【摘要】 中波单边带立体声广播发射系统，除要求高质量传送信息外，由于其发射功率较大，因此，如何提高发射机效率也是至关重要的问题。单边带立体声广播系统在大功率发射方面不能套用普通调幅广播系统，本文根据“包络抑制重建法”原理，提出一种全数字化的高效大功率发射系统，以数字宽带移相器代替模拟电路移相器实现９０°相移，从理论上进行分析，并用计算机作了模拟试验，说明该方案是合理的。更多还原

【Abstract】 The MW SSB stereo broadcasting system requires high efficiency of the transmitter which usually employs high power amplifier,as the high quality of information transmission is important.The conventional AM DSB transmitters are not suitable for high efficiency SSB stereo broadcasting.In this paper,a fully digitalized high-efficiency high power transmitter system based on the EER principle is presented.Also a digitalized wideband 90°phase shifter is suggested to replace the analog wideband phase shifter.The theoretical analysis and computer simulation show that the proposed method is feasible.更多还原