A modified Goertzel structure for efficient real-time blood velocity profile estimation

Abstract

ABS TRAC TMany applications utilize short-gate pulse-Doppler schemes to extract velocity information, such as a blood vessel's velocity profile. Advances in signal processing hard ware permit software gating to replace traditional hardware gating. Although software gating can be advantageous, the added computational complexity hinders real-time opera tion, which is clinically desirable. Thus, high-resolution, real-time operation requires efficient algorithms for data processing.This paper develops a modified Goertzel structure for efficient real-time blood velocity profile estimation. When compared with traditional computational methods, this modified structure offers significant advantages with regard to memory, number of operations, and latency of estima tion. Simulations are provided to demonstrate algorithm effectiveness.

A digital tone decoder based on a modified Goertzel algorithm

“…This algorithm models each frequency with a two-pole autoregressive model and strengthen Fourier transform (FFT) [1,2] computation. With comprehensive consideration, we choose Goertzel algorithm [4] which is faster than FFT and effective to extract the signal spectrum from the input signal to implement the tone decode function. In addition, the point by point recursive structure of Goertzel algorithm allows the parallel processing of signal acquisition and computing.…”