Trabelsi Hatem

Mr Trabelsi Hatem
Associate Professor

Sfax University
Address: ENIS 0 Tunisia

Trabelsi Hatem


Amel Neifar, Ghazi Bouzid, Hatem Trabelsi and Mohamed Masmoudi

Design of Ultra Wideband Oscillator in 0.18 ?m Standard CMOS Technology , 1st International Conference on Advanced Technologies for Signal and Image Processing - ATSIP'2014 March 17-19, 2014, Sousse, Tunisia , 0000-00-00
This paper describes the design of a 3-5 GHz oscillator for Impulse-Radio Ultra-Wideband (IR-UWB) transceiver in the 0.18?m CMOS technology. The most important specifications for the voltage control oscillator (VCO) are provided and architecture for an existing frequency plan is introduced along with a discussion on its performance and implementation. The simulated VCO can achieve very wide tuning range along with low phase noise performance that varies from -92.02dBc/?Hz to -73dBc/Hz at 1 MHz frequency offset from the carrier and the overall power consumption is 18.1 mW from a 1.8V voltage supply.

Amel Neifar, Hatem Trabelsi, Ghazi Bouzid and Mohamed Masmoudi

Design of a zero crossing BFSK demodulator for a wireless sensor , 2012 International Conference on Design & Technology of Integrated Systems in Nanoscale Era , 0000-00-00
In this paper, a transistor-level simulation result of a Zero crossing BFSK demodulator is presented. The detector will be integrated into a frequency-hopped spread spectrum receiver operating in the 863-870 MHz ISM band, using the zigbee protocol (IEEE 802.15.4). This end to demodulate a received bit sequence with a bit rate equal to 20 kbps using 0.35 m CMOS technology and a 3V power supply. The proposed demodulator dedicated to an application of low power and low cost can maintain good performance under process variation. The BER results show that the proposed demodulator needs only 10.9dB input signal_to_noise ratio to achieve a BER of 10-3 as specified in zigbee standard.

Amel Neifar, Hatem Trabelsi, and Mohamed Masmoudi

An FSK Demodulator Design for RF Wireless Sensor Applications Using Zigbee Protocol , International Journal of Electronics and Electrical Engineering Vol. 3, No. 4, August 2015 , 0000-00-00
In this paper, transistor-level simulations of a detector called “cross-differentiate-multiplier demodulator (CDM)” are presented. This detector, which uses three blocks (a differentiator, a multiplier and a subtractor), is able to demodulate a received bit sequence, that was transmitted using a frequency-shift keying modulation scheme, with a bit rate equal to 20kbps. The application of this detector will be in a wireless sensor receiver operating in the 863-870MHz ISM band. In this sensor, a frequency hopping spread spectrum is used as modulation technology and Zigbee (IEEE 802.15.4) as the communication protocol. Design is performed using 0.35?m CMOS technology and a 3V supply. A comparison between the performances of different architectures studied, mainly in terms of BER, is presented at the end of this document.