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近年来国际上出现了利用调频（ＦＭ）广播副载波（副载频为６７ｋＨｚ或９２ｋＨｚ）进行高速数据传输的技术，这种技术采用双重调频（ＦＭ－ＦＭ）体制，具有数据传输速率高、网络建设费用节省、速度快、不需额外占用频率资源等优点。调频广播技术已走向成熟，且由于调频广播
In recent years, there has been an international technology that uses high-speed data transmission using FM subcarriers (subcarriers of 67 kHz or 92 kHz). This technique uses a dual-frequency modulation (FM-FM) system with high data transmission rate, Construction cost savings, speed, without additional frequency resources and other advantages. FM radio technology has matured, and due to FM radio