基于DVB_C标准的数字电视系统采用正交幅度调制(QAM)传送信号。

Quadrature Amplitude Modulation (QAM) is used to transfer signals by digital TV system based on DVB_C standard.

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首先介绍从信号幅度、相位、频率及功率谱等特性中提取的三种特征参数，应用这三种参数采用人工神经网络对模拟调制信号进行了识别。

Three features parameters derived from the instantaneous amplitude, instantaneous phase, instantaneous frequency and power spectrum of analogue modulated signals are presented in this article.

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提出并实现了采用主动温度反馈控制电光晶体温度对剩余幅度调制变化的抑制。

An active temperature feedback method is proposed and demonstrated to suppress the RAM fluctuation by controlling the EOM temperature.

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