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Agricultural land use is essential for prosperity and sustainability of a city. However, the performance of detecting agricultural land use based on vegetation parameters will be substantially reduced when the vegetation changed in type, quantity and condition. This study believed that soil moisture, a fundamental soil parameter, is able to detect agricultural land use. A method was proposed to evaluate...
The technique of massive multiple-input multiple-output (MIMO) in 5G cellular systems could greatly increase the cell coverage size and boost the signal-to-noise power ratio (SNR) for cell-edge UE. However, the suitable beam acquisition for the target cell during handover procedure would greatly increase handover latency and cause service interruption. This paper proposes an enhanced automatic neighbor...
In this paper, based on double auction and cell membrane optimization, a novel cloud resource management scheme is proposed with the economic methods adopted and the characteristics of resources and market in cloud environment considered. In the proposed scheme, the resources are priced by double auction, and the best solution for cloud resource allocation is got by cell membrane optimization algorithm...
With the rapid development of the Internet and the popularization of mobile devices, participating in a mobile community becomes a part of daily life. This study aims the influence impact of social interactions on mobile learning communities. With m-learning content recommendation services developed from mobile devices and mobile network techniques, learners can generate the learning stickiness by...
As a new model of distributed computing, all kinds of distributed resources are virtualized to establish a shared resource pool through cloud computing. The target of cloud computing is to provide convenient and configurable resource for users with pay-per-usage charging model. Therefore, the reasonable and efficient mechanism for resource allocating is becoming a hot spot in research. According to...
In this paper, an ultra-low-power and low-noise amplifier is presented for 90-nm CMOS RF frontends. By employing current-reused, and forward-body-bias techniques, a low-noise amplifier (LNA) can operate at a reduced supply voltage with micro-watt dc power consumption while maintaining reasonable gain performance at millimeter-wave frequencies. To reduce noise factor and bias current simultaneously,...
The traditional proportional fair scheduling algorithm can only provide users with limited fairness while the channel is changing. To solve this problem and enhance the fairness between users, an adaptive proportional fair scheduling algorithm for LTE (Long term Evolution) system is proposed. It adjusts the scheduling priority according to individual user's channel condition. The proposed algorithm...
This paper deal with the problem of direction-of-arrival (DOA) estimation with a polarization sensitive array. The proposed DOA estimation method is based on a sparse representation of polarization sensor measurements with an overcomplete basis composed of samples from the polarization sensitive array manifold. It enforces sparsity by ??1-norm to obtain a sharp amplitude estimate of the sparse solution...
Hyperspectral unmixing aims at identifying the hidden spectral signatures (or endmembers) and their corresponding proportions (or abundances) from an observed hyperspectral scene. Many existing approaches to hyperspectral unmixing rely on the pure-pixel assumption, which may be violated for highly mixed data. A heuristic unmixing criterion without requiring the pure-pixel assumption has been reported...
Fading is one of the common characters of a wireless channel. Many rate adaptation mechanisms were proposed to enhance the IEEE 802.11 systems, but these may cause multiple rates in a single network. However, IEEE 802.11 DCF faces the performance anomaly in multi-rate network, that is, when the stations with different rates collide, the low-rate station will greatly degrade the high-rate station....
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