Ghada H. Ibrahim

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In this paper, the operation of super-regenerative (SR) receivers based on super-regenerative oscillators (SRO) is extended to enable the detection of QPSK modulated signals rather than traditional implementation of SR receivers to detect OOK signals. The ability of super-regenerative receivers to properly detect QPSK modulated signals enables using the(More)
BACKGROUND Sudan is classified as having insufficient progress in achieving the Millennium Development Goal (MDG-4), where the levels of child and infant mortality are among the highest in the region and the world. This study investigated factors associated with neonatal mortality in Sudan. Neonatal death is defined as death within the first 28 days of(More)
This paper presents a calibration study of dual-band image rejection receiver based on combined Weaver–Hartley architecture, with improved image rejection of first and second image signals. The system implementation is based on dual-band WLAN 802.11 a/g. When the desired signal is at 5.7-GHz band, the 2.4-GHz band becomes the first image signal and vice(More)
This paper investigates memristor based demodulators and proposes new circuit designs for Binary Frequency Shift Keying (BFSK) and circular 8-Quadrature Amplitude Modulation (QAM) demodulators using two memristors at most. The proposed designs consider utilizing the unique features of the memristor element, crucially, its variable average memristance with(More)
In this paper, a complete super-regenerative QPSK receiver is designed to operate at 2.4 GHz while being able to properly receive, process and demodulate incoming signal into raw digital data. The receiver front-end is comprised of an LNA and a super-regenerative oscillator (SRO), both merged for current reuse and lower power consumption. The front-end is(More)
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