CAJ | 학술논문

DRM（Digital Radio Mondiale）保留了传统模拟调幅广播的优点，解决了其诸多的缺点，其为调幅广播带来了新的发展机会和空间。随着世界各国对DRM的不断重视，DRM系统将会逐渐普及。在调幅广播到DRM系统的过渡阶段，DRM信号可能会对调幅广播信号造成干扰。本文在对DRM信号和模拟调幅广播信号分析的基础上，结合模拟调幅广播接收机的解调电路的基本特点和人耳听阈的基本特征，描述了DRM对调幅广播的影响。同时，提出了模数同频保护率的定义及其计算方法。
DRM（Digital Radio Mondiale）보류료전통모의조폭엄파적우점，해결료기제다적결점，기위조폭엄파대래료신적발전궤회화공간。수착세계각국대DRM적불단중시，DRM계통장회축점보급。재조폭엄파도DRM계통적과도계단，DRM신호가능회대조폭엄파신호조성간우。본문재대DRM신호화모의조폭엄파신호분석적기출상，결합모의조폭엄파접수궤적해조전로적기본특점화인이은역적기본특정，묘술료DRM대조폭엄파적영향。동시，제출료모수동빈보호솔적정의급기계산방법。
Keeping the strong point of conventional AM broadcasting and solving the drawbacks of it,the advent of DRM （ Digital Radio Mondiale） is a new chance for the development of AM broadcasting. With the concerns of DRM all over the world, DRM system will become more and more popular. In the transition from AM system to DRM system,DRM signal will probably make the interference with AM signal. In this paper based on the analysis of DRM signal and AM signal,with the feature of demodulation circuit in conventional AM broadcasting receiver and the characteristic of the auditory threshold, the interference is described. Moreover the definition of AM and DRM Co Channel Protection Ratio is presented, and the calculation method is provided.