Abstract: A low data-rate communication technique using linear step frequency modulated (LSFM) signal is presented. When the carrier frequency offset (CFO) between the transmitter and the receiver is significant comparingto the symbol rate, the techniques using normal signaling waveforms with matched filtering become infeasible. In this scenario, wideband chirp (linear FM) signal is feasible because of its favorable characteristicsin ambiguity function. However the fully digital implementation of the matched filter for the chirp signal is not economic. In this paper, we propose the use of a linear step FM signal, which has similar characteristics as a chirp signal, and an efficient hardware structure in the digital implementation of the corresponding matched filter.

• Publication Date: 08-Jun-2014
• DOI: 10.15224/978-1-63248-021-7-88
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Abstract: In this research paper, Dynamic Source Routing were under certain studies from different aspects including a comparison between DSR performance according to different environments and with other protocols. DSR is a well-known ad hoc protocol, which is restricted to small networks. A new developed Agent used to enhance the performance of the DSR. A developed shadow Agent has made a new step forward to solve the problem of routing maintenance. This developed Agent has the ability to control the routing in the network which normally holding a routing table to increase the utilization of the routing protocol. The developed shadow Agent has played a major role to handle the expected dis-connectivity that may happen when the Agent changes its location.

• Publication Date: 08-Jun-2014
• DOI: 10.15224/978-1-63248-021-7-89
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• Downloads: 0