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This paper evaluates the idle users' cell selection performance for 3GPP LTE system. The focus is on the impact that reference signal received power (RSRP) strength based cell selection algorithm have on the system performance measured in terms of number of cell reselections, time between two consecutive reselections and uplink SINR for an idle user to experience a reselection. Further, the call blocking...
Vertical handover decision (VHD) and radio resource allocation for the handover UE (RRA) are two important issues in the integration of heterogeneous wireless networks, which are mainly considered separately for network utility problems, although both of them interact from the perspective of temporal dimension. The ergodic utility based joint-optimization algorithms should outperform that independent...
In this paper, we study energy-efficient channel aggregation problem in cognitive radio networks, where a secondary user senses multiple channels simultaneously or sequentially in the sensing period and subsequently aggregate those channels sensed free. We aim at designing the optimal sensing time and power allocation to achieve the maximum energy efficiency, meanwhile considering the maximum transmit...
An on-chip protection network is introduced providing high immunity to component and system level stress. It uses active MOSFET rail clamps with novel RC triggering and clamp layout schemes.
Using particle swarm optimization (PSO) to optimize BP neural network model is proposed in this paper. The new model is more quickly and accurate. The basic idea of this model is: Firstly PSO is used to optimize the BP neural network's initialized weights, an optimized result is got; then based on the optimized result the BP neural network is used for further optimization. We can use this model for...
To get the mechanical properties of wiper motors without speed and torque sensors, a novel approach using wavelet ridge is introduced. The essential theory for testing mechanical properties without speed and torque sensors is discussed, and the relationship between wavelet ridge and instantaneous frequency is given. The approach to calculating the mechanical properties based on wavelet ridge is presented,...
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