通过信道估计技术实现对多输入多输出(MIMO)信道仿真器的功率延时分布的测量,完成MIMO信道仿真器相对路径衰减的校准,并利用两路径标准延时衰减微波器件网络,解决该参数的量值溯源问题.实验结果表明:相对路径衰减的校准可从0 dB到-25 dB,在500 MHz频率点和300 ns的相对路径延时点上,相对路径衰减校准结果的扩展不确定度为0.35 dB(k =2).%The channel power delay profile is measured using channel estimation techniques and therefore relative path attenuation of MIMO channel simulator is calibrated.The calibration system is traceable with the standard network which is made of delay line and attenuator.The experiment results show that the range of calibrating relative path attenuation is from 0 to-25 dB.At 500 MHz radio frequency and 300 ns relative path delay point,the expanded uncertainty of relative path attenuation is 0.35 dB(k =2).
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