众所周知,现代潜艇由于能出其不意地对敌方发起突袭而被誉为战争中的一支“奇兵”,同时它也被公认为是未来核战争的一个“王牌”工具。然而,潜艇在作战 中的生存能力完全系于自身的隐蔽性。因为在海上,潜艇一旦被敌方的水面作战舰艇或飞机发现便很难逃脱被攻击的厄运。潜艇在执行潜行作战任务时,经常需要与岸基、舰载或空中指挥所进行必要的联络,以便获得必需的信息。为了让潜艇真正发挥水下伏兵和机动作战的作用,最好能使它在下潜状态中隐蔽完成必需的通信任务。目前,对潜通信常用极低频和甚低频这两种通信方式。 极低频(ELF)通信方式采用频率低于3000Hz的电磁波来传递信号。在这种方式下,潜艇可在100m左右的水下完成通信任务。极低频对潜通信有三个明显 As we all know, a modern submarine is hailed as a “model soldier” in the war for unexpected surprise attacks on the enemy. It is also recognized as a “trump card” for the future nuclear war. However, the survivability of the submarine in combat is entirely due to its own covert nature. Because at sea, the submarine once the enemy’s surface combat warships or aircraft found it difficult to escape the attack doom. Submarines often perform the necessary liaison with land-based, carrier-based or airborne command posts in the execution of stealth operations in order to obtain the necessary information. In order for the submarine to really play the role of underwater ambush and mobile combat, it is best to make it hidden in the dive state to complete the necessary communications tasks. At present, sub-communication commonly used very low frequency and very low frequency of these two kinds of communication. Very low frequency (ELF) communication uses electromagnetic waves with frequencies below 3000 Hz to transmit signals. In this way, the submarine can complete communication tasks under about 100m of water. Very low frequency submarine communication has three obvious