Articles

To utilize the available resources in an optical network efficiently. the tradeoff between spectral efficiency. DSP hardware complexity. and transparent reach needs to be optimized for different links in the network. Joint coding and modulation schemes offer more freedom to exploit the available four dimensions in these channels than traditional …

The Teager-Kaiser energy operator (TKO) belongs to a class of autocorrelators and their linear combination that can track the instantaneous energy of a nonstationary sinusoidal signal source. TKO-based monocomponent AM-FM demodulation algorithms work under the basic assumption that the operator outputs are always positive. In the absence of noise. this …

Iris recognition system for identity authentication and verification is one of the most precise and accepted biometrics in the world. Portable iris system mostly used in law enforcement applications. has been increasing more rapidly. The portable device. however. requires a narrow-bandwidth communication channel to transmit iris code or iris image. …

A new MFM-BDRM is proposed. solving the contradictory problem of the electromagnetic performance and the mechanical strength of MFM rotor in the traditional MFMBDRM. The proposed one has advantages of highly sinusoidal back EMF and low torque ripple. The maximum torque can be obtained when the optimal span ratio is …

DC electric power distribution systems have higher efficiency. better current carrying capacity and faster response when compared to conventional AC systems. They also provide a more natural interface with many types of renewable energy sources. Furthermore. there are fewer issues with reactive power flow. power quality and frequency regulation. resulting …

By considering real power forecast of DGs. reactive power ranges are better determined and used for day-ahead reactive power dispatch of distribution networks. In particular. errors of real power forecast have been used to estimate probability distribution of reactive power outputs available for achieving optimal power flow and reducing network …

The operational transconductance amplifier (OTA) is a basic building block used in many analogue and mixed-mode circuits such as analogue-to-digital (A D) converters and switched-capacitor filters that require fast settling and precise amplifiers [1]. Recently. the folded cascode (FC) amplifier has gained preference over the telescopic owing to the low …

As the supply voltage of a circuit decreases. noise immunity becomes more important to guarantee signal integrity. This paper presents a method of improving noise immunity applicable to subthreshold circuits. The traditional method for immunity enhancement is to use a Schmitt trigger. which requires an additional current path to adjust …

In a nutshell. the paper advocates for applying IoT architecture in providing smarter. connected and personalized healthcare solutions in smart homes. Their requirements for such healthcare services are analyzed and are translated into a functional architecture. Its components are mapped onto physical infrastructure. The components are described and their novel …

A hierarchical control approach was proposed for optimal operation of greenhouses in the context of smart grids. which includes novel mathematical models for the optimal operation scheduling of greenhouse’ electricity. gas. and heat systems. Thus. optimization models were formulated to optimally operate supplementary lighting. CO2 generation. air circulation and ventilation. …