A block diagram of the randomized PSK signal generator.
Representative random BPSK and random QPSK signals with time segment of 10 signal cycles. The phase angles are relative to the carrier signal.
An experimental setup for the acoustic field scan.
Normalized square of the acoustic field pressure along the transmitting transducer axis of symmetry with sinusoidal excitation (no PSK) and excitations with random and sequential BPSK and QPSK.
Normalized square of the acoustic field pressure on the plane : (a) sinusoidal CW (no PSK), (b) sequential BPSK, (c) random BPSK, (d) sequential QPSK, and (e) random QPSK.
Standing wave effect with different excitations quantified in terms of the value which is defined as the comparison of the peak, , over a region with the average amplitude of as described in Eq. (1).
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