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电子设备工作于机械振动较强的环境下,频率源的相位噪声会恶化,从而使通信系统不能正常工作。该文对某QPSK系统中频率源相位噪声因机械振动环境而恶化的问题进行了理论分析、仿真、试验等研究,提出通过选用加速度灵敏度更低的晶振,及更好地阻尼到晶体本身的力传递后,解决了整机无法减振的情况下如何在电路上进行减振的难题,使该QPSK系统正常工作。该方法具有很实际的应用价值和一定的学术价值。
Electronic equipment working in a strong mechanical vibration environment, the phase noise of the frequency source will deteriorate, so that the communication system does not work properly. This paper presents a theoretical analysis, simulation and experiment on the problem that the phase noise of the frequency source degrades due to mechanical vibration in a QPSK system. It is proposed that by choosing a crystal with lower acceleration sensitivity and better damping force to the crystal itself After delivery, the problem of how to reduce vibration on the circuit under the condition that the whole machine can not reduce the vibration is solved, and the QPSK system works normally. The method has a very practical value and a certain academic value.