Doppler resilient modulation in a CDMA-based acoustic local positioning system

2016 ◽  
Author(s):  
D. F. Albuquerque ◽  
J. M. N. Vieira ◽  
S. I. Lopes ◽  
T. Aguilera ◽  
F. J. Alvarez
Keyword(s):  
Positioning System ◽  
Local Positioning System

scholarly journals Measuring Gait Velocity and Stride Length with an Ultrawide Bandwidth Local Positioning System and an Inertial Measurement Unit

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 2896
Author(s):  
Pratham Singh ◽  
Michael Esposito ◽  
Zach Barrons ◽  
Christian A. Clermont ◽  
John Wannop ◽  
...  
Keyword(s):  
Gold Standard ◽  
Gait Speed ◽  
Inertial Measurement Unit ◽  
Stride Length ◽  
Measurement Unit ◽  
Gait Velocity ◽  
Positioning System ◽  
Inertial Measurement ◽  
Measurement Systems ◽  
Local Positioning System

One possible modality to profile gait speed and stride length includes using wearable technologies. Wearable technology using global positioning system (GPS) receivers may not be a feasible means to measure gait speed. An alternative may include a local positioning system (LPS). Considering that LPS wearables are not good at determining gait events such as heel strikes, applying sensor fusion with an inertial measurement unit (IMU) may be beneficial. Speed and stride length determined from an ultrawide bandwidth LPS equipped with an IMU were compared to video motion capture (i.e., the “gold standard”) as the criterion standard. Ninety participants performed trials at three self-selected walk, run and sprint speeds. After processing location, speed and acceleration data from the measurement systems, speed between the last five meters and stride length in the last stride of the trial were analyzed. Small biases and strong positive intraclass correlations (0.9–1.0) between the LPS and “the gold standard” were found. The significance of the study is that the LPS can be a valid method to determine speed and stride length. Variability of speed and stride length can be reduced when exploring data processing methods that can better extract speed and stride length measurements.

Field test results of an automated exposure assessment tool, the local positioning system (LPS)

2005 ◽  
Vol 7 (7) ◽  
pp. 736 ◽  
Author(s):  
L. A. Lee ◽  
S. C. Soderholm ◽  
M. M. Flemmer ◽  
J. L. Hornsby-Myers
Keyword(s):  
Exposure Assessment ◽  
Field Test ◽  
Assessment Tool ◽  
Positioning System ◽  
Test Results ◽  
Local Positioning System

Developing a Low-Cost, High Performance, SDR-Based Local Positioning System

2021 ◽  
Author(s):  
Fernando Palafox ◽  
Lyndsay Ruane ◽  
Scott Palo ◽  
Dennis Akos
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Positioning System ◽  
Local Positioning System
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