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ENGL
2008

GA-based Optimization of Sigma-delta Modulators for Wireless Transceivers

8 years 10 months ago
GA-based Optimization of Sigma-delta Modulators for Wireless Transceivers
Abstract--Over-sampling sigma-delta analog-todigital converters (ADCs) are one of the key building blocks of state of the art wireless transceivers. In sigma-delta modulator design, the scaling coefficients determine the peak signal-to-noise ratio. Therefore, selecting the optimum value of the coefficient is very important. To this end, this paper addresses the design of a fourth-order multi-bit sigma-delta modulator suitable for Wireless Local Area Networks (WLAN) receivers with feed forward path and the optimum coefficients were selected using genetic algorithm (GA)based search method. In particular, the proposed converter makes use of low-distortion swing suppression SDM architecture which is highly suitable for low oversampling ratios to attain high linearity over a wide bandwidth. A second-order traditional topology has been chosen as the second design example to validate our proposed method. The aim of this paper is the identification of the best coefficients suitable for the pro...
Babita R. Jose, P. Mythili, Jimson Mathew
Added 10 Dec 2010
Updated 10 Dec 2010
Type Journal
Year 2008
Where ENGL
Authors Babita R. Jose, P. Mythili, Jimson Mathew
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