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Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System
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A High-Multi Target Resolution Focal Plane Array-Based Laser Detection and Ranging Sensor.

Hyeon-June Kim1, Eun-Gyu Lee2, Choul-Young Kim3

  • 1CIS Development Division, SK Hynix, Icheon 17336, Korea. hyeonjunekkim@gmail.com.

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Summary
This summary is machine-generated.

This study presents a new digital-assisted scheme for focal plane array (FPA)-based laser detection and ranging (LADAR) receivers. The method significantly improves multi-target resolution (MTR) using a digital signal processor (DSP) and analog memory.

Keywords:
FPA-based LADARToFmulti-target resolutionmultiple echo detection

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Area of Science:

  • Optoelectronics
  • Integrated Circuit Design
  • Photonics

Background:

  • Focal Plane Array (FPA)-based Laser Detection and Ranging (LADAR) systems face limitations in multi-target resolution (MTR).
  • Conventional LADAR receivers often have underutilized readout periods.
  • Enhancing MTR is crucial for advanced sensing applications.

Purpose of the Study:

  • To introduce a novel digital-assisted multiple echo detection scheme for FPA-based LADAR receivers.
  • To improve the MTR of LADAR systems without compromising power or area.
  • To leverage existing hardware components for enhanced performance.

Main Methods:

  • Utilizing the waste time in the serial data readout period of FPA-based LADAR receivers.
  • Integrating an external digital signal processor (DSP) and additional analog memory.
  • Developing a prototype chip in a 0.18-μm CMOS process with an 8x8 FPA configuration.

Main Results:

  • Achieved a three-times enhancement in MTR compared to conventional FPA-based LADAR.
  • Demonstrated a single receiver with an MTR of 20 ns.
  • Reported low power consumption (7.47 mW) and small pixel area (100 μm × 100 μm).
  • Characterized performance metrics including input-referred noise current (4.48 pA/√Hz), bandwidth (530 MHz), MDS (340 nA), walk error (2.2 ns), and non-linearity (0.05%).

Conclusions:

  • The digital-assisted multiple echo detection scheme effectively enhances MTR in FPA-based LADAR.
  • The proposed method offers a low-power, compact solution for improved multi-target detection.
  • This technique has significant implications for advanced LADAR applications requiring high resolution.