In this paper, we present a scheme for teleporting multi-qudit quantum state, from the sender Alice to the receiver Charlie via many controllers Bobs, whose control parameters are obtained using entanglement swapping ...
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In this paper, we present a scheme for teleporting multi-qudit quantum state, from the sender Alice to the receiver Charlie via many controllers Bobs, whose control parameters are obtained using entanglement swapping of maximally d-dimensional EPR pair. In our scheme, Yang＇s qutrit controlled teleportation protocol [Commun. Theor. Phys. 49 （2008） 338] based on Bell-state entanglement swapping is generalized to the qudit case. The scheme of multi-qudit owns the advantage of having higher code capacity and better security than that of multi-qutrit.
The accuracy of magnitude prediction is crucial for steganalysis schemes that use high order statistics in wavelet domain. The steganalysis performance can be improved by avoiding large prediction errors. In this pape...
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Ground penetrating radar (GPR) is often used in detecting void and cavities under the airfield runway. Delay and Sum (DAS) imaging method based on time-domain focusing of pulse-echo radar data is commonly applied in i...
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OFDM multihop system is efficient scheme to save energy and extend coverage. In this paper, optimal resource allocation in OFDM multihop system, including arbitrary number of hops and subcarriers, is studied. By joint...
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ISBN:
(纸本)9781424443376
OFDM multihop system is efficient scheme to save energy and extend coverage. In this paper, optimal resource allocation in OFDM multihop system, including arbitrary number of hops and subcarriers, is studied. By joint subcarrier matching and power allocation, our goal is to maximize system capacity with the system-wide power constraint. First, we formulate the optimal subcarrier matching and power allocation problem as an optimization problem, which is a mixed binary integer programming problem and prohibitive to find the global optimum. Then, by utilizing the special structure of the system, we propose a low complexity resource allocation scheme, which is proved to be globally optimal. The simulations prove that the proposed scheme improves the system capacity.
The combination of multihop relay system and orthogonal frequency division multiplexing (OFDM) modulation is a promising way to increase capacity and extend coverage area. For OFDM two-hop relay system with separate p...
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ISBN:
(纸本)9781424443376
The combination of multihop relay system and orthogonal frequency division multiplexing (OFDM) modulation is a promising way to increase capacity and extend coverage area. For OFDM two-hop relay system with separate power constraints, we consider joint subcarrier matching and power allocation problem to maximize the system capacity, where the relay strategy is decode-and-forward. We formulate the optimal joint subcarrier matching and power allocation problem as an optimization problem, which is mixed binary integer programing problem and prohibitive to find global optimum in terms of complexity. By separating the subcarrier matching and power allocation, we provide the optimal scheme, i.e., optimal joint subcarrier matching and power allocation. Though simplifying the system architecture, the simulation proves that the one-to-one subcarrier matching is almost optimal.
A direction of arrival (DOA) estimator for wideband coherent signals with known waveforms and unknown amplitude is presented in this paper, which is extended from the estimation algorithm for time delay, referred to a...
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ISBN:
(纸本)9781849190107
A direction of arrival (DOA) estimator for wideband coherent signals with known waveforms and unknown amplitude is presented in this paper, which is extended from the estimation algorithm for time delay, referred to as WRELAX. The method can be called coherent space-time RELAX (CST-RELAX), which is a relaxation-based minimizer of a complicated nonlinear least squares cost function and is implemented in both space and time domain. Numerical examples in the presence of white and colored noise respectively are provided to demonstrate its performance and compare with other well-known algorithms including CSM (coherent subspace method) and wideband RELAX. The proposed method improves the estimation accuracy and has an excellent resolution.
As a newly emergent biometric technology, finger-vein recognition has attracted more attentions in personal identification. Generally, finger-vein images have low contrast and uneven illumination due to finger-vein im...
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Automatic target recognition technique, based on the projections in the samples range space, can be availably used in SAR target recognition. It requires that the relativity between the range spaces of different targe...
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In this paper, a robust method for synthetic aperture radar interferometry (InSAR) interferometric phase estimation is introduced. In the method, the optimal joint data vector is determined, the generalized correlatio...
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Parametric imaging methods for the curvilinear synthetic aperture radar (SAR) are always used the extracted three- dimensional (3-D) target feature (amplitude and 3-D position) to reconstruct the 3-D target image. The...
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ISBN:
(纸本)9781849190107
Parametric imaging methods for the curvilinear synthetic aperture radar (SAR) are always used the extracted three- dimensional (3-D) target feature (amplitude and 3-D position) to reconstruct the 3-D target image. Their efficient implementations, however, are only suitable for small synthetic aperture case. In this paper, a model is presented for describing the scatterer's echo received by large synthetic aperture, and based on this model, an efficient parametric method is proposed for imaging the 3-D target. The proposed method removes the coupling between the range and cross- range, which is introduced by range migration. With the decoupled data, the proposed method can replace the high dimensional search with a series of lower dimensional searches, which results in the feature estimates being extracted efficiently. The simulation results show that the method proposed in this paper can achieve the objective of the complex 3-D imaging, and the feature estimates can be reach the corresponding CRBs at low signal-to-noise ratio.
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