CAJ | 학술논문

在语音通信中，需要克服由于干扰、音频源的不稳定等因素导致的语音信号忽大忽小问题，使得发射的音频信号幅度能够稳定。通过对音频信号幅度的大小以及变化速度等特点的分析，在传统的自动增益控制（AGC）算法的基础上提出了实用的 AGC 算法，并在 FPGA 上实现。实验结果表明上述算法不仅有效改善音频信号输出幅度不稳的问题，也避免了 AGC 调整之后音频失真的问题。相关结论已应用于某发射机中音频信号处理部分。
재어음통신중，수요극복유우간우、음빈원적불은정등인소도치적어음신호홀대홀소문제，사득발사적음빈신호폭도능구은정。통과대음빈신호폭도적대소이급변화속도등특점적분석，재전통적자동증익공제（AGC）산법적기출상제출료실용적 AGC 산법，병재 FPGA 상실현。실험결과표명상술산법불부유효개선음빈신호수출폭도불은적문제，야피면료 AGC 조정지후음빈실진적문제。상관결론이응용우모발사궤중음빈신호처리부분。
In order to ensure amplitude stability of the received signal, it is necessary to eliminate variations of the transmitted signal amplitude caused by noise, transmission distance and so on in audio communication. Through analyzing the characteristics of audio signal amplitude, a new and practical algorithm of AGC based on conventional algorithm is proposed, and implemented on FPGA. The experiment result indicates that the proposed algorithm is efficient in resolving variations of the transmitted signal amplitude and avoiding distortion of the audio signal after processed by AGC. The correlative conclusions are now applied in the audio signal processing portion of certain exciter.