A Variable Step-size Frequency Mismatch Compensation Algorithm for Narrowband Active Noise Control
نویسندگان
چکیده
In this paper, A variable step-size filtered-X LMS (VSS-FXLMS) algorithm is first introduced to replace the filtered-X LMS (FXLMS) algorithm in the main controller of conventional narrowband ANC system, and extensive simulations reveal that this ANC system may also suffer from significant performance degradation in the presence of Frequency mismatch (FM), although it acts better in the key characteristics on steady-state performance, convergence speed, and tracking ability. Second, a compensation block updated by LMS algorithm is incorporated to mitigate the influence of the FM. Third, a variable step-size compensation algorithm is derived to improve the efficiency of tracking the FM. Numerous simulations for stationary and nonstationary scenarios are conducted to demonstrate the superior performance of the modified compensation algorithm.
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