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Metric based symbol predistortion for peak power reduction of space frequency coded OFDM systems

Ferdosizadeh Naeiny, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1109/TCE.2010.5606308
  3. Publisher: 2010
  4. Abstract:
  5. In this paper, a metric based symbol predistortion method is introduced for Peak to Average Power Ratio (PAPR) reduction of the Space Frequency Block Coded (SFBC) Orthogonal Frequency Division Multiplexing (OFDM) systems with two transmitter antennas. In the proposed method, a metric is defined which shows the contribution of each frequency domain symbol to the time domain samples with high amplitude at both antennas. Then, the symbols with the highest metric values are chosen and predistorted such that the peak powers are reduced while the SFBC relationship between two antennas holds constant. Three variants of this method will be introduced. Then, this technique is extended to the general SFBC systems with an arbitrary number of antennas and SFBC structures. Simulation results show that the proposed methods converge when a different number of transmitter antennas and different modulation techniques are used. However, the best performance is achieved in the case of two transmitter antennas with QPSK modulation
  6. Keywords:
  7. Orthogonal Frequency Division Multiplexing (OFDM) ; Peak to Average Power Ratio (PAPR) ; Space Frequency Block Coding (SFBC) ; Arbitrary number ; Coded OFDM ; Frequency domain symbols ; High amplitudes ; Metric values ; Modulation techniques ; Orthogonal frequency division multiplexing systems ; Peak power ; Peak power reduction ; Peak-to-average power ratio reductions ; Pre-distortion ; Predistortion method ; QPSK modulation ; Simulation result ; Space frequency ; Time domain ; Transmitter antennas ; Antennas ; Frequency allocation ; Multiplexing ; Orthogonal functions ; Signal distortion ; Telecommunication systems ; Transmitters ; Time domain analysis
  8. Source: IEEE Transactions on Consumer Electronics ; Volume 56, Issue 3 , October , 2010 , Pages 1643-1651 ; 00983063 (ISSN)
  9. URL: http://ieeexplore.ieee.org/document/5606308/?reload=true