Noise gain expressions for low noise second-order digital filter structures
نویسندگان
چکیده
منابع مشابه
Noise gain formulas for low noise second-order digital filter structures
The quantization noise of a fixed-point digital filter is commonly expressed in terms of its noise gain, i.e. the factor by which the noise power q/12 of a single quantizer is amplified to the output of the filter. In this contribution, first a closedform expression for the optimal second-order noise gain in terms of the coefficients of the numerator and denominator polynomials of the transfer ...
متن کاملAdaptive Optimum Notch Filter for Periodic Noise Reduction in Digital Images
Periodic noises are unwished and spurious signals that create repetitive pattern on images and decreased the visual quality. Firstly, this paper investigates various methods for reducing the effects of the periodic noise in digital images. Then an adaptive optimum notch filter is proposed. In the proposed method, the regions of noise frequencies are determined by analyzing the spectral of noisy...
متن کاملA New Low Roundoff Noise Second Order Digital Filter Section Which Is Free of Constant-Input Limit Cycles
Some second-order digital filter sections which are free of zero-input and constant-input limit cycles have been proposed. In their synthesis, a free parameter is used to equalize the Lp norms of the transfer functions from the network input to the state variables, thus guaranteeing low output roundoff noise. In this paper, one of those structures is revisited: it is studied how the output roun...
متن کاملFIR filter structures having low sensitivity and roundoff noise
Absrraer—A class of structures for FIR fiiters is presented, which exhibits reduced coefficient sensitivity and superior roundoff noise properties as compared to the direct form realization. It is shown that using fixed-point arithmetic, these structures achieve the same accuracy and about the, same roundoff noise as those obtained in the floatingpoint implementation. The optimum structure to a...
متن کاملLow Noise Constant-input Limit Cycle-free Second Order Digital Filters
In this paper, a constant-input limit cycle-free second-order digital filter section that appeared in the literature in 1986 is revisited. It is studied how its relative output roundoff-noise variance depends on a free parameter used in the network synthesis. Details on the synthesis procedure and an output noise analysis for that structure are here addressed. A graphical study is presented, an...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Circuits and Systems II: Express Briefs
سال: 2005
ISSN: 1057-7130
DOI: 10.1109/tcsii.2004.842415