本文關(guān)鍵詞： 線(xiàn)性調(diào)頻信號(hào) 帶寬 掃描時(shí)間 窗函數(shù) 峰值旁瓣水平　出處：《壓電與聲光》2016年01期 　論文類(lèi)型：期刊論文

【摘要】：在超聲成像中,峰值旁瓣過(guò)高形成偽像,影響超聲成像質(zhì)量。針對(duì)超聲換能器的特性,研究線(xiàn)性調(diào)頻信號(hào)激勵(lì)超聲換能器后的帶寬、掃描時(shí)間與脈沖壓縮峰值旁瓣水平相關(guān)性,設(shè)計(jì)相應(yīng)的調(diào)制/濾波方案抑制超聲成像峰值旁瓣水平。理論分析和實(shí)驗(yàn)結(jié)果表明,線(xiàn)性調(diào)頻信號(hào)激勵(lì)換能器脈沖壓縮后的峰值旁瓣水平分別隨著線(xiàn)性調(diào)頻信號(hào)帶寬和掃描時(shí)間的增加而降低,通過(guò)比對(duì)分析理論與實(shí)驗(yàn)的差值,得到誤差函數(shù)erf(B)、erf(T);與tukey窗函數(shù)和Dolph-Chebyshev窗函數(shù)調(diào)制/濾波方案相比,kaiser窗函數(shù)調(diào)制/濾波方案更好地解決了脈沖壓縮分辨率和峰值旁瓣水平的折衷問(wèn)題,為最佳調(diào)制/濾波方案。
[Abstract]:In ultrasonic imaging, the peak sidelobe is too high to form a false image, which affects the ultrasonic imaging quality. According to the characteristics of ultrasonic transducer, the correlation between the bandwidth, scanning time and pulse compression peak sidelobe level of the ultrasonic transducer excited by LFM signal is studied. The corresponding modulation / filtering scheme is designed to suppress the peak sidelobe level of ultrasonic imaging. The theoretical analysis and experimental results show that, The peak sidelobe level decreases with the increase of LFM signal bandwidth and scanning time after pulse compression, and the difference between theory and experiment is compared. Compared with the tukey window function and the Dolph-Chebyshev window function modulation / filtering scheme, the proposed scheme solves the tradeoff problem between the pulse compression resolution and the peak sidelobe level, and is the best modulation / filtering scheme.
【作者單位】： 陜西師范大學(xué)物理學(xué)與信息技術(shù)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(10974128;11274217)
【分類(lèi)號(hào)】：TB559

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 陳鵬;侯朝煥;馬曉川;梁亦慧;;基于DFRFT水下動(dòng)目標(biāo)LFM回波檢測(cè)算法[J];電聲技術(shù);2006年06期

相關(guān)碩士學(xué)位論文 前1條

1 劉雯雯;水下運(yùn)動(dòng)目標(biāo)的多參數(shù)聯(lián)合探測(cè)系統(tǒng)研究[D];華南理工大學(xué);2015年

，

本文編號(hào)：1504025