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介绍了工作于调幅波段的美国ＩＢＯＤ数字音频广播系统的结构和技术特点。该系统是一个多载波调制系统，不占用新的频带，支持模拟和数字广播的同播
The structure and technical features of the American IBOD digital audio broadcasting system operating in the amplitude modulation band are introduced. The system is a multi-carrier modulation system, does not take up the new band, support simulcast and digital broadcast simulcast