direct converter meaning in Chinese

直接变换变频

In this paper , microwave t / r front - end for short distance wireless communication is realized in miniature based on low cost mcm - l technology . the main jobs are as follows : 1 . the performances of i / q modulation and direct converter receiver are analyzed to set down the system scheme
主要工作包括以下几个方面: 1 .基于目前流行的数字中频接收技术,分析了i / q调制和直接变频接收机的性能,提出超外差变频的总体系统方案。