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A general form of Dolph-Chebyshev weighting methods is summarized for uniform linear arrays, uniform rectangular arrays and uniform cube arrays. In this paper, we adopt beamforming technique with both uniform amplitude weighting method and Dolph-Chebyshev amplitude weighting method to detect the channel multipaths. Numerical simulation results demonstrate the effectiveness of the sidelobe suppression...
When the array apeture increases to a huge extent (e.g. tens to hundreds of wavelengths), and the distances between transmitter, scatterers, and receiver are small, conventional plane-wave model cannot be used to characterize the impinging wave accurately anymore. To avoid model mismatch during estimation, in this paper, we use spherical-wave model as the generic signal model, and estimate parameters...
Beamforming algorithms are expected to be extensively utilized in mm-wave systems to improve system performance. In this paper, we discuss three different beamforming algorithms based on uniform circular arrays (UCAs), i.e. classicial beamfomer, coventional frequency invariant beamformer. Numerical simulation results and channel sounding measurement results at mm-wave are provided to demonstrate and...
A comprehensive behavioral model of Track-and-Hold Amplifier (THA) based on GaAs HBT, implemented in MATLAB-SIMULINK platform, is presented in this paper. The main error sources of the holding capacitor and non-linear on-resistance are investigated, and the relative non-idealities are modeled. With the behavioral model, SIMULINK simulations were performed to analyze the non-ideal error sources and...
Millimeter wave (mm-wave) bands offer vast amounts of unlicensed and unused spectrum that could potentially be utilized by future (5G) wireless systems. Accurate channel characterization at mm-wave bands is required for system design and performance analysis of future 5G communication systems. Knowledge of delay and angle of arrival (AoA) of the incoming multipath components are especially important...
This paper discusses a radio channel model for evaluation of coming 5G techniques and systems, emphasizing the expected utilization of higher frequency bands. The METIS map-based model utilizing ray tracing principles is firstly described. To investigate frequency dependency of channel parameters for millimetre wave communications, simulations with the described METIS map-based model in six different...
Accurate characterization of spatial multipath channels at millimeter wave bands is important for system design and performance evaluation of future wireless systems. Channel measurements were conducted at two representative indoor scenarios at 26–30 GHz, i.e., a large unfurnished basement and a small furnished indoor office. A vector network analyzer connected to a rotational directional horn antenna...
Accurate characterization of multipath channels at millimeter wave bands has gained significant interest both from industry and academia. An understanding of frequency dependence of channel characteristics is important. A channel measurement campaign was conducted in an indoor environment at three different frequency bands, i.e. 2–4 GHz, 14–16 GHz and 28–30 GHz, respectively. Two representative scenarios,...
In this paper, an online scheduling algorithm based on Lyapunov optimization for smart energy management in household micro-grids is proposed. Household appliances are classified into baseline load and controllable load. The consumption power of controllable appliances Electric Water Heater (EWH), Heating, Ventilation and Air Conditioning (HVAC) and Pure Electric Vehicle (PEV) are set as decision...
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