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This paper investigates the bandwidth extension of phase reference and standard, so that a group of band-limited delay-unknown multisine signals can be used to realize an equivalently time-synchronized wideband phase reference. To minimize the PAPR, the multisines are designed with Schroeder-like phase spectra. The phases of overlapping components are made identical for alignment purpose. By adjusting...
A new technique known as Hybrid Tone Reservation (HTR) for Peak-to-Average Power Ratio (PAPR) reduction in OFDM systems has been proposed. It is shown that this new technique, based on the inclusion of the Guard Interval (GI) signal into the well-known Tone Reservation using Null-Subcarriers (TRNS) technique can significantly increase the PAPR reduction gain. In this paper, we propose to extend the...
The coexistence of broadband systems with currently deployed Professional Mobile Radio (PMR) communication systems like Public Protection and Disaster Relief (PPDR) has gained much deserved attention. In the recent literature, it has been suggested that LTE-like FBMC-OQAM system working on linear devices can coexist in PMR band, while conventional OFDM-based LTE system fails. When we take into account,...
Tone Reservation (TR) is a method used to reduce the Peak to Average Power Ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) systems. In this paper, we assess the importance of considering an improved model of the power amplifier (PA) to accurately evaluate the performance of TR method based on Conjugate-Gradient algorithm. Simulation results were carried out in the context of WLAN...
This paper investigates the issue of “predistorter blow-up,” i.e., uncontrolled peak expansion caused by the predistorter. To control the peak expansion, an extension of the multistep indirect learning architecture (MS-ILA) is proposed by adding a constraint that describes the allowed peak power of the predistortion signal. The resulting optimization problem is shown to be convex and an optimization...
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