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Interference alignment (IA) can remarkably improve the spectral efficiency of dense small cell networks (SCNs) underlaying a macrocell, but its feasibility condition and implementation complexity are restricted by the number of small cell equipments (SUEs). Moreover, the SUEs performing IA may have unsatisfactory quality of service (QoS) requirements as IA only eliminates interference while neglecting...
The interference to a receiver of a second generation Beidou satellite system from ultra-wide band (UWB) impulse radio (IR) systems is analyzed. Both the power spectral density (PSD) of the Beidou satellite signal and the PSD of typical UWB-IR signals, such as UWB radar and pulse amplitude modulation (PAM) data signals, are given. The radio frequency (RF) front-end of the Beidou receiver is considered...
This paper considers the influence of multi-user interference (MUI) on an impulse radio ultra-wideband (UWB) communication system. Binary pulse position modulation is employed with time hopping (TH) for multiple access communications. The users are assumed to transmit asynchronously. A technique to reduce the MUI is presented. It is shown that this approach is effective for UWB systems in both additive...
An important component of ad hoc network is transmitter power control, which contributes to minimize the interference, increase the wireless network capacity, and extend the battery life of active nodes in the wireless network. It ensures that these transmission at the minimum power level is necessary to achieve a specified quality of service (QoS) defined by the SINR (Signal to Interference Noise...
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