Title :
Accuracy evaluation of fixed-point LMS algorithm
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 the computation quality to be evaluated. The accuracy may be determined by calculating the global quantization noise power in the system output. A new model for evaluating analytically the global noise power in the LMS algorithm and in the NLMS algorithm is developed. Two existing models are presented, then the model is detailed and compared with the ones before. The accuracy of our model is analyzed by simulation.
Keywords :
adaptive filters; algorithm theory; fixed point arithmetic; least mean squares methods; program verification; quantisation (signal); random noise; LMS algorithm; NLMS algorithm; accuracy evaluation; adaptive filters; fixed-point arithmetic; global quantization noise power; Adaptive filters; Algorithm design and analysis; Embedded system; Fixed-point arithmetic; Least squares approximation; Mean square error methods; Power system modeling; Quantization; Resonance light scattering; Vectors;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1327091
