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在解调型应答机中,解调的基带信号和伴随的噪声一起再调制和转发。本文针对线性通道中相干解调、有预限幅的相干解调和鉴频解调三种情况,分析了转发噪声与系统参数的关系。理论分析已为实验所证实。本文结果可用于无线电测轨或数据传输系统的设计。
In a demodulation type transponder, the demodulated baseband signal is remodulated and retransmitted along with the accompanying noise. In this paper, three cases of coherent demodulation in linear channel, coherent demodulation with pre-limiting amplitude and frequency demodulation are analyzed. The relationship between retransmission noise and system parameters is analyzed. Theoretical analysis has been verified by experiments. The results of this paper can be used in the design of radio orbit or data transmission systems.