By choosing appropriate parameters of the noise and the system, the OAG of the system can be larger than one, i. e., the OAG of the noisy system can be larger than that of the noise free system.

• 选择适当的参数，系统输出幅度增益可以大于1，即有噪声时的系统输出平均幅度可以大于无噪声时的输出幅度增益。