Abstract: Sparse linear arrays (SLAs) are becoming increasingly popular due to their superior performance in achieving higher degrees of freedom (DOFs) compared to uniform linear arrays. However, most ...
Abstract: A fully digital antenna array is developed and experimentally tested for beamforming, null generation, and in-band full duplex (IBFD) retrodirective beam-steering. The supporting S-band ...
This paper surveys econometric innovations related to differences-in-differences estimators and to event-study models with time-varying treatment effects. Our discussion highlights tricky ...
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