tailieunhanh - Báo cáo hóa học: " Research Article Amplitude PDF Analysis of OFDM Signal Using Probabilistic PAPR Reduction Method"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Amplitude PDF Analysis of OFDM Signal Using Probabilistic PAPR Reduction Method | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 983915 7 pages doi 2011 983915 Research Article Amplitude PDF Analysis of OFDM Signal Using Probabilistic PAPR Reduction Method Hyunseuk Yoo Frederic Guilloud and Ramesh Pyndiah Department of Signal and Communications Telecom Bretagne Technopole Brest Iroise CS 83818 29238 Brest cedex 3 France Correspondence should be addressed to Hyunseuk Yoo hyunseuki@ Received 24 June 2010 Revised 2 December 2010 Accepted 19 January 2011 Academic Editor Marc Moonen Copyright 2011 Hyunseuk Yoo et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. To reduce the peak-to-average power ratio PAPR of an orthogonal frequency division multiplexing OFDM modulation scheme one class of methods is to generate several OFDM symbols candidates carrying the same information and to select for transmission the one having the lowest PAPR. We derive a theoretical amplitude probability density function PDF of the selected OFDM symbol using order statistics. This amplitude PDF enables one to derive the signal-to-noise-plus-distortion ratio SNDR as a function of the number of candidates. Based on the SNDR derivation theoretical error performance and statistical channel capacity are provided for this class of methods. The results match the simulations and make the system design easier. 1. Introduction Orthogonal frequency division multiplexing OFDM is a multicarrier multiplexing technique where data is transmitted through several parallel frequency subchannels at a lower rate. It has been popularly standardized in many wireless applications such as Digital Video Broadcasting DVB Digital Audio Broadcasting DAB High Performance Wireless Local Area Network HIPERLAN IEEE WiFi and IEEE WiMAX . It has also