Table I.
Residual signal entropy of ARX and IIR filters (narrower- and wider-bands) as a function of SNR.
The results obtained by the ARX model are significantly smaller than those of IIR filters (p< 2.08× 10−6, p< 1.28× 10−5 for narrower-band and wider-band IIR filters, respectively), which indicates the performance of ARX model is better than the predetermined IIR filters in this simulated case.
| SNR (dB) | ARX | Narrower-band IIR | Wider-band IIR |
|---|---|---|---|
| −20 | 0 | 3.9037 | 3.4040 |
| −40 | 0 | 3.2102 | 3.0692 |
| −46 | 0 | 3.3879 | 3.1261 |
| −60 | 0.5032 | 3.1766 | 2.6725 |
| −66 | 0.9896 | 4.0606 | 4.1467 |