Error Vector Magnitude Optimization for OFDM Systems With a Deterministic Peak-to-Average Power Ratio Constraint

2009 ◽  
Vol 3 (3) ◽  
pp. 418-429 ◽  
Author(s):  
Qijia Liu ◽  
Robert J. Baxley ◽  
Xiaoli Ma ◽  
G. Tong Zhou
Keyword(s):  
Average Power ◽  
Power Ratio ◽  
Ofdm Systems ◽  
Error Vector Magnitude ◽  
Error Vector ◽  
Vector Magnitude

Simulation on PAPR Suppression Algorithm for Multicarrier System

2014 ◽  
Vol 596 ◽  
pp. 794-798
Author(s):  
Rui Zhang ◽  
Zhi Bin Zeng
Keyword(s):  
Power Amplifier ◽  
Power Efficiency ◽  
Average Power ◽  
Power Ratio ◽  
Error Vector Magnitude ◽  
Crest Factor ◽  
Multicarrier System ◽  
Crest Factor Reduction ◽  
Small Distortion ◽  
Vector Magnitude

The main disadvantage of multicarrier system is the high peak-to-average power ratio which can easily result in significant cut-the-top distortion of power amplifier. However, the power efficiency of power amplifier will be reduced by power back-off technology. Therefore, crest factor reduction is important in reducing the peak-to-average power ratio of multicarrier system and improving the efficiency of power amplifier. The peak-to-average power ratio can be effectively reduced with small distortion by the algorithm of crest factor reduction based on peak cancellation. And the performance of peak-to-average power ratio is better with the same error vector magnitude.

scholarly journals Linealización mediante Predistorsión Digital de un Sistema Radio sobre Fibra de Doble Banda

2017 ◽  
Vol 5 ◽  
Author(s):  
Carlos Mateo Perez ◽  
Nieves Pérez ◽  
Paloma García ◽  
Pedro L. Carro ◽  
Jesús De Mingo ◽  
...  
Keyword(s):  
Radio Over Fiber ◽  
Power Ratio ◽  
Error Vector Magnitude ◽  
Channel Power ◽  
Error Vector ◽  
Adjacent Channel ◽  
Vector Magnitude ◽  
Adjacent Channel Power Ratio

En este artículo se propone la linealización de un sistema Radio-over-Fiber (RoF) de doble banda  mediante predistorsión digital. Los resultados han sido evaluados experimentalmente con señales LTE en un sistema RoF, obteniendo mejores resultados que con el predistorsionador clásico de una banda en términos de Adjacent Channel Power Ratio (ACPR), pérdidas de potencia y Error Vector Magnitude (EVM). 

scholarly journals Interleaving Technique Implementation to Reduce PAPR of OFDM Signal in Presence of Nonlinear Amplification with Memory Effects

2018 ◽  
Vol 3 ◽  
pp. 14-22 ◽  
Author(s):  
Younes Aimer ◽  
Boubakar Seddik Bouazza ◽  
Smail Bachir ◽  
Claude Duvanaud
Keyword(s):  
Side Information ◽  
Average Power ◽  
Papr Reduction ◽  
Ofdm Systems ◽  
Error Vector Magnitude ◽  
Efficient Manner ◽  
Amplifier Model ◽  
Ofdm Signal ◽  
With Memory ◽  
Vector Magnitude

In OFDM systems, peak-to-average power ratio (PAPR) reduction of the signal is one of the main challenges that need to be overcome in order to use the transmitter in an efficient manner. As one of attractive techniques, interleaving can be used in PAPR reduction for multicarrier signals without spectrum distortion. In this paper, the authors propose to extend the possibilities of interleaving to improve PAPR reduction, to use a new coding of interleaver keys at the transmitter and a robust decoding procedure at the receiver. In order not to degrade the data rate, the use of null subcarriers to transmit side information to the receiver is proposed and evaluated. Simulation results in the context of the WLAN 802.11a standard in the presence of a nonlinear power amplifier model with memory, show a reduction of PAPR of approximately 5.2 dB, and an improvement of bit error rate and error vector magnitude of about 2 decades and 4% respectively, while respecting the spectral mask specification.

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