无线通信通话语音质量测量结果的不确定度评定

Analysis of Uncertainty in Measurement of Wireless Communication Speech Quality

在标准测试环境中测量手机通话语音质量,可评估手机抗击信道衰落的能力。本文分析了在电磁混响室中测量手机终端通话语音质量测量结果的不确定度,分A类评定方法和B类评定方法进行评定,测量不确定度影响量包括四个主要因素:测量结果的重复性;直放站外接天线处的语音质量;混响室内搅拌桨的桨叶位置变化;语音质量测量试验装置测量准确度。

The measurement results of cellphone speech quality in standard test environment can be used to evaluate cellphone’s ability of resisting channel fading. The paper analyzes the uncertainty in measurement of cellphone speech quality in a reverberation chamber. Its assessment method is divided into class A and class B. There are four main factors for the in?uence of the uncertainty measurement:the repeatability of measurement results, the speech quality at the external antenna, the change of paddle position in reverberation chamber, and the accuracy of speech quality measurement device.