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January 3, 2010 Advanced Technoligies: Matched filtering

2023-03-03
623
Sonostar Technologies Co., Limited

January 3, 2010    

Matched filtering

Matched filtering is an important signal processing function. The 
transducer sends out unique transmit sequences, each of which can be 
recognized by a matched filter. The key advantage is that the transmit 
sequence can be expanded in time at a lower amplitude and transmitted 
at a lower peak pressure amplitude level. This can reduce bioeffects 
and contrast agent effects. It can also preserve axial resolution with 
depth, and increased sensitivity and tissue penetration depth. 

A variety of Matched filtering have been implemented. There are two 
classical types of transmit waveforms, a coded binary sequence and a 
chirped pulse, which are borrowed from radar. 


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