MIMO信道相对路径延时校准技术的研究

应用模块化仪器平台组建多输入多输出(MIMO)信道路径参数校准装置,利用信道估计技术测量MIMO信道的频率响应,依据傅氏变换理论设计数据处理程序,并计算出相对路径延时,实现对MIMO信道模拟器中该参数的校准。使用延迟线制作两路径标准延时网络,解决量值溯源问题。经过实验验证,校准系统的相对路径延时测量范围最长可达到5000 ns,在500 MHz的频率点上,从291 ns到585 ns相对路径延时测量最大示值误差不超过56 ns的延时分辨力。

Study on the Calibration Techniques for Relative Path Delay of MIMO Channel

The calibration equipment of MIMO channel path parameter is made up of modular instruments,and using channel estimation techniques,the frequency response of MIMO channel is measured.Then the program that calculate the relative path delay is designed in order that the quantity of path parameter of MIMO channel simulator is calibrated.The calibration system is traceable by using the standard network which is made of delay line.According to experiment results,the range of measuring relative path delay is up to 5 000 ns.At 500 MHz frequency point,indicating value error of relative path delay is not more than 56 ns delay resolution from 291 ns to 585 ns.