• Publications
  • Influence
Model-based estimation of ultrasonic echoes. Part I: Analysis and algorithms
  • R. Demirli, J. Saniie
  • Physics, Medicine
  • IEEE Transactions on Ultrasonics, Ferroelectrics…
  • 1 May 2001
The patterns of ultrasonic backscattered echoes represent valuable information pertaining to the geometric shape, size, and orientation of the reflectors as well as the microstructure of theExpand
  • 229
  • 18
FPGA implementation of fast QR decomposition based on givens rotation
In this paper, an improved fixed-point hardware design of QR decomposition, specifically optimized for Xilinx FPGAs is introduced. A Givens Rotation algorithm is implemented by using a foldedExpand
  • 34
  • 5
Flaw-to-grain echo enhancement by split-spectrum processing
Abstract A split-spectrum processing technique for an ultrasonic flaw detection system has been developed which improves the flaw-to-grain echo ratio in large-grained materials. The enhancement isExpand
  • 204
  • 4
  • PDF
Model-based estimation of ultrasonic echoes. Part II: Nondestructive evaluation applications
  • R. Demirli, J. Saniie
  • Medicine, Physics
  • IEEE Transactions on Ultrasonics, Ferroelectrics…
  • 1 May 2001
For Part I see ibid., vol.48, no.3, pp.787-802 (2001). Accurate estimation of the ultrasonic echo pattern leading to the physical property of the object is desirable for ultrasonic NDEExpand
  • 113
  • 4
Analysis of low-order autoregressive models for ultrasonic grain signal characterization
When testing materials nondestructively with ultrasound, the grain scattering signal provides information that may be correlated to regional microstructure variation. Second and third-orderExpand
  • 56
  • 3
A successive parameter estimation algorithm for chirplet signal decomposition
In ultrasonic imaging systems, the patterns of detected echoes correspond to the shape, size, and orientation of the reflectors and the physical properties of the propagation path. However, theseExpand
  • 100
  • 3
Analysis of homomorphic processing for ultrasonic grain signal characterization
A model for the grain signal is presented, which includes the effect of frequency-dependent scattering and attenuation. This model predicts that the expected frequency increases with scattering andExpand
  • 78
  • 3
Convergence properties of general network selection games
We study the convergence properties of distributed network selection in HetNets with priority-based service. Clients in such networks have different priority weights (e.g., QoS requirements,Expand
  • 23
  • 3
  • PDF
Fast memory addressing scheme for radix-4 FFT implementation
In this study, an efficient addressing scheme for radix-4 FFT processor is presented. The proposed method uses extra registers to buffer and reorder the data inputs of the butterfly unit. It avoidsExpand
  • 24
  • 3
Analysis of order statistic filters applied to ultrasonic flaw detection using split-spectrum processing
Split-spectrum processing of broadband ultrasonic signals coupled with order statistic filtering has proven to be effective in improving the flaw-to-clutter ratio of backscattered signals. It isExpand
  • 56
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