In this research, we use chirp excitation, which is one of coded waveforms as an attempt to improve CTR by increasing pulse length and maintain the axial resolution by received pulse compression.
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- 本研究將進(jìn)一步應用編碼波形中的高斯啾聲脈沖在脈沖反相基頻影像上，以拉長(cháng)脈沖的方式取代提升脈沖峰值來(lái)增加脈沖能量，可提升影像之訊雜比且避免破壞氣泡與組織，然后利用壓縮濾波器壓縮回波訊號，恢復因脈沖拉長(cháng)而下降之軸向解析度。
