A comparison of element and beam space spatial-spectrum estimation for multiple source clusters

Some of the relative advantages and disadvantages of performing eigenspace spatial-spectrum estimation in beam-space as opposed to element-space are considered. The issue of relative performance, specifically spectral-resolvability and peak position variance and bias, are addressed. It is concluded that when there are only sources impinging from a single sector (the sector selected for beam-space processing), there is no performance advantage in either element-space or beam-space processing. However, when there are out-of-sector sources beam-spacing processing has both advantages and disadvantages.<
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