A GSM-GPRS/UMTS FDD-TDD/WLAN 802.11a-b-g Multi-Standard Carrier Generation System

Koukab, Adil; Lei, Yu; Declercq, M.

doi:10.1109/jssc.2006.873928

Cited by 47 publications

(26 citation statements)

References 29 publications

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“…This energy is the sum of energy required to switch between the internal states of the MCU given by (14) and the leakage energy which refers to the energy lost while the MCU is idle modeled by (15).…”

Section: K Microcontrollers Energy Efficiencymentioning

confidence: 99%

Efficiency Evaluation Metrics for Wireless Intelligent Sensors Applications

Chakkor¹,

Cheikh²,

Baghouri³

et al. 2014

IJISA

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Abstract-The metrology field has been progressed with the appearance of the wireless intelligent sensor systems providing more capabilities such as signal processing, remote multisensing fusion etc. This kind of devices is rapidly making their way into medical and industrial monitoring, collision avoidance, traffic control, automotive and others applications. However, numerous design challenges for wireless intelligent sensors systems are imposed to overcome the physical limitations in data traffic, such as system noise, real time communication, signal attenuation, response dynamics, power consumption, and effective conversion rates etc, especially for applications requiring specific performances. This paper analyzes the performance metrics of the mentioned sensing devices systems which stands for superior measurement, more accuracy and reliability. Study findings prescribe researchers, developers/ engineers and users to realizing an optimal sensing motes design strategy that offers operational advantages which can offer cost-effective solutions for an application.

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Section: K Microcontrollers Energy Efficiencymentioning

confidence: 99%

Efficiency Evaluation Metrics for Wireless Intelligent Sensors Applications

Chakkor¹,

Cheikh²,

Baghouri³

et al. 2014

IJISA

View full text Add to dashboard Cite

show abstract

“…The varactors can be optimized in a second stage, by decreasing their sizes, and thus, their sensitivity. Afterwards, a digitally controlled bank of capacitors, and if necessary, a set of dividers and mixers [8], can be added to meet the tuning range specification. The equivalent parallel resistance, representing the loss in the tank, is shown in the figure.…”

Section: Frequency Conversion Of the Noise In Lc Vcomentioning

confidence: 99%

Reactive Power Imbalances in LC VCOs and Their Influence on Phase-Noise Mechanisms

Koukab

2011

IEEE Trans. Microwave Theory Techn.

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Abstract-Phase-noise mechanisms in cross-coupled LC voltagecontrolled oscillators (VCOs) are reviewed based on a physical understanding of reactive power imbalances in the tank and in the active part. These phenomena are proven to be the predominant phase-noise degradation mechanism in relatively low-and highcurrent operations. Based on this analysis, a technique to suppress these detrimental effects is developed and implemented in an LC VCO design. The measured results confirm the dependencies predicted by the analysis, and the usefulness of the proposed technique to simultaneously optimize the phase noise at high and low offset frequencies. The measured VCO tuning range is 600 MHz, ranging from 2.4 to 3 GHz. The VCO-prescaler circuit exhibits a phase noise from 88 to 92 dBc/Hz at 15 kHz and from 155 to 160 dBc/Hz at 10 MHz, when the power consumption is 6 and 10 mA for the VCO and 2 mA for the prescaler, and the power supply is 2 V.Index Terms-Flicker noise, phase noise, power supply rejection (PSR), thermal noise, voltage-controlled oscillator (VCO).

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“…The Cross-coupled CMOS LC voltage controlled oscillators (VCO) have become the most widely used topologies in RF design thanks to their exceptional noise performances [1][2]. However, the emerging communication technologies (mainly OFDM-based broadband standards) and multi-standard requirements impose severe constraints in terms of frequency precision, tuning range and near carrier phase noise [2].…”

Section: Introductionmentioning

confidence: 99%

“…However, the emerging communication technologies (mainly OFDM-based broadband standards) and multi-standard requirements impose severe constraints in terms of frequency precision, tuning range and near carrier phase noise [2]. On the other hand, the VCO design difficulties are exacerbated by the technology and voltage scaling.…”

Section: Introductionmentioning

confidence: 99%