A Modified LFM Signal in Coded Ultrasound

Author

Jin Cheng ; Chen Si-ping

Author_Institution

Coll. of Biomed. Eng. & Instrum. Sci., Zhejiang Univ., Hangzhou

fYear

2008

fDate

18-18 Dec. 2008

Firstpage

389

Lastpage

391

Abstract

The linear nature of linear frequency modulation (LFM) waveform makes it rather insensitive to frequency shifts, a property which is of great importance in ultrasound imaging. However, relatively high sidelobes remain in the autocorrelation function (ACF). A modified FLM waveform is proposed by combining LFM with binary frequency code. This waveform maintains the linear nature of LFM and at same time low sidelobos are exhibited. Simulated results show the relation between the sidelobes reduction with the amplitude of the binary frequency code.

Keywords

biomedical ultrasonics; correlation methods; frequency modulation; image coding; medical image processing; FLM waveform; LFM signal; autocorrelation function; binary frequency code; biomedical ultrasonics; linear frequency modulation; sidelobe reduction; ultrasound image coding; Autocorrelation; Bandwidth; Biomedical engineering; Biomedical imaging; Chirp modulation; Educational institutions; Frequency; Radar imaging; Shape control; Ultrasonic imaging; Ambiguity function; Coded ultrasound; LFM; Sidelobes;

fLanguage

English

Publisher

ieee

Conference_Titel

Future BioMedical Information Engineering, 2008. FBIE '08. International Seminar on

Conference_Location

Wuhan, Hubei

Print_ISBN

978-0-7695-3561-6

Type

conf

DOI

10.1109/FBIE.2008.86

Filename

5076764