Abstract
The sensor networks are characterized by tiny, inexpensive, and advanced communication technology. However, wireless ad-hoc sensor networks (WASNs) have some issues such as the limited amount of energy, multipath fading, and some other issues when they applied in disaster situations. For reducing power consumption, we show mathematical analysis of energy saving, and enhanced error symbol probability. The simulation results prove our analysis. As for the multipath fading, we also show the mathematical analysis of fading channel characteristics and channel model, as well as how to mitigate the multipath fading by modulation and diversity techniques. From the simulation results, we prove the proposed system with amplify-and-forward (AF) relaying can achieve a 2.5 dB performance gain the BER 10-4 whereas the achievable improvement is almost a 4 dB at the BER 10-5 when using maximal ratio combining.
Highlights
Wireless sensor network usually consists of large number of sensor nodes with self-organized manner
It is a challenging task to design energy-efficient data gathering protocols for wireless sensor networks
Mobile ad-hoc network can be defined as a wireless communication in which terminals that not in direct transmission of each other need other terminals as a relay to forward data
Summary
Wireless sensor network usually consists of large number of sensor nodes with self-organized manner. In the past few years, a lot of wireless connectivity standards and technologies are appeared, which enable users to connect to a large group of computing and telecommunications devices by a simple way[3] These types of technologies provide opportunities for speedy ad-hoc connections and the opportunity of automatic associations between devices. A mobile user who desires to communicate in situation there is no network infrastructure available, such as firefighters require connection to an ambulance on the way to an emergency site. In such cases, a collection of mobile ad-hoc with wireless network interfaces could form a momentary network without the assistance of any established network infrastructure or centralized administration. The user mobility allows users to switch between devices, move sessions while still getting the same personalized services
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