Table 2 ARIMA model coefficients for the parameters of the PDPs collected on asphalt road for the transmit and receive antennas at 25 cm distance
From: ARIMA-based time variation model for beneath the chassis UWB channel
|  |  | ϕ 1 | ϕ 2 | ϕ 3 | ϕ 4 | ϕ 5 | σ a |
|---|---|---|---|---|---|---|---|
B 1 | 20k m/h | −0.8104 | −0.6506 | −0.4808 | −0.3280 | −0.1566 | 0.650994 |
|  | 40k m/h | −0.8381 | −0.6912 | −0.4898 | −0.3181 | −0.1630 | 0.636613 |
|  | 60k m/h | −0.8642 | −0.6856 | −0.5320 | −0.3255 | −0.1779 | 0.642207 |
B 2 | 20k m/h | −0.8436 | −0.7004 | −0.5297 | −0.3380 | −0.1837 | 0.899330 |
|  | 40k m/h | −0.8661 | −0.6628 | −0.5457 | −0.3553 | −0.1911 | 0.895680 |
|  | 60k m/h | −0.8048 | −0.6866 | −0.5021 | −0.3288 | −0.1591 | 0.911310 |
S 1 | 20k m/h | −0.8192 | −0.6428 | −0.4871 | −0.2890 | −0.1454 | 0.016715 |
|  | 40k m/h | −0.8605 | −0.6842 | −0.5309 | −0.3393 | −0.1492 | 0.014427 |
|  | 60k m/h | −0.8391 | −0.6696 | −0.4850 | −0.2903 | −0.1323 | 0.014853 |
S 2 | 20k m/h | −0.8078 | −0.6075 | −0.4413 | −0.3359 | −0.1624 | 0.017013 |
|  | 40k m/h | −0.8354 | −0.6547 | −0.4905 | −0.2903 | −0.2102 | 0.014947 |
|  | 60k m/h | −0.7861 | −0.6470 | −0.4743 | −0.3162 | −0.2086 | 0.016607 |
S 3 | 20k m/h | −0.8750 | −0.6981 | −0.5230 | −0.3539 | −0.1496 | 0.003219 |
|  | 40k m/h | −0.8655 | −0.7276 | −0.5553 | −0.3257 | −0.1873 | 0.003046 |
|  | 60k m/h | −0.8224 | −0.6789 | −0.5569 | −0.3797 | −0.1903 | 0.003065 |
X 1 | 20k m/h | −0.7905 | −0.6445 | −0.4843 | −0.3139 | −0.2069 | 0.205739 |
|  | 40k m/h | −0.8106 | −0.6493 | −0.4490 | −0.2330 | −0.1196 | 0.193656 |
|  | 60k m/h | −0.8518 | −0.7431 | −0.5953 | −0.3325 | −0.1785 | 0.187573 |
X 2 | 20k m/h | −0.8426 | −0.6957 | −0.4771 | −0.3073 | −0.1255 | 0.120691 |
|  | 40k m/h | −0.8578 | −0.6502 | −0.5158 | −0.3853 | −0.1886 | 0.112629 |
|  | 60k m/h | −0.8168 | −0.6746 | −0.4728 | −0.3047 | −0.1573 | 0.108991 |