论文信息 - Flexible sigma delta ADC for mobile WiMAX applications

Flexible sigma delta ADC for mobile WiMAX applications

The IEEE 802.16e-2005 standard, also denoted as mobile WIMAX, was introduced as one of the first real efforts towards the deployment of fourth generation communication systems providing fixed and mobile broadband wireless access. In this paper, we present the studying and sizing of the homodyne receiver, especially the flexible sigma delta analog digital converter intended for use in the WiMAX band from 3.4GHz to 3.6GHz in 5MHz, 7MHz and 10MHz channel bandwidth. Our design technique consists to keep proper ADC architecture in response to multi-mode aspect of WiMAX standard. For this, we set each sampling frequency corresponding to each channel bandwidth so that we will keep the same OSR value for different channel bandwidth. For such specifications, a flexible fourth order continuous-time sigma-delta ADC, with mono-bit quantizer, is presented and its simulation results are shown by using Matlab Simulink.

M. Loulou | H. Mnif | J. Mallek

[1] Lirida A. B. Naviner,et al. Trade-off between antialiasing filter and analog-to-digital converters specifications in homodyne radio frequency receivers , 2001, IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211).

[2] Julien Goulier. Contribution à la conception de convertisseurs analogique numérique delta sigma à temps continu, des spécifications à l'implémentation. Application à un standard de télécommunication large bande. , 2008 .

[3] M. Ismail,et al. Adaptive sigma delta ADC for WiMAX fixed point wireless applications , 2005, 48th Midwest Symposium on Circuits and Systems, 2005..

[4] F. Kuttner,et al. A 3-mW 74-dB SNR 2-MHz continuous-time delta-sigma ADC with a tracking ADC quantizer in 0.13-/spl mu/m CMOS , 2005, IEEE Journal of Solid-State Circuits.

[5] Yijun Zhou,et al. A 5 GHz dual-mode WiMAX/WLAN direct-conversion receiver , 2006, 2006 IEEE International Symposium on Circuits and Systems.

[6] Khaled Grati. Architecture d'un recepteur radio multistandard a selection numerique des canaux , 2005 .

[7] Bahar Jalali Farahani. Adaptive digital calibration techniques for high speed, high resolution SIGMA DELTA ADCs for broadband wireless applications , 2005 .