Using Golay complementary sequences for multi-mode ultrasonic operation

In many of the recent array ultrasonic applications, acquisition rate is a crucial issue. Many of those applications are even impractical due to the sequential nature of ultrasound systems scanning. Obviously, one way of increasing this rate is the use of multi-mode operation. This paper introduces the basic aspects of multi-mode ultrasonic operation based on pulse compression techniques by means of binary sequences in a BPSK modulation scheme, and the advantages of Golay sequences, in multi-mode operation with respect to m-sequences, mostly used in recent works. Finally, some results of simulations using four modes simultaneously and a hardware architecture for testing these results are shown