Searching Binary Sequences for Coded Excitation in Medical Ultrasound

In this paper, the optimal binary sequences for coded excitation in B-mode medical ultrasound imaging are found by exhaustive search. The criterion is the mainlobe to sidelobe ratio (MSR) of the pulse compression. The pulse compression filter is designed based on an FIR least squares inverse filtering algorithm. The optimal binary sequences of length 13 to 28 are shown. A simulation of coded excitation using the resulting sequence is performed. The presented search results showed regularity in the structure of sequences with high MSR, which may be of help in the search of longer sequences