Efficient tracking of multiple sinusoids with slowly varying parameters

• An algorithm for tracking the parameters of slowly time-varying multiple sine waves in noise is proposed. The estimates of the instant frequencies are updated directly using a simple property of the one-step increment of the phases. The algorithm is based on the recursive least squares method with exponential weighting factor. The risetime and the noise rejection characteristics of the algorithm are studied theoretically in the single complex sine wave case, assuming that the SNR is sufficiently high. The proposed algorithm is easy to implement, and computer simulations show that it yields good results.<>

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

algorithm;exponential weighting factor;noise rejection characteristics;one-step increment;recursive least squares method;risetime;slowly time-varying multiple sine waves;tracking;adaptive filters;least squares approximations;parameter estimation;time-varying systems;tracking

Publication and Content Type

ref (subject category)

kon (subject category)