Title :
Roundoff and coefficient quantization noise of pipelined scattered look-ahead filters with decomposition
Author :
Chang, Kyung-Hi ; Bliss, William G.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
Unified statistical coefficient quantization (SCQ) and round-off noise (RON) analysis for a fixed-point arithmetic model is applied to scattered look-ahead (SLA) with power-of-two decomposition filters. Assumptions under which noise power due to SCQ is the same as RON under single length accumulation are derived. Analytical results are derived for first-and second-order direct-form (DF) and minimum roundoff noise (MRON) basis filters which contradict previous claims. The application of SLA is shown to slightly increase noise for poles near z=0 and to generally decrease noise near |z|=1, except that the noise of DF SLA increases greatly for small regions near |z|=1 due to closely spaced poles
Keywords :
analogue-digital conversion; digital arithmetic; digital filters; noise; roundoff errors; coefficient quantization noise; first order direct form filter; fixed-point arithmetic model; noise power; pipelined scattered look-ahead filters; poles; power-of-two decomposition filters; round-off noise; second order direct form filter; statistical coefficient quantization; Covariance matrix; Delay; Digital filters; Equations; Fixed-point arithmetic; Integrated circuit noise; Quantization; Scattering; Sparse matrices; Sufficient conditions;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-0532-9
DOI :
10.1109/ICASSP.1992.226343
