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This paper presents a performance analysis of an ultra wideband (UWB) communication system based on Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) in the presence of narrowband interference. Although OFDM-based systems are known to be capable of withstanding some level of narrowband interference, mitigation techniques may have to be used when interference levels are high. Furthermore,...
This work presents two approaches to the problem of automatic modulation classification in cognitive radios. The first approach deals with classifying distinct QAM modulations. The proposed solution consists of a SVM classifier that uses as input parameters the distance between the received symbol and its nearest neighbor in each constellation. The results obtained by the proposed classifier is compared...
Impulse ultra wideband (UWB) communications promises a number of potential benefits for use in wireless sensor networks-particularly in forest environments where it can provide robust operation along with the ability to combine communications with precision position location. Additionally, MIMO communications for UWB provides the ability to take advantage of the rich multipath diversity inherent to...
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