Title :
Investigation of Blanking Nonlinearity in OFDM Systems
Author :
Epple, Ulrich ; Shibli, Kamel ; Schnell, Michael
Author_Institution :
Inst. of Commun. & Navig., German Aerosp. Center (DLR), Wessling, Germany
Abstract :
In this paper, we analyze the influence of a blanking nonlinearity onto OFDM systems in detail. We will derive closed-form expressions for the signal degradation and the interference, which is introduced by the blanking nonlinearity. The theoretical results will be validated by simulations, which illustrate the detrimental blanking influence in a descriptive way. In addition it will be shown how the results affect an OFDM receiver and how the receiver can be adapted to the blanking nonlinearity. Simulation results confirm a gain of 3 dB at BER=1·10-3 for a 16QAM transmission, when adapting the receiver accordingly.
Keywords :
OFDM modulation; error statistics; quadrature amplitude modulation; radio receivers; radiofrequency interference; BER; OFDM receiver; OFDM system nonlinearity; QAM transmission; blanking nonlinearity; closed form expression; detrimental blanking; signal degradation; signal interference; Bit error rate; Blanking; Interference; OFDM; Receivers; Signal to noise ratio;
Conference_Titel :
Communications (ICC), 2011 IEEE International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-61284-232-5
Electronic_ISBN :
1550-3607
DOI :
10.1109/icc.2011.5962893
