间传 播,通信时除了自己的联络对象能 收到外,敌方也能截获。敌方可使 用无线电测向仪,侦察我方电台的 Traditional radio communications are using “fixed frequency” (also known as fixed frequency) work. While working in a radio station, although the communication frequency can be changed in a timely manner, the conversion period is relatively long. Relatively speaking, the carrier frequency is fixed for a certain period of time. In modern warfare, “fixed frequency” communications are being seriously challenged as the electronic struggle becomes more acute. Because the radio waves are spread along the space, the enemy can intercept as well as their own contact object when communicating. The enemy can use the radio direction finder to detect our radio stations