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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。
Medium wave single sideband stereo broadcast transmission system, in addition to requiring high quality transmission of information, due to its larger transmit power, so how to improve the transmitter efficiency is also a crucial issue. The single-sideband stereo broadcasting system can not apply common AM broadcasting system in high-power transmission. According to the principle of “envelope suppression reconstruction method”, an all-digital high-efficiency and high-power transmission system is proposed. The digital broadband phase shifter replaces the analog circuit Phase shifter to achieve 90 ° phase shift, from the theoretical analysis, and made a computer simulation test shows that the program is reasonable.