Improved M-Government Based on Mobile WiMAX

Marin, Iuliana; Al-Habeeb, Naseer Abdulkarim Jaber; Goga, Nicolae; Vasilățeanu, Andrei; Drăgoi, George; Boiangiu, Costin-Anton

doi:10.1109/cscs.2017.12

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…16 family of standards that provision wireless broadband access. With the IEEE 802.16e−2005 mobility amendment, WiMAX promises to address the ever-increasing demand for mobile high-speed wireless data in fourth-generation (4G) networks [1], [2]. In addition, mobile broadband wireless networks, such as mobile WiMAX, have been designed to support several features, incliding quality of service or enhanced data protection mechanisms, in order to provide true access to real-time multimedia applications [3].…”

Section: Introductionmentioning

confidence: 99%

A 0.58 mm2 CMOS reconfigurable sigma delta ADC for mobile WiMAX receiver

Mallek

Daoud

Aloulou

et al. 2019

IyU

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Objective: In this work the design of a fourth-order Reconfigurable Sigma Delta analog-to-digital converter (ΣΔ ADC) for 5MHz, 7MHz or 10MHz channel bandwidths are presented. Materials and methods: Our design technique aims to keep the same ADC architecture in response to multi-band and multi-mode aspects of Mobile WiMAX standard. To this end, we set each sampling frequency corresponding to each channel bandwidth, in order that the same OSR value would be kept for the different channel bandwidths. This technique is intended to optimize the power and area of the ADC that efficiently covers varying channel bandwidths. Moreover, we use the pole placement method to calculate the optimized filter coefficients of Continuous-Time Sigma-Delta (CT ΣΔ) ADC. Results and discussion: Over 5MHz, 7MHz and 10MHz channel bandwidths, the ADC achieved 72.89dB, 67.26dB and 66.47dB peak SNR values, respectively and a dynamic range of 73.5dB, 69.47dB and 66.5dB respectively with only 28mW, 28.2mW and 28.6mW power consumption respectively. Conclusions: The design of the proposed reconfigurable ADC intended for use in the mobile WiMAX standard were achieved. Moreover, the results obtained are satisfactory and are in accordance with theoretical expectations.

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