一种船舶自动识别系统甚高频信道的低成本设计

摘要

With increasing competition in Automatic Identification System( AIS) market, low-cost design is the inevitable trend in AIS product development. This paper presents a low-cost Very High Frequency (VHF) channel design scheme of AIS system according to the International Maritime Organization(IMO) standards. The working principle of AIS and working process of its VHF channel are introduced briefly, a concise and practical transmitter and receiver design is given. And the design method,components selec-tion of some core units,such as modulator,VHF power-amplifier and demodulator are elaborated. The test and field practice show that all indexes of the VHF channel meet the specified requirements,further more, the VHF channel has low hardware cost and has reliable performance.%随着船舶自动识别系统( AIS)市场竞争的日益激烈，低成本化是AIS产品研制的必然趋势。根据国际海事组织( IMO)有关标准，给出了一种AIS甚高频( VHF)信道的低成本设计方案。介绍了AIS工作原理及其VHF信道的工作过程，给出了简洁实用的发射机和接收机设计，并对调制器、VHF功放、解调器等核心单元设计方法、器件选择进行了详细阐述。测试和外场实用表明该VHF信道各项指标均已达到规定要求，并且该VHF信道硬件成本低，性能可靠。