1. Objective and Introduction
2. The Wideband Semideterministic Prediction Model
3. Model Calibration
3.1. Extraction of Parameters for Calibration
3.2. Simulated Annealing Algorithm: Practical Implementation for Material Parameters Estimation
Notation | Meaning |
---|---|
A random solution as a set of material parameters | |
Objective function | |
Initial temperature of the stepped geometric decrease | |
Geometric decrease coefficient | |
Number of steps running with constant temperature | |
Maximum steps the algorithm runs without many changes |
4. Measurement Campaign and Calibration Results
4.1. Measurement Campaign
4.2. Calibration Performance
Position | Parameter | Measurement | Uncalibrated | Calibrated |
---|---|---|---|---|
Tx2-Rx1 |
[ns] | 10.3 | 2.8 | 8.1 |
[ns] | 170 | 60 | 160 | |
[dB] | 42.9 | 44.5 | 42.2 | |
Tx1-Rx2 |
[ns] | 16 | 5.5 | 13.8 |
[ns] | 170 | 70 | 120 | |
[dB] | 41.2 | 43.8 | 40.4 | |
Tx4-Rx1 |
[ns] | 11.8 | 1.3 | 7.9 |
[ns] | 160 | 40 | 170 | |
[dB] | 28.8 | 28.3 | 28.7 |
4.2.1. Overall Analysis
Parameter | Statistics | Uncalibrated | Calibrated |
---|---|---|---|
[ns] | 8 | 4 | |
5.1 | 4.7 | ||
1.5 | −5.6 | ||
22.8 | 18.1 | ||
[ns] | 46 | 11.9 | |
48.1 | 30.1 | ||
−30 | |||
140 | 80 | ||
[dB] | 1.6 | 1.3 | |
9.1 | 4 | ||
−23.5 | −10.5 | ||
21.1 | 7.3 |
4.2.2. Performance over Cost 231 Models
Model | OSM | MWM | Ray tracing |
---|---|---|---|
−5.3 | −4.1 | 1.3 | |
10.5 | 9.2 | 4 | |
26.8 | 17.8 | 7.3 | |
−14.8 | −17.4 | −10.5 |