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In this paper, we propose a scheme for robust wireless video conference system based on symbol-level network coding (NC). Network coding allows to increase the throughput (because the number of downlink transmissions from base station to all participants is reduced). We develop three systems, one based on the simplest NC conception, which forms a new symbol by taking the binary sum or XOR of the received...
Synchronization is a key problem of orthogonal frequency division multiplexing (OFDM) systems. OFDM is very sensitive to synchronization error, especially the symbol timing synchronization error. Two new methods of timing synchronization estimation for OFDM systems based on the former synchronization method are proposed, which both utilize new training sequence and estimators to overcome the shortcomings...
In the pursuit of robust object tracking, both particle filter and mean-shift algorithm have proven successful approaches. Also both of them have weaknesses. The article presents the integration of mean-shift algorithm with particle filtering during the moving object tracking. In our method mean-shift algorithm is used in the sampling steps of particle filtering, which efficiently reduces the number...
The Wireless Sensor Network (WSN) is one of the core technologies to form the future networks. A WSN is typically composed of numerous tiny energy-constrained sensor nodes with limited information processing and data storage capabilities, thus, the energy-efficient strategy is the key issue in designing protocols for WSN. All IPv6-based addressing is suitable for the seamless integration between WSN...
Background subtraction is widely used in detecting moving objects in a static scene, which requires a fixed camera, and a static background. Most background subtract algorithms require the illumination changing slowly, so can be tracked and updated. If the illumination changes fast and non-monotony, many algorithms fail. Here we research one special condition in changing illumination: single continuous...
The study of peer-to-peer network and vehicle ad hoc network (VANET) are currently two hotspots in distributed computing and mobile communication researching domain. By building up a P2P overlay network on top of VANET's physical infrastructure, we effectively integrated P2P network's advantage on sustaining highly dynamic network into the design of VANET routing protocol. By deploying passive VANET...
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