摘要
本研究对医学超声成像中可能应用的二进制最优编码序列进行了深入研究。提出了应用于医学超声的二进制最优及近似最优编码序列及其判断标准。通过穷举搜索给出了长度在15—33位的最优及近似最优编码序列，并选取长度为25的近似最优序列进行实验研究，与长度为13位的Barker码进行对比实验，证实了本研究所提出的二进制最优编码序列的设计方法是有效的。与Barker码相比，使用增加长度的最优序列进行编码激励可以获得更高的信噪比增益，同时保持与Barker码相近的距离旁瓣水平。
The optimal binary sequences used in medical ultrasound imaging were studied in this paper. The concept and the criteria of optimal binary sequences used in medical ultrasound imaging were proposed. Optimal sequences of length 15-33 were obtained through exhaustive search. An optimal sequence of length 25 was chosen to take comparative experiments with Barker code of length 13, and the effectiveness of optimal sequences was proved. Compared with Barker codes, the longer optimal binary sequences provided higher SNR gain, while similar range sidelobe level was remained.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2007年第1期42-47,共6页
Chinese Journal of Biomedical Engineering
关键词
编码激励
二进制编码序列
医学超声
coded excitation
binary code sequence
medical ultrasound
作者简介
通讯作者。E-mail：gsk-dea@tsinghua.edu.cn
