Performance evaluation of Digital Beamforming Method Using Sampled - Delay Focusing(SDF)

Sampled Delay Focusing(SDF)을 이용한 디지털 빙포밍 방법에 대한 성능 평가

In a conventional digital beamformer received signal were sampled at least Nyquist rate of its maximum frequency. But it is wide band signal and its coherent sum must be obtained, the sampling clock of about $8f_o$ and $16f_o$ is necessary or high quality images. This paper described how image qualities are varied according to sampling clock. Mainly, we compared the SDF(Sampled Delay Focusing) that had maximum precision of $8f_o$ with $16f_o$ sampling system and analyze its characteristics.