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High altitude platform station (HAPS) is a new means of wireless communication, which operate in stratosphere whose altitude is about 20km. The wirless communication network of HAPS are researched Markov chain model is proposed in the HAPS wireless channel model. The performance of the wireless communication channel and channel model are analyzed. The simulation results shows that the performance...
Wireless sensor network(WSN) are wireless self-organizing network that can monitor, perceive and gather various messages from monitoring object, then process and send them to user. For the localization algorithm of wireless sensor network exists a big positioning error in wireless communication. Wireless sensor network communication system is built up. According to the anchor nodes and unknown nodes,...
High altitude platform station(HAPS) is a wireless repeater in the air. It can play a dominant role in observations, remote sensing and communication. The structure and composition of formation of HAPS are studied in this paper. The performance of the wireless communication link are researched. The simulation results shows that BER is relation to the bit each power and thermal noise power spectral...
In this paper we present the capacity enhancement investigations of passive repeater for the tri-polarized MIMO channel. The tri-polarized MIMO channel are measured in different indoor environments such as corridor, conference room and anechoic chamber. The measurement results show that it has a great capacity enhancement depends on different repeater scenarios including the sizes, heights, angles...
Received signal strength (RSS) based location fingerprinting is a powerful wireless positioning technique. It estimates the target location by consulting a preliminary database and searching for the best matched RSS fingerprints. The construction and maintenance of a sufficient fingerprint database could be laborious and problematic. This paper proposes a new approach that utilizes the Kriging spatial...
Miniaturized surgical robotic system presents promising trend for reducing invasiveness during operation. However, cables used for power and communication may affect its performance. In this paper we chose Zigbee wireless communication as a means to replace communication cables for miniaturized surgical robot. Nevertheless, time delay caused by wireless communication presents a new challenge to performance...
A kind of design for storage testing system based on MSP430F133 is represented, on this basis", "the software and hardware design of this system is introduced and discussed in detail. In a word", "it meets the requirement of low power consumption and long time to complete the storage and testing tasks.
The comparison between direct detection and coherent detection for circular polarization shift keying modulation scheme is analyzed for wireless optical communication in turbulence channel. The coherent detection had a better performance than direct detection.
For monitoring burst events in reactive wireless sensor networks (WSNs),an novel energy-efficient dynamic voting cluster (EE-DVC) algorithm is proposed. EE-DVC has three obvious features: Firstly, it adopts virtual grid ideas to divide each cluster into MtimesN square area and select a working node in each grid to reduce redundant information and save energy. Secondly, cluster head is dynamic voted...
One of the key problems for wireless sensor networks (WSNs) is the design of energy-efficient routing algorithm, because sensor energy is limited. The energy-efficiency routing algorithm has a strong impact on the network performance. In this paper, we present an energy-efficient minimum routing algorithm (EEMR) of wireless sensor networks. EEMR improves energy utility by changing the activity of...
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