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HFDL an automatic communications system

机译：HFDL自动通信系统

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HFDL, as a mode, has been around for quite some time now and is well established with most major airlines. Development of HFDL was driven by the need for more sophisticated and automatic communication systems between aircraft and the ground services. Whilst VHF ACARS provides a useful service for short-haul flights, a system was required that could provide similar communications when aircraft were on long-haul flights over remote areas. The solution was to make use of the aircraft's HF capabilities as they are ideal for long distance communication. The development linked well with the increasing sophistication of microelectronics, which made the use of fairly complex and robust modulation systems viable. The driving force behind the introduction and ongoing success of HFDL has been ARINC.
机译：HFDL作为一种模式已经存在了很长一段时间，并且在大多数主要航空公司中都得到了很好的确立。飞机和地面服务之间需要更先进，更自动的通信系统，推动了HFDL的发展。 VHF ACARS为短途航班提供了有用的服务，但当飞机在偏远地区进行长途飞行时，仍需要一个可以提供类似通信的系统。解决方案是利用飞机的HF功能，因为它们是长距离通信的理想选择。这种发展与微电子技术的日益成熟紧密相关，微电子技术使得使用相当复杂和强大的调制系统成为可能。引入HFDL并持续取得成功的推动力一直是ARINC。

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