Martha C. Paredes Paredes

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Amain drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems is that they suffer from a high Peak-to-Average Power Ratio (PAPR) at the transmitted signal. We propose three different architectures of a PAPR reduction technique combining pilot symbols with constellation extension. These architectures make use of a metric-based amplitude(More)
The high Peak-to-Average Power Ratio (PAPR) is a main drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems. We propose a twostep technique to reduce the PAPR consisting of a metricbased constellation extension method, such as Simple Amplitude Predistortion (SAP) algorithm, aided by Orthogonal Pilot Sequences (OPS) in a previous step, where(More)
Vehicular Ad Hoc Networks (VANETs) are wireless networks that emerged thanks to advances in wireless technologies and in the automotive industry. Orthogonal Division Multiplexing (OFDM) has been adopted as a candidate for IEEE 802.11p standard due to its advantages. However, one of the most serious issues is the high Peak-to-Average Power Ratio (PAPR) of(More)
Orthogonal Frequency Division Multiplexing (OFDM) is widely used in many digital communication systems due to its advantages such us high bit rate, strong immunity to multipath and high spectral efficiency but it suffers a high Peak-to-Average Power Ratio (PAPR) at the transmitted signal. It is very important to deal with PAPR reduction in OFDM systems to(More)
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