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Window Design for Non-Orthogonal Interference Reduction in OFDM Receivers

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6 Author(s)
Patrick Nickel ; Institute for Mobile Communications, University of Erlangen-Nuremberg, Cauerstr. 7, 91058 Erlangen, Germany, Email: ; Wolfgang Gerstacker ; Christof Jonietz ; Gerd Kilian
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For conventional orthogonal frequency-division multiplexing (OFDM) systems, the guard interval is disregarded in the receiver and rectangular shaped windows are used implicitly due to the discrete Fourier transform (DFT). We consider a Nyquist-shaped window in the receiver, so that the transmit signal does not need to be modified, and optimize the window shape in order to suppress interference from non-orthogonal single carrier interferer signals. For the window coefficients, a closed form solution is derived. This type of interference usually occurs in OFDM radio systems like digital radio mondiale (DRM) that are operating in low frequency bands. (Disturbance is given for instance by harmonics of switched-mode power supplies)

Published in:

2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications

Date of Conference:

2-5 July 2006