Title :
Roundoff noise analysis of paraunitary filter banks realized in lattice structure
Author :
Zeng, Bing ; Gu, Liping
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong
Abstract :
Roundoff noise (fixed-point) characteristics of two-channel paraunitary filter banks realized in lattice structure are studied in detail. Under the assumption that all quantization errors are independent WSS white noise with zero-mean, we derive a closed-form formula to calculate the output roundoff noise variance, involving only the set of lattice parameters. Based on this results, several general and important conclusions can be drawn. In addition, we also present some simulation results to show that the analytical results are accurate enough for practical use
Keywords :
band-pass filters; digital arithmetic; filtering theory; lattice filters; quantisation (signal); roundoff errors; signal synthesis; white noise; analysis filters; analytical results; closed-form formula; fixed-point characteristics; independent WSS white noise; lattice parameters; lattice structure; output roundoff noise variance; quantization errors; roundoff noise analysis; simulation results; synthesis filters; two-channel paraunitary filter banks; zero-mean; Analytical models; Channel bank filters; Filter bank; Fixed-point arithmetic; Inspection; Lattices; Noise robustness; Signal synthesis; Water; White noise;
Conference_Titel :
Digital Signal Processing Workshop Proceedings, 1996., IEEE
Conference_Location :
Loen
Print_ISBN :
0-7803-3629-1
DOI :
10.1109/DSPWS.1996.555468
