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Map matching is an important part of map routing in modern transportation applications. In the map matching process, the effect of two main components, i.e. (i) the features of road networks, and (ii) the design aspects of geolocation services, is still not well understood. In this paper, using a combination of probabilistic analysis and simulations we study the effects of the above factors on the...
NS2 is an event-driven, object-oriented simulation tool to simulate and analyze dynamic nature of communication networks; it is also a powerful tool to develop new protocols and functions. NS-2 is an open source and very popular network simulation tool. It provides support for OSI or TCP/IP protocols stack and many standard routing and application protocols for wire and wireless networks. In NS2,...
This paper evaluates the performance of differentially encoded quadrature phase shift keying (DQPSK) modulated orthogonal frequency division multiplexing (OFDM) for underwater acoustic (UWA) communication. The combination of OFDM and the non-coherent detection scheme maintains the receiver design simple, reliable and spectrally efficient. QPSK helps achieve higher data rate as two bits are sent over...
Underwater acoustic communication is essential in applications like remote control in the offshore oil industry, pollution monitoring in environmental systems, collection of scientific data recorded at ocean-bottom stations, disaster detection and early warning and underwater surveillance. Research on underwater wireless communication techniques plays a vital role in further exploring oceans and other...
This paper investigates the performance of spread orthogonal frequency division multiplexing (SOFDM) with space frequency block coding (SFBC) technique for underwater acoustic communication through simulation and semi realistic experimentation. Performance of Walsh-Hadamard code spread OFDM (WHSOFDM) and carrier interferometry code spread (CISOFDM) has been evaluated for underwater acoustic communication...
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