Video compression can reduce the amount of data information for wireless multimedia sensornetworks(WMSNs). Compared with the traditional video coding algorithms, big gap existed in coding performance for Distributed ...
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Video compression can reduce the amount of data information for wireless multimedia sensornetworks(WMSNs). Compared with the traditional video coding algorithms, big gap existed in coding performance for Distributed Video Coding (DVC). In order to improve the efficiency of side information estimation, a novel hash-based side information estimation algorithm is proposed in this paper. For the regions of the Wyner-Ziv frame which cannot coding and decoding accurately, Discrete Cosine Transform (DCT) low-frequency coefficients of DCT is extracted according to the criteria of ROI for entropy coding. Then decoded DCT low-frequency coefficients for bidirectional hash motion estimation is utilized by decoder, which enables the decoder to choose between past and future reference frames for frame interpolation to generate best side information. Experimental results show that our proposed algorithm can gain more accurate motion estimation in the intense motion region. The algorithm can also reduce the rate, improve the quality of decoded image, and decrease the energy consumption of sensor nodes ultimately, which is important for WMSNs.
This paper focuses on determining the optimum transmission probability according to optimization criteria for two co-existing Ad hoc networks: the primary network and the secondary network with Nakagami-m fading. The ...
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A new building survey based on laser and pan is proposed, how to calibrate the scanning device be the key factor in this system. We proposed a algorithm which use a serial of reference points to get the actual positio...
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ISBN:
(纸本)9781457714146
A new building survey based on laser and pan is proposed, how to calibrate the scanning device be the key factor in this system. We proposed a algorithm which use a serial of reference points to get the actual position. Through the experiment scanning result can meet the request of survey.
In this paper, we propose a new cooperative modulation recognition algorithm based on the combination of feature fusion and decision fusion. Firstly, all the nodes in wirelesssensornetwork are divided into a number ...
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An improved MEW （ muhiplicative exponent weighting） algorithm, SLE-MEW is proposed for vertical handoff decision in heterogeneous wirelessnetworks. It introduces the SINR（ signal to interference plus noise ratio）...
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An improved MEW （ muhiplicative exponent weighting） algorithm, SLE-MEW is proposed for vertical handoff decision in heterogeneous wirelessnetworks. It introduces the SINR（ signal to interference plus noise ratio） effects, LS （least square） and information entropy method into the algorithm. An attribute matrix is constructed considering the SINR in the source network and the equivalent SINR in the target network, the required bandwidth, the traffic cost and the available bandwidth of participating access networks. Handoff decision meeting multi-attribute QoS（quality of serv- ice） requirement is made according to the traffic features. The subjective weight relation of decision elements is determined with LS method. The information entropy method is employed to derive the objective weights of the evaluation criteria, and lead to the comprehensive weight. Finally decision is made using MEW algorithm based on the attribute matrix and weight vector. Four 3GPP（ the 3rd generation partnership project） defined traffic classes are considered in performance evaluation. The simulation results have shown that the proposed algorithm can provide satisfactory performance fitting to the characteristics of the traffic.
As one of the most common application field of wirelessnetwork, Ad Hoc network has become a hot research topic in recent years. This paper presents a new routing protocol called CL-IAOR based on cross-layer design fo...
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Automatic modulation classification (AMC) has been intensively studied with a single communication receiver, but it is hard to recognize when the wireless communication environment with deep fading, shadow effect and ...
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Subcarrier and power allocation in orthogonal frequency division multiplexing (OFDM) relaying system has been regarded as a powerful method to improve system performance. A dual-hop OFDM relaying system employing deco...
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The PROMETHEE (Preference Ranking Organization METHod for Enrichment Evaluation) algorithm is applied in the vertical handoff decision technology for heterogeneous wirelessnetworks and researched on its performance. ...
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The PROMETHEE (Preference Ranking Organization METHod for Enrichment Evaluation) algorithm is applied in the vertical handoff decision technology for heterogeneous wirelessnetworks and researched on its performance. Four 3GPP defined traffic classes are considered in performance evaluation. An attribute matrix is constructed by considering the SINR in the source network and the equivalent SINR in the target network, the required bandwidth, the traffic cost and the available bandwidth of participating access networks. Handoff decision meeting multi-attribute QoS requirement is made according to the traffic features. The weight relation of decision elements is determined with Least Square (LS) method. Finally decision is made by using PROMETHEE algorithm based on the attribute matrix and weight vector. The simulation results show that the PROMETHEE algorithm can provide satisfactory vertical handoff performance and the proposed LS-PROMETHEE algorithm can be fit for the characteristics of the traffic.
In recent years, with the proposition of the concept of femtocell how to make optimal allocation of limited resources has become the main problem in femtocell networks. In this paper, a new dynamic distributed interfe...
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