Frequency specialization makes the communication value of broadcasting more concrete, and it is beneficial for radio stations to reorganize their resources and form integrated brand effect.
广播“频率专业化”使广播的传播价值由笼统变为具体，有利于电台重新组合各种资源，在整体上形成品牌效应。
Digital Audio broadcasting (DAB) has many outstanding advantages such as saving frequency resources, providing multimedia broadcasting services and receiving in mobile.
数字音频广播(DAB)具有节约频率资源、提供优质多媒体广播服务和能够移动接收的突出优点。
The characteristics of the digital television terrestrial broadcasting (DTTB) channels with long impulse responses are analyzed, and the frequency domain multipath channel model is given.
本文分析了数字电视地面广播通信信道具有长脉冲响应的多径衰落的特点，从频域上表达了其多径衰落信道模型；
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