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Smart environment has been evolved as a hot research topic with the development of machine learning algorithms and wireless communication technologies. Existing smart home solutions usually need inhabitants to operate device controllers directly. However, for people with disabilities, it is inconvenient and difficult to perform such manual operations. Therefore, it is important to develop automatic...
Datagram Congestion Control Protocol (DCCP) is a transport protocol fits for real-time multimedia applications by processing congestion control and unreliable transmission. DCCP takes on a good performance in wired network while causes a substantial decline in wireless networks. This paper analyzes DCCP CCID-3 in wireless ad hoc networks and mainly focuses on two factors that impact the protocol performance...
In this paper, we propose a filter-and-forward (FF)beamforming strategy in the secondary relays for the one-way cognitive relay network with frequency selective fading channels. Our aim is to optimize the beamforming coefficients and the secondary transmitted power to maximize the SINR at the secondary destination, while satisfying the interference constraint on the primary network and the total relays'...
Noncoherent pulse-position modulation (PPM) with simple channel codes has the potential to realize ultra-low power (ULP) wireless design. In this paper, we develop a Wagnerlike decoding rule for single-parity-check and high-rate Reed-Solomon (RS) coded PPM schemes by simply ‘flipping’ the most unreliable received PPM symbol(s) to obtain a good balance between performance and coding complexity. The...
This article mainly from the start of the radio signal propagation characteristics, and connecting with the reality, according to the actual situation of some aera, the three typical environment of the topography for signal channel test and modeling is choosen. Through to the research of the zone VHF/UHF band, and a positive approach of the channel test and modeling are got.
This is Part III of the wireless tomography three-paper series. Wireless tomography is related to wireless communications in that it requires the channel recovery between different waveforms at transmit and receive, as well as multiple-input-multiple-output (MIMO) communication system. According to the pulse propagation mechanisms of reflection and diffraction, ultra-wideband (UWB) waveforms suffer...
Recently, cooperative communication is shown to be a promising approach to achieve spatial diversity. The performance improvement by cooperative communication heavily depends on selecting suitable relay node. Therefore, designing effective relay assignment algorithm becomes critical in wireless cooperative networks. Although many studies focus on relay assignment problem, none of them concerns the...
Due to unstable link states, broadcasting transmission pattern, and interference between neighbor nodes, routing in wireless mesh network (WMN) is much more complicated and unpredictable than wired network. As the simplest and most primitive routing metric, hop count does not always work well in WMN where routing with least hop count does not bring the best performance. Recent research shows that...
With wireless communication technology and modularization design strategy, a novel automatic passenger train water supply system is proposed. Three combination schemes of the proposed system is expatiated, and the design principle, working principle and wireless coding and decoding circuits of the corresponding remote control solenoid valves module, portable remote control module, sensors and special...
This paper proposes an enhanced adaptive forward error correction (EAFEC) algorithm based on cross- layer design for wireless media streaming, in the hope that the media could be played on receivers with high quality. This algorithm, which uses the Poisson process to predict the current network condition, can adjust the sending rate of MPEG video frame adaptively and allocate the network bandwidth...
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