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Future wireless systems will require a paradigm shift in how they are networked, organized, configured, optimized, and recovered automatically based on their operating situations. With the emergence o...
Today, the National Science Foundation (NSF) announced 11 awards, totaling $12 million, to support activities aimed at enhancing the public's access to the radio frequency spectrum -- the part of the ...
Rendezvous is a fundamental process in Cognitive Radio Networks, through which a user establishes a link to communicate with a neighbor on a common channel. Most previous solutions use either a centra...
Rendezvous process plays an important role in constructing Cognitive Radio Networks (CRNs), through which a user establishes a link on a common licensed channel for communication with its neighbors.
Rendezvous process is the cornerstone to construct Cogni-tive Radio Networks (CRNs), through which a secondary user can establish a link for communication with its neigh-bor on a common channel. Altho...
Channel selection is a fundamental problem in Cognitive Radio Networks (CRNs). One basic channel assignment problem is ren-dezvous, which investigates how secondary users can establish a connec-tion b...
Rendezvous is a fundamental process in constructing Cog-nitive Radio Networks (CRNs), through which the user can communicate with its neighbors by establishing a link on some licensed frequency band (...
Cognitive radio networks (CRNs) have been pro-posed to solve the spectrum scarcity problem. One of their fundamental procedures is to construct a communication link on a common channel for the users, ...
Large deviations in the direction of arrival of ionospherically propagating radio signals from the Great Circle Path (GCP) have serious implications for the planning and operation of communications a...
In 2008, a radio receiver that works in very low frequency (VLF; 20-60 kHz) and LF (150-300 kHz) bands was developed by an Italian factory. The receiver can monitor 10 frequencies distributed in these...
Since GPS signals have very low received power levels (−130 dBm, or −160 dBW), their vulnerability to RF Interference (RFI) is a serious concern. This is particularly true for GPS-based sa...
There is tremendous market potential for location-based services (LBS), enabled by the rapid growth in the numbers of personal navigation devices and GPS-enabled mobile handsets. One of the major diff...
In this paper we introduce an efficient authentication mechanism especially designed for navigation systems that is based upon the Timed Efficient Stream Loss-Tolerant Authentication (TESLA) algorithm...
Adaptive antenna array processing is widely known to provide significant anti-interference capabilities within a Global Navigation Satellite Systems (GNSS) receiver. A main challenge in the quest for ...
The purpose of this graduate project is to design a real-time spectrum sensing system using software defined radio. The uniqueness of software defined radio is the concept of replacing many of the har...

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