Title :
Reconfigurable ADCs enable smart radios for 4G wireless connectivity
Author :
Rusu, Ana ; de Llera González, Delia Rodríguez ; Ismail, Mohammed
Author_Institution :
R. Inst. of Technol., Stockholm
Abstract :
A reconfigurable ADC based on a 2-2 modified cascaded SigmaDelta modulator designed for a GSM/WCDMA/WLAN/WiMAX zero-IF receiver has been presented. Employing the second-order feedforward SigmaDelta modulator in a 2-2 modified cascaded configuration, a high linearity over 100 kHz/2 MHz/10 MHz signal bandwidth is achieved. The P-DWA technique is applied in the first feedback 4-b DAC to eliminate the spurious tones associated with the multibit DAC nonlinearity in the WLAN/WiMAX modes
Keywords :
4G mobile communication; WiMax; cellular radio; radio receivers; sigma-delta modulation; wireless LAN; 10 MHz; 100 kHz; 2 MHz; 4G wireless connectivity; GSM; P-DWA technique; SigmaDelta modulator; WCDMA; WLAN; WiMAX; memory devices; pseudo-data-weighted-averaging technique; reconfigurable ADC; smart radios; zero-IF receiver; Bandwidth; Circuits; Communication standards; Digital filters; GSM; Multiaccess communication; Satellite broadcasting; WiMAX; Wireless LAN; Wireless communication;
Journal_Title :
Circuits and Devices Magazine, IEEE
DOI :
10.1109/MCD.2006.1657844
