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Attitude jitter is a common problem for high-resolution earth-observation satellites and can diminish the geo-positioning and mapping performance of observed images. It is especially necessary to address this problem when high-performance attitude measurements are unavailable. Therefore, an attitude jitter correction method for multispectral parallax imagery that utilizes the compressive-sensing technology...
In cognitive radio networks, the performance of energy detection will be degraded significantly due to the cluster overlapping caused by noise uncertainty. To alleviate the noise uncertainty effect, a novel machine learning algorithm is proposed in this paper for cooperative spectrum sensing. The proposed algorithm incorporates fuzzy support vector machine and nonparallel hyperplane support vector...
This paper investigates the use of wireless power transfer (WPT) for measurement sensing and information transmission in a wireless sensor network (WSN) performing distributed parameter estimation using an adaptive diffusion least meansquares (LMS) strategy. We consider a hybrid WSN consisting of common sensor nodes (CNs) and super sensor nodes (SNs) that are capable of WPT. In each diffusion iteration,...
We consider a multi-input-single-output (MISO) system where a wireless power transmitter sends wireless power to a receiver via beamforming using the estimated channel, and the power receiver uses the harvested energy to power some applications. We consider transmissions based on frames each of which consists of the channel estimation phase, the feedback phase, the wireless power transfer phase, as...
We consider the scenario in which multiple sensors send spatially correlated data to the fusion center (FC) via independent Rayleigh-fading channels with additive noise. Assuming that the sensor data is sparse in some basis, we show that the recovery of the signal can be formulated as a compressive sensing (CS) problem. To model the scenario where sensors operate with intermittently available energy...
This paper presents a closed-loop switched-capacitor interface for high-quality bulk micro-mechanical accelerometer. Analogue force feedback is realized to establish an electro mechanical closed-loop so as to improve the dynamic range. The feedback accuracy is guaranteed by applying bottom-plate sampling structure in the feedback controller. A proportional derivative controller is introduced to compensate...
In this paper, we propose a service handover supporting scheme under the help of wireless sensors in hybrid wireless-optical broadband access network (WOBAN). In this scenario, users can maintain access to their services uninterrupted even while moving or changing terminals. The hybrid network is composed of Ethernet-based passive network (EPON) and wireless network. The function of middleware developed...
This paper presents a large dynamic range, low noise integrated circuit for readout of a bulk micro-machined vibratory gyroscope. With the proposed sinusoidal chopper technique and the differential-common Duo-Opamp structure, three main objectives are achieved: the low frequency noise cancellation; the biasing of the high impedance nodes in a traditional fully-differential circuit; and the high linearity...
This paper proposes a quantitative method to describe how complex an environment looks to an individual robot. The assumption is that robots are designed to perform a task in a specific setting or group of settings. The structure of the environment and knowledge the robot has about the environment determine how sophisticated the robot hardware and control algorithms need to be to perform a given task...
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