Parameters Estimation of Interharmonic Based on State Space Model

Table 2

White Gaussian noise, 200 simulations, and interharmonics parameter estimation bias.

SNR/dB	𝑓1(0.20)	𝑓2(0.40)	𝑓3(0.80)	𝛼1(0.10)	𝛼2(0.20)	𝛼3(0.30)	𝜑1 (π/3)	𝜑2 (π/4)	𝜑3 (π/5)
8	−8.9𝑒2	6.6𝑒2	3.7𝑒3	−3.9𝑒2	2.9𝑒2	2.7𝑒2	9.7𝑒2	7.8𝑒2	−5.7𝑒2
10	−6.7𝑒2	−2.2𝑒2	−6.8𝑒3	2.1𝑒2	−1.3𝑒2	−1.3𝑒2	−6.3𝑒2	4.5𝑒2	−3.3𝑒2
15	4𝑒3	1.2𝑒3	4.7𝑒4	−6.2𝑒3	5.1𝑒3	4𝑒3	8.7𝑒3	−7.9𝑒3	5.6𝑒3
20	−2.1𝑒4	4.1𝑒5	2.8𝑒5	−7.1𝑒3	8.2𝑒3	−5.4𝑒4	−5.4𝑒3	−3.7𝑒3	3𝑒4
25	—	—	—	4.1𝑒3	−6.7𝑒3	−3𝑒4	−6.3𝑒3	4𝑒3	−6.9𝑒4