Research Article

Subspace Identification of Hammerstein Model with Unified Discontinuous Nonlinearity

Table 2

Parameters estimation for the Hammerstein model with SNR = 10 and 8 dB.

SNR Parameters for the nonlinear modelDenominatorNumeratorMSE
pab

Without noiseTrue2.00000.50000.00001.5000−1.00000.00000.0000−0.20000.35001.00000.50000.0004
2.00000.50010.00001.5001−1.00000.00060.0007−0.20010.35001.00130.4998
0.00010.00030.00010.00050.00000.00040.00070.00010.00000.00020.0002

10 dBTrue2.00000.50000.00001.5000−1.00000.00000.0000−0.20000.35001.00000.50000.0437
2.00270.47600.03261.4874−1.05460.0538−0.0368−0.20060.34961.00290.4898
0.07090.06180.02080.02640.0188−0.05730.01890.00170.00100.00910.0073

8 dBTrue2.00000.50000.00001.5000−1.00000.00000.0000−0.20000.35001.00000.50000.1596
2.07410.53410.10181.4210−0.8515−0.0715−0.0290−0.19800.34881.03850.4887
0.03880.01060.02870.09410.09630.10680.03270.00160.00220.02470.0783