Transmitter Side

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The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Stojan Radic - One of the best experts on this subject based on the ideXlab platform.

Eduardo Temprana - One of the best experts on this subject based on the ideXlab platform.

Chun Sing Cheng - One of the best experts on this subject based on the ideXlab platform.

  • use of Transmitter Side electrical information to estimate system parameters of wireless inductive links
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Jeff Powa Chow, Henry Shuhung Chung, Chun Sing Cheng, Wenguan Wang
    Abstract:

    The power transfer efficiency and power transfer characteristics of wireless inductive links are determined by several intrinsic and extrinsic factors, such as coupling coefficient, quality factors, matching conditions of the transmitting and receiving coils, and operating frequency. The nominal component values, such as the capacitors used in matching the coils, are chosen by conSidering the optimal power transfer efficiency and power transfer requirement at the nominal operating condition. However, due to manufacturing tolerance, temperature effect, and aging, electronic components are subject to parameter variations. Such unavoidable issue would cause performance degradation of the link. Typically, it is tackled by conducting on-the-spot measurements of the electrical quantities together with sophisticated communication links and protocols to provide the Transmitter with the operating condition of the receiver. To reduce system complexity, this paper presents another perspective by processing Transmitter-Side electrical information with an evolutionary computation technique to estimate several system parameters, including coil inductances and quality factors, resonant frequencies of the transmitting and receiving networks, and coupling coefficient, for the Transmitter to manage power transfer. The proposed technique has been applied to a 4-W wireless-powered LED driver prototype for regulating the load power under parametric variations.

  • online regulation of receiver Side power and estimation of mutual inductance in wireless inductive link based on Transmitter Side electrical information
    Applied Power Electronics Conference, 2016
    Co-Authors: Jeff Powa Chow, Henry Shuhung Chung, Chun Sing Cheng
    Abstract:

    It is well-known that the power transfer efficiency and the power transmitted over a wireless inductive link are significantly affected by the strength of the magnetic coupling and the spatial displacement between the transmitting and receiving coils. Misalignment between the transmitting and receiving coils is practically unavoidable. In order to control and regulate the receiver-Side power, on-the-spot measurement of electrical quantities and establishment of communication link between the Transmitter and receiver are typically required. This paper will present an investigation into the use of the Transmitter-Side electrical information to estimate the mutual inductance and regulate the power consumption of the receiver Side. The nonlinear characteristics of the diode-bridge rectifier are taken into account in the mathematical formulations. The proposed technique is successfully implemented on a 4W wireless-powered LED driver prototype. Experimental results reveal that the LED power can be regulated within ±25% spatial misalignment over the operating zone. The estimated mutual inductance is also found to be in close agreement with the theoretical predictions.

  • use of Transmitter Side electrical information to estimate mutual inductance and regulate receiver Side power in wireless inductive link
    IEEE Transactions on Power Electronics, 2016
    Co-Authors: Jeff Powa Chow, Henry Shuhung Chung, Chun Sing Cheng
    Abstract:

    It is well-known that the power transfer efficiency and the power transmitted over a wireless inductive link are significantly affected by the strength of the magnetic coupling and the spatial displacement between the transmitting and receiving coils. Misalignment between the transmitting and receiving coils is practically unavoidable. In order to control and regulate the receiver-Side power, on-the-spot measurement of electrical quantities and establishment of communication link between the Transmitter and receiver are typically required. This paper will present an investigation into the use of the Transmitter-Side electrical information to estimate the mutual inductance and regulate the power consumption of the receiver Side. The nonlinear input voltage–current characteristics of the diode-bridge rectifier, which causes current distortions in the system, are taken into account in the mathematical formulations. The proposed technique is successfully implemented on a 4-W wireless-powered LED driver prototype. Experimental results reveal that the LED power can be regulated within ±25% spatial misalignment over the operating zone. The estimated mutual inductance is also found to be in close agreement with the theoretical predictions.

Erik Agrell - One of the best experts on this subject based on the ideXlab platform.

  • antialiased Transmitter Side digital backpropagation
    IEEE Photonics Technology Letters, 2020
    Co-Authors: Magnus Karlsson, Erik Agrell
    Abstract:

    Digital backpropagation (DBP) is an electronic scheme for compensating nonlinear distortions in fiber transmission systems. Due to the nonlinearity-induced spectral broadening, the data must be oversampled to avoid aliasing, which increases the complexity and power consumption of the scheme. In this work, we show that aliasing can alternatively be prevented by distributed antialiasing filters, at a lower complexity. We proposed a new modified split-step Fourier method (SSFM) with easy-to-implement low-pass filters (LPFs) in the linear steps to avoid aliasing due to spectral broadening. Both the forward fiber propagation and a Transmitter-Side DBP are simulated using the modified SSFM. High-order modulation formats such as 256-ary quadrature-amplitude-modulation (256-QAM) and 1024-QAM transmissions at 28 Gbaud and 64 Gbaud over 1000 km fiber are conSidered, and our results show that the complexity of the DBP can be reduced by up to 50%. The optimal bandwidth of the LPFs is studied for both forward propagation and the DBP.

  • Optimization of Transmitter-Side Signal Rotations in the Presence of Laser Phase Noise
    Journal of Lightwave Technology, 2020
    Co-Authors: Arni F. Alfredsson, Erik Agrell, Magnus Karlsson, Henk Wymeersch
    Abstract:

    The effects of Transmitter-Side multidimensional signal rotations on the performance of multichannel optical transmission are studied in the presence of laser phase noise. In particular, the laser phase noise is assumed to be uncorrelated between channels. To carry out this study, a simple multichannel laser-phase-noise model that has been experimentally validated for weakly-coupled multicore-fiber transmission is conSidered. As the conSidered rotation scheme is intended to work in conjunction with receiver-Side carrier phase estimation (CPE), the model is modified to further assume that imperfect CPE has taken place, leaving residual phase noise in the processed signal. Based on this model, two receiver structures are derived and used to numerically optimize Transmitter-Side signal rotations through Monte Carlo simulations. For reasonable amounts of residual phase noise, rotations based on Hadamard matrices are found to be near-optimal for transmission of 4-D signals. Furthermore, Hadamard rotations can be performed for any dimension that is a power of two. By exploiting this property, an increase of up to 0.25 bit per complex symbol in an achievable information rate is observed for transmission of higher-order constellations.

Jeff Powa Chow - One of the best experts on this subject based on the ideXlab platform.

  • use of Transmitter Side electrical information to estimate system parameters of wireless inductive links
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Jeff Powa Chow, Henry Shuhung Chung, Chun Sing Cheng, Wenguan Wang
    Abstract:

    The power transfer efficiency and power transfer characteristics of wireless inductive links are determined by several intrinsic and extrinsic factors, such as coupling coefficient, quality factors, matching conditions of the transmitting and receiving coils, and operating frequency. The nominal component values, such as the capacitors used in matching the coils, are chosen by conSidering the optimal power transfer efficiency and power transfer requirement at the nominal operating condition. However, due to manufacturing tolerance, temperature effect, and aging, electronic components are subject to parameter variations. Such unavoidable issue would cause performance degradation of the link. Typically, it is tackled by conducting on-the-spot measurements of the electrical quantities together with sophisticated communication links and protocols to provide the Transmitter with the operating condition of the receiver. To reduce system complexity, this paper presents another perspective by processing Transmitter-Side electrical information with an evolutionary computation technique to estimate several system parameters, including coil inductances and quality factors, resonant frequencies of the transmitting and receiving networks, and coupling coefficient, for the Transmitter to manage power transfer. The proposed technique has been applied to a 4-W wireless-powered LED driver prototype for regulating the load power under parametric variations.

  • online regulation of receiver Side power and estimation of mutual inductance in wireless inductive link based on Transmitter Side electrical information
    Applied Power Electronics Conference, 2016
    Co-Authors: Jeff Powa Chow, Henry Shuhung Chung, Chun Sing Cheng
    Abstract:

    It is well-known that the power transfer efficiency and the power transmitted over a wireless inductive link are significantly affected by the strength of the magnetic coupling and the spatial displacement between the transmitting and receiving coils. Misalignment between the transmitting and receiving coils is practically unavoidable. In order to control and regulate the receiver-Side power, on-the-spot measurement of electrical quantities and establishment of communication link between the Transmitter and receiver are typically required. This paper will present an investigation into the use of the Transmitter-Side electrical information to estimate the mutual inductance and regulate the power consumption of the receiver Side. The nonlinear characteristics of the diode-bridge rectifier are taken into account in the mathematical formulations. The proposed technique is successfully implemented on a 4W wireless-powered LED driver prototype. Experimental results reveal that the LED power can be regulated within ±25% spatial misalignment over the operating zone. The estimated mutual inductance is also found to be in close agreement with the theoretical predictions.

  • use of Transmitter Side electrical information to estimate mutual inductance and regulate receiver Side power in wireless inductive link
    IEEE Transactions on Power Electronics, 2016
    Co-Authors: Jeff Powa Chow, Henry Shuhung Chung, Chun Sing Cheng
    Abstract:

    It is well-known that the power transfer efficiency and the power transmitted over a wireless inductive link are significantly affected by the strength of the magnetic coupling and the spatial displacement between the transmitting and receiving coils. Misalignment between the transmitting and receiving coils is practically unavoidable. In order to control and regulate the receiver-Side power, on-the-spot measurement of electrical quantities and establishment of communication link between the Transmitter and receiver are typically required. This paper will present an investigation into the use of the Transmitter-Side electrical information to estimate the mutual inductance and regulate the power consumption of the receiver Side. The nonlinear input voltage–current characteristics of the diode-bridge rectifier, which causes current distortions in the system, are taken into account in the mathematical formulations. The proposed technique is successfully implemented on a 4-W wireless-powered LED driver prototype. Experimental results reveal that the LED power can be regulated within ±25% spatial misalignment over the operating zone. The estimated mutual inductance is also found to be in close agreement with the theoretical predictions.

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