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�������պ����ѧѧ�� 2002, Vol. 28 Issue (2) :144-148    DOI:
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Prediction of Output SNR of Analog Optic Receiver
NI Nan, SU Guo-bin, LI Zheng, LIU Jian-sheng*
Beijing University of Aeronautics and Astronautics, Dept. of Electronic Engineering

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ժҪ �Բ���ѩ���������ܺ��黯�س�ЧӦ��ǰ�����(APD-GaAsFET)��ģ�����ջ�����,���亯����Ƶ����������������������,�����������,������һ�ַ��������������Ƶ���Բ�����������������ȴ��۵ķ���,���õ����õ�ͨ�˲������������Ƶ����ʱ,�������ȸ��ƵĶ�����ϵ.�Ƶ���������������ʱ��ʽ��APD-GaAsFETģ�����ջ��ձ�����.
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Abstract�� The amplitude-frequency characteristic of transmission function of APD GaAsFET analog optic receiver is usually nonideal in stopband. For this reason, the output Signal Noise Ratio(SNR) is often lowered. A method is proposed to analyze and calculate the lowered output ��SNR�� caused by the nonideal stopband characteristic. A quantitative relation is established using a low-band filter, which helps to improve the output SNR. The output noise formula of this paper is universally applicable to APD-GaAsFET analog optic receiver.
Keywords�� signal-noise ratio   transmission characteristics   analog transmission systems     
Received 2000-06-26;
About author: �� �(1975-),��,������,˶ʿ��,100083,����.
���, �չ���, ���, ����ʤ.ģ�����ջ��������ȵļ���[J]  �������պ����ѧѧ��, 2002,V28(2): 144-148
NI Nan, SU Guo-bin, LI Zheng, LIU Jian-sheng.Prediction of Output SNR of Analog Optic Receiver[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2002,V28(2): 144-148
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