Underwater network cardinality estimation using cross-correlation: Effect of unequal sensor spacing

2016 ◽  
Author(s):  
B. K. Dash ◽  
S. A. H. Chowdhury ◽  
A. H. M. M. Kamal ◽  
M. S. Anower ◽  
A. Halder
Keyword(s):  
Cross Correlation ◽  
Correlation Effect ◽  
Cardinality Estimation

NORMALIZED INTENSITY VARIANCE OF A SINGLE-MODE LASER DRIVEN BY QUADRATIC PUMP NOISE

2006 ◽  
Vol 20 (32) ◽  
pp. 5383-5390 ◽  
Author(s):  
LI CAO ◽  
DA-JIN WU
Keyword(s):  
Cross Correlation ◽  
Laser Intensity ◽  
Planck Equation ◽  
Single Mode ◽  
Correlation Effect ◽  
Noise Model ◽  
Mode Laser ◽  
Laser Noise ◽  
Model Driven ◽  
Single Mode Laser

A single-mode laser noise model driven by quadratic pump noise is proposed. The approximation Fokker–Planck equation (AFPE) and steady probability distribution of the laser intensity for the model are derived. It is found that the AFPE is symmetrical with respect to the sign of λ. This point leads to some symmetrical features for the statistical properties of the system. As an important application of the above-mentioned results, the normalized intensity variance NIV is derived. It is found that the NIV is controlled intensively by the cross-correlation between the real and imaginary parts of pump noise. For the NIV versus a curves an interest cross-correlation effect, the two directions of the NIV versus a curves, is found.

Optimized Pseudorandom BASK Emission Sequences for Ultrasonic Multi-Life Location System

2011 ◽  
Vol 268-270 ◽  
pp. 1850-1855
Author(s):  
Zhen Jing Yao ◽  
Tao Gao ◽  
Hong Rui Ma ◽  
Chun Sheng Guo
Keyword(s):  
Spread Spectrum ◽  
Cross Correlation ◽  
Correlation Effect ◽  
Correlation Technique ◽  
Echo Signal ◽  
Ultrasonic Sensors ◽  
Location System ◽  
Shift Keying ◽  
M Sequences ◽  
Signal Correlation

This paper addresses the performance of pseudorandom Binary Amplitude Shift Keying (BASK) emission sequences for an ultrasonic multi-life location system in rescue robot. To improve the performance of multi-life location system, the BASK modulation were used to construct the spread spectrum emission sequences for ultrasonic sensors. Correlation technique in the receiving circuit was used to de-spread. Good correlation characteristics, i.e., sharp autocorrelation and flat cross-correlation, can help eliminate crosstalk between multichannel ultrasonic sensors. To improve the echo signal correlation effect, genetic algorithm was applied to optimize pseudorandom m sequences. In simulated post-earthquake environment, experimental verification of ultrasonic multi-life location system consisting of eight-channel SensComp 600 series electrostatic sensors with optimized BASK emission sequences was carried out. The experimental results demonstrate that the ultrasonic multi-life location system with the proposed method can realize multi-life location simultaneously.

scholarly journals Cross-correlation effect of ARAIM test statistic on false alarm risk

GPS Solutions ◽  
2020 ◽  
Vol 24 (4) ◽  
Author(s):  
Eugene Bang ◽  
Carl Milner ◽  
Christophe Macabiau
Keyword(s):  
False Alarm ◽  
Cross Correlation ◽  
Correlation Effect ◽  
Test Statistic
Sign in / Sign up

Export Citation Format

Share Document