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The principal objective of cognitive radio (CR) networks is to configure and share dynamically the spectrum resources in order to avoid user interference and congestion. This goal is limited by the effect of errors synchronization between primary and secondary users. In this paper, we study the impact of the asynchronism on the cyclic prefix-based orthogonal frequency division multiplexing modulation...
In this paper, we introduce the impact of non-linear high-power amplifier (NL HPA) on the bit error rate (BER) and on the spectrum efficiency of multicarrier techniques. A comparison between two multicarrier transmission techniques based on cognitive radio (CR) is presented: the classical orthogonal frequency division multiplexing (OFDM), based on cyclic prefix (CP), and the filter bank-based multicarrier...
In this paper, we investigate the impact of the asynchronismon the performance of a Cognitive Radio (CR) network, using the underlay paradigm. We are also comparing this effectdepending on which modulation technique we are using. Weprovide a new the theoretical aspect of interference analysis in thecontext of orthogonal frequency division multiplexing (OFDM) and the Filter Bank Multicarrier (FBMC)...
In the last years, Ultra Wideband (UWB) systems have received growing interest for their low-power consumption and low-complexity implementation. Because of the ultra-short emitted waveforms nature, timing acquisition presents a most important challenge for achieving good performance. In this paper, in order to address this task and to achieve this goal, we design and test a novel timing acquisition...
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