研究目的
To characterize transmitters by multiple input multiple output (MIMO) Volterra series and study the HW effects in a RF MIMO transmitter composed by input and output coupling filters (cross-talk) sandwiching a non-linear amplification stage.
研究成果
The technique was used to determine the dominant structure in a MIMO transmitter and can be exploited designing efficient behavioral models and digital compensation techniques.
研究不足
The technique requires input signals of different periodicity and may be affected by measurement noise, especially in the estimation of the cross-kernel.
1：Experimental Design and Method Selection:
The methodology involves decomposing the MIMO Volterra series into self-kernels and cross-kernels using input signals of different periodicity.
2：Sample Selection and Data Sources:
Two independently generated noise-like signals using distinct prime numbers T1 = 2399 and T2 = 2411 samples were used.
3：List of Experimental Equipment and Materials:
Two SMBV100A vector signal generators (VSG) from Rohde & Schwarz and 2 acquisition paths sampled with an ADC ADQ214 from SP devices.
4：Experimental Procedures and Operational Workflow:
The measurement collects T = T1 × T2 samples. The technique uses input signals of different periodicity to decouple its effects at the output using sample averages.
5：Data Analysis Methods:
The separated kernels can be used for studying the properties of the MIMO transmitters giving valuable feed-back about its HW imperfections and to develop behavioral models and compensation techniques.
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