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传统的模拟调幅广播波(AM)易受外部信号、杂波等干扰使得传输质量差,且业务单一,AM广播的数字化,可以使声音质量得到明显的改善,可以通过传输附加数据,来拓展业务使广播节目变得丰富多彩,也可使接收机的操作变得简单容易。AM发射功率中很大一部分是用于载波,运营成本很高,数字化可大大降低发射功率,降低运营成本,还有可以在很大的范围内同频广播。频谱利用率很高。
The traditional analog AM broadcast wave (AM) vulnerable to external signals, clutter and other interference makes the transmission quality is poor, and a single business, AM broadcast digital, can make the sound quality significantly improved, you can transfer additional data to expand business Make the radio program rich and colorful, but also make the operation of the receiver becomes simple and easy. Much of the AM transmit power is used for carriers, operating costs are high, digitization can greatly reduce transmit power, reduce operational costs, and can be broadcasted on the same frequency. High spectrum efficiency.