نتایج جستجو برای: full duplex
تعداد نتایج: 312136 فیلتر نتایج به سال:
---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Here, in this paper spectrum sensing method is proposed for full duplex cognitive radio. Spectrum sensing performs essential part in spectrum allocation. Cognitive radio is the very useful option now a days, as the traffic of user increase and less...
In this paper, we consider the achievable sum secrecy rate in full-duplex wiretap channel in the presence of an eavesdropper and imperfect channel state information (CSI). We assume that the users participating in full-duplex communication and the eavesdropper have single antenna each. The users have individual transmit power constraints. They also transmit jamming signals to improve the secrec...
Problem of opportunistic use of the unlicensed 5GHz band for LTE carrier aggregation (LTE unlicensed) is studied from the point-of-view of cognitive full-duplex transceivers. In this paper, an initial study of the impact of selfinterference on the performance of cyclostationary spectrum sensing algorithm is given, in case where a full-duplex transceiver tries opportunistically use parts of the ...
Relay cooperation can enhance coverage, throughput, and reliability of wireless communication systems, thus attracting intense research interest in the past decade. However, most of them focused on half-duplex relay systems, which encounter loss of resource efficiency. With the progress of self-interference cancellation technologies, full-duplex relay systems come into sight. In this paper, out...
We present a novel switched full-duplex LAN architecture which can greatly simplify the cabling requirements in areas that must support high port densities and/or are subject to frequent changes. Instead of providing a separate cable to connect each host to a dedicated port on a monolithic switch behind the wall, we emulate the shared bus topology from the early days of Ethernet by daisy-chaini...
A number of specific duplex DNA sequences which correspond to varying lengths of the lactose operator region have been synthesized by a combination of chemical and enzymatic methods. Repressor binding studies on these synthetic duplex operator molecules show that all the nucleotides essential for full lactose operator-repressor interactions are included in a 17-nucleotide-long duplex DNA that c...
In the last years, the advancements in signal processing and integrated circuits technology allowed several research groups to develop working prototypes of in–band full–duplex wireless systems. The introduction of such a revolutionary concept is promising in terms of increasing network performance, but at the same time poses several new challenges, especially at the MAC layer. Consequently, in...
Full-duplex wireless communication has the potential to double the capacity of wireless networks by reducing the band occupancy of transmissions. However, a full-duplex capability cannot always reduce the band occupancy because the real traffic is not fully buffered. Buffering time while waiting for a packet to arrive at an opposite node is expected to reduce the band occupancy. In this study, ...
Recent work has characterized the sum capacity of time-varying/frequency-selective wireless interference networks and X networks within o(log(SNR)), i.e., with an accuracy approaching 100% at high SNR (signal to noise power ratio). In this paper, we seek similar capacity characterizations for wireless networks with relays, feedback, full duplex operation, and transmitter/receiver cooperation th...
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