After obtaining the virtual array signal model in (12), all the impinging DOAs can be estimated by using the spatial smoothing MUSIC algorithm or the compressive sensing (CS) algorithm, which have been discussed in [10 14].
The spatial smoothing could be done by averaging spatial sub-bands.
To decorrelate coherent signals, the spatial smoothing (SS) [8] or forward-backward spatial smoothing (FBSS) [9] are especially noteworthy.
This study analyzed the spatial distribution of HFRS in Liaoning Province, China, during 2000 to 2005 using the spatial smoothing and spatial scan statistic method.
We treated the spatial smooth as a bivariate smoothing function over both spatial dimensions and used loess, or locally weighted scatterplot smoothing, as the type of smoother [ 35, 36].
The SNR increase might be explained by the additional spatial smoothing that is applied when interpolating volumes to generate registered volumes.
Note that these variations are also influenced by the spatial Gaussian smoothing which is applied every frame.
Once the bidirectional motion field is obtained, it can be observed that the MVs sometimes have low spatial coherence, so the MVs are improved by a spatial smoothing algorithm targeting the reduction in the number of false MVs.
To avoid this result may be influenced by the presence of spatial smoothing we repeated the analysis without using any spatial smoothing.
