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It is estimated that the demand for data rate in wireless networks increases by 40% up to 70% year upon year. This tremendous growth implies that within the next 10–15 years, the wireless networks may need to deliver as much as several hundreds of times the capacity as compared to the current levels. To reach this Terabit per seconds (Tbps) data rate a very broad bandwidth will be required. That is...
One of the main drawbacks of orthogonal frequency division multiplex modulation is its high peak-to-average power ratio (PAPR) which can induce poor power efficiency at high power amplifier. Tone reservation (TR) is the most popular PAPR mitigation technique that uses a set of reserved tones to design peak cancelling signal for PAPR reduction. Finding an effective peak cancelling for PAPR reduction...
This paper establishes a necessary condition that must be satisfied by the modulation waveforms of any generalized waveforms for multicarrier (GWMC) system with better peak-to-average power ratio (PAPR) than conventional orthogonal frequency division multiplexing (OFDM). GWMC systems include in particular all classical multicarrier modulation systems. As a consequence, we show that OFDM has the best...
Multicarrier modulation systems suffer from large peak-to-average power ratio (PAPR). Tone reservation is a popular technique for PAPR reduction. It consists in reserving a number of carriers to produce a redundant additive signal which reduces the peak power. There are several schemes to select the reserved carriers. In this paper, we propose a new selection method for adaptive tone reservation....
In the past few years, many research activities have concerned the Peak to Average Power Ratio (PAPR) especially in an Orthogonal Frequency Division Multiplexing (OFDM) context. Nevertheless, we have noticed that the PAPR definition is not always the same from one author to the other, depending on the paper context which leads to confusions and bad interpretations. That's why we propose in this article...
High Peak to Average Power Ratio (PAPR) is a parameter commonly associated to the multi-carrier signals like Orthogonal Frequency Division Multiplexing (OFDM). SoftWare Radio (SWR) is another example of multi-carrier signals and inherits high PAPR. Also, as SWR is an enabling technology for Cognitive Radio (CR) systems, therefore signals also demonstrate high power fluctuations in CR context. Upon...
High Peak to Average Power Ratio (PAPR) is a critical issue in multi-standard and multi-carrier communication systems. This problem can result in large performance degradation due to the non-linearity of the High Power Amplifier (HPA) or in low power efficiency. The Cognitive Radio (CR) is an efficient technology to meet the Green communications concept. In this paper, we study the PAPR reduction...
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