Title :
Accuracy evaluation of fixed-point APA algorithm [adaptive filter applications]
Author :
Rocher, Romuald ; Menard, Daniel ; Sentieys, Olivier ; Scalart, Pascal
Author_Institution :
ENSSAT/IRISA, Univ. of Rennes I, Lannion, France
Abstract :
The implementation of adaptive filters with fixed-point arithmetic requires us to evaluate the computation quality. The accuracy can be determined by calculating the global quantization noise power in the system output. In this paper, a new model for evaluating analytically the global noise power in the APA (affine projection algorithm) is developed. The model is presented and applied to the NLMS-OCF. The accuracy of our model is analyzed by experimentation.
Keywords :
adaptive filters; circuit noise; fixed point arithmetic; least mean squares methods; LMS algorithm; NLMS-OCF; adaptive filters; fixed-point APA algorithm; fixed-point arithmetic; global quantization noise power; orthogonal correction factors algorithm; Adaptive filters; Algorithm design and analysis; Convergence; Fixed-point arithmetic; Least squares approximation; Mean square error methods; Power system modeling; Quantization; Resonance light scattering; Signal to noise ratio;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
Print_ISBN :
0-7803-8874-7
DOI :
10.1109/ICASSP.2005.1416239
