中波调幅广播的发展方向

The Trend of Medium Wave AM Broadcast

调幅立体声作为80年代发展起来的一项新技术日前在中波调幅广播中已处于逐步成熟与完善的阶段。本文详细介绍这项技术的发展历史以及与日前调频立体声的比较,并解释了调幅立体声中应用最广泛的美国MOTOROLA公司兼容正交调制(C—QuAM)的原理与发射系统。

AM stereo broadcast has been a new technique developed in 80s and got matuirity and perfection more and more. This paper introduces history of this technique development in detail and in comparison with FM stereo now. The principle of compatible quadrature modutation(C-QuAM) of America Motorola Corporation is explained in the paper.