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Online blind source separation method with adaptive step size in both time-invariant and time-varying cases
| Content Provider | Scilit |
|---|---|
| Author | Lu, Jiantao Cheng, Wei Zi, Yanyang |
| Copyright Year | 2019 |
| Description | Journal: Measurement Science and Technology To well balance the convergence speed and steady-state error of the online blind source separation, this paper develops an online blind source separation method with adaptive step size based on equivariant adaptive separation via independence (EASI) algorithm. First, we construct a separation indicator from the convergence condition of EASI that could reveal the separation degree of mixed signals. Then, a new forgetting factor suitable for non-stationary cases is designed to reduce the error accumulation of previous data, and the separation indicator can be adaptively updated. To automatically adjust the step size according to the separation degree, a nonlinear mapping between the separation indicator and the step size is constructed. Finally, numerical case studies and experimental case studies are provided to evaluate the performance of the proposed method which proves more effective in the results contrast. The results of numerical case studies show that the step size of the proposed method can be adaptively adjusted in the separation process and the proposed method could well balance convergence speed and steady-state error in both time-invariant and time-varying cases. The results of experimental case studies show that the proposed method has higher estimation accuracy. |
| Related Links | https://iopscience.iop.org/article/10.1088/1361-6501/ab5c75/pdf |
| ISSN | 09570233 |
| e-ISSN | 13616501 |
| DOI | 10.1088/1361-6501/ab5c75 |
| Journal | Measurement Science and Technology |
| Issue Number | 4 |
| Volume Number | 31 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2019-11-27 |
| Access Restriction | Open |
| Subject Keyword | Journal: Measurement Science and Technology Mechanical Engineering Step Size Convergence Speed Speed and Steady Steady State Error |
| Content Type | Text |
| Resource Type | Article |
| Subject | Applied Mathematics Instrumentation Engineering |
