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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.
Date of Conference: 18-23 March 2005