8) Develop a simulated digital predistortion model employing the calibration dat
ID: 672400 • Letter: 8
Question
8) Develop a simulated digital predistortion model employing the calibration dataset.
Using Eq. 3 and 10, design a digital predistortion model capable of accurately compensating for the non-linearities across input voltages and frequencies present in the amplifier. State the values of KPD
and MPD chosen.
State the dimensions of the resulting delay matrix for the DPD model.
State the scaling value used on the calibration data during creation of the DPD coefficient vector.
K-1 M-1 hkmx(n - m)|x(n - m)Explanation / Answer
y(n) = Sum K ranging from 0 to K-1 ( Sum m ranging from 0 to M-1 ( h km x (n-m) | x (n-m) | k
plugging in values,
n=1,h=2, k=3,m=4,x=5
y(1) = sum(sum(2 * 3 * 4 * 5 * 3 | 15 ^ 3 |))
= 24 * 5 *3 | 3375 |
= 360 | 3375 |
= 1215000
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