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Given to the non-line-of-sight (NLOS) error existing in the location of wireless sensor network (WSN), together with the strong anti-noise ability, good data approximation and flexible parallel data processing ability of BP neural network, the method of using BP neural network to optimize the location of WSN nodes is put forward in this paper. Firstly, the source of error is analyzed. Then the traditional...
KNX/EIB bus as the only global international open standards in the field of home and building control, has been extensively used in intelligent automation control field. This paper designed the smart home that based on KNX/EIB bus control system and the for optimization system design, use comprehensive multi-types and multi-brand nodes in max degree, build the form of the field bus network that more...
This paper presents a new system for human gait data acquisition and analysis. The system is based on a network of wearable nodes with embedded sensors, which consists of two data acquisition nodes and a handled control center node. And the system is not restricted to a specific environment in the experiment. In this paper, we discuss the initial design of the hardware for data acquisition and the...
The paper aims to design video wireless sensor nodes based on IEEE 802.11 communication protocols, using SPI interfaces on the connection of the WIFI communication module and the host controller for data exchange because of the fact that there exist limitations in terms of the display of live video images due to Zigbee transmission rate limit. In addition, the video wireless WIFI sensor node also...
Blind signature is a special anonymous technique, it can realize the anonymity of the signed message. A common blind signature is achieved in PKI and ID-based cryptography. However, self-certified signature scheme is a better choice than that in traditional public key system and ID-based cryptography, since it omits key escrow problem of ID-based crypto-system and avoids complex certificate management...
Modeling and simulation of Ethernet's underlying protocol is an important method of the comprehensive evaluation and network optimization. At present a large amount of simulation and modeling of the existing MAC protocols are based on traditional CSMA/CD protocol. Currently not so much attention is paid to adaptive MAC protocol. This paper proposes a new adaptive protocol algorithm of p-persistent...
Localization of sensors is one core technique in wireless sensor networks (WSN). A localization algorithm (BHLA) based on hops for large-scale wireless sensor networks is presented in the paper. In the BHLA algorithm, nodes are divided into anchor nodes and unknown nodes. Unknown node can communicate with the anchor nodes which are covered in this unknown node' communication range. Firstly, the distance...
Wireless Multimedia Sensor Networks (WMSN) has been one challenge category of special wireless sensor networks. Different-view videos captured by cameras in various different locations are typical multi-view videos. In order to reduce transmission quantity and conserve nodes' energy, traditional multi-view video coding approaches are long suitable for WMSN. In this paper, we propose a multi-view video...
Mobile security draws more attention while the mobile device gains its popularity. Malwares just like viruses, botnet and worms, become concerns since the frequently leakage of personal information. This paper investigates malicious attacks through Bluetooth and malwares in different operating systems of mobile devices such as Blackberry OS, iOS, Android OS and Windows Phone. Besides, countermeasures...
The temperature and moisture of single soil layer is difficult to represent the real growth environment around crop root. The measurement of temperature and moisture in multilayer and multipoint soil is easy to know water demand around crop root during its growth period deeply and accurately. It also can improve the water utilization coefficient and achieve basic data for the research on soil water...
Both the spatial and temporal distributions of received signal power in wireless communications are often modeled as log-normal without any further discussion. This paper presents a field study of temporal signal fading in a test site situated in an area of boreal forest near Mandy Lake, Alberta. In it we give a statistical verification of the assumption that temporal signal fading obeys the log-normal...
According to the application of the dithering signal in Analog-to-Digital Conversion (ADC), this paper proposes an optimum condition of the dithering signal against the nonlinearity of quantization noise in ADC. Theoretical analysis and experimental results indicate that the optimum dithering signal can alleviate the nonlinear characteristics of quantization noise effectively, and reduce the effect...
With the development of the Internet of Things, data islands and information redundancy which caused by massive heterogeneous data has become a challenge of many commercial applications and scientific research hot spots. First, we proposed and designed a MapReduce data integration and data fusion architecture, then, we established a stable information processing environment and a unified information...
Focusing on the estimation of the hopping period of the frequency-hopping (FH) signals, this paper proposes a novel method based on the binary-sum in the frequency domain. First, the time-frequency (TF) spectrograph of the signal is obtained and transformed into a binary matrix. Then the sum in frequency domain is calculated and the hopping period is accurately estimated by spectrum analyzing. The...
A novel signal for waveform agile SAR is investigated, which is based on the variable rate of frequency jump burst (FJB) chirp waveform in fast time and slow time domain. We introduce the signal model for simulating waveform agile SAR Ground Moving Target Indication (GMTI) data and the method for image formation. And discussions and simulation experiments about the imaging performance and GMTI are...
This paper proposes an optimal receive algorithm for asymmetrically clipped optical OFDM (ACO-OFDM) based optical wireless communication systems with intensity modulation and direct detection (IM/DD). Conventional ACO-OFDM system only employs the information of odd subcarriers, and the information on even subcarriers is discarded. This paper presents a novel ACO-OFDM receiver, which exploits the anti-periodic...
In traditional bearing steel ball production, there is no automatic monitoring or control system. As a result, the forming defects and faults in the production process could not be found by the traditional manual detection method. In order to address this challenge, an on-line monitoring and control system for bearing steel ball production is proposed in this paper. The proposed system takes advantage...
The structure and performance of several modulation for atmospheric optical wireless communications was studied and was contrasted under an optical wireless communications model with atmospheric optical radiance scintillation channel Firstly, it discusses the conversion relations of symbol error rate and bit error rate from error theory perspectives analysis atmospheric optical wireless communications,...
To reduce the computational complexity and latency of Turbo decoding, a new decoding scheme is proposed. Firstly, the Max-Log-MAP algorithm is modified to improve performance while guarantee the calculation simplicity at the same time. Then, the parallel decoding scheme was introduced, and an improvement is made so that the two SISO decoders can work at the same time. The simulation results show that...
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