Distance Measurement Error in Time-of-Flight Sensors Due to Shot Noise

Sensors

Julio Illade-Quinteiro²  Vໜtor M. Brea²  Paula López²  Diego Cabello²  Gines Doménech-Asensi¹ 

[1] Department of Electronics, Computer Technologies and Projects, Universidad Politécnica de Cartagena, 30202-Cartagena, Spain; E-Mail:;Centro de Investigación en Tecnoloxías da Información (CITIUS), University of Santiago de Compostela, 15782-Santiago de Compostela, Spain; E-Mails:

关键词: time-of-flight sensors;    shot noise;    standard CMOS technologies;    distance measurement;   

DOI  :  10.3390/s150304624

来源: mdpi

【 摘 要 】

Unlike other noise sources, which can be reduced or eliminated by different signal processing techniques, shot noise is an ever-present noise component in any imaging system. In this paper, we present an in-depth study of the impact of shot noise on time-of-flight sensors in terms of the error introduced in the distance estimation. The paper addresses the effect of parameters, such as the size of the photosensor, the background and signal power or the integration time, and the resulting design trade-offs. The study is demonstrated with different numerical examples, which show that, in general, the phase shift determination technique with two background measurements approach is the most suitable for pixel arrays of large resolution.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.