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    • 5. 发明申请
    • Systems and methods for receiving multiple input, multiple output signals for test and analysis of multiple-input, multiple-output systems
    • 用于接收多输入多输出信号的系统和方法,用于多输入多输出系统的测试和分析
    • US20080084951A1
    • 2008-04-10
    • US11544421
    • 2006-10-06
    • Helen ChenBrian J. AvenellGordon R. StrachanMichael C. Lawton
    • Helen ChenBrian J. AvenellGordon R. StrachanMichael C. Lawton
    • H04B7/10
    • H04B7/04H04B17/0087H04L1/06
    • Systems and methods for receiving MIMO signals for testing and analyzing operation of MIMO communications devices. Examples of systems and/or methods for receiving MIMO signals include a measuring receiver with N RF paths consisting of N downconverters. Each downconverter achieves a frequency shift of the input MIMO signal equal to a shifting frequency of a first intermediate frequency (IF) plus a delta determined by the signal bandwidth multiplied by an integer number between 1 and N. The shifted N MIMO signals are combined to generate one combined analog MIMO signal. An analog to digital converter converts the combined analog MIMO signal to a stream of digital samples where the samples may be tested and analyzed with metrics on signals communicated in a MIMO environment. Example systems and method for receiving MIMO signals may also be implemented as a MIMO channel emulator such that samples generated by the ADC may be upconverted to output copies of the original signals to a receiver DUT, for example.
    • 用于接收MIMO信号以测试和分析MIMO通信设备的操作的系统和方法。 用于接收MIMO信号的系统和/或方法的示例包括具有由N个下变频器组成的N个RF路径的测量接收机。 每个下变频器实现输入MIMO信号的频移等于第一中间频率(IF)的移位频率加上由信号带宽乘以1与N之间的整数确定的增量。移位的N个MIMO信号被组合到 生成一个组合的模拟MIMO信号。 模数转换器将组合的模拟MIMO信号转换成数字样本流,其中样本可以通过在MIMO环境中传送的信号的度量进行测试和分析。 用于接收MIMO信号的示例系统和方法也可以被实现为MIMO信道仿真器,使得例如由ADC生成的采样可以被上变频以将原始信号的副本输出到接收机DUT。