Method for spectral side lobe suppression in OFDM-based communication system
AssigneeDeutsches Zentrum für Luft- und Raumfahrt e. V.
InventorsMichael Schnell, Sinja Brandes
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Abstract
Of N subcarriers of an OFDM communication system or OFDM based multi-carrier communication system M subcarriers are used as cancellation subcarriers to achieve side lobe suppression of the OFDM transmission signal, where M<N. The M cancellation subcarriers are scaled with a generally complex weighting factor. Determining the weighting factor is performed in accordance with a suitable optimization criterion. Application in OFDM-based wireless and wired communication systems.
Claims24
A method for spectral side lobe suppression of the transmitter signal in wireless or wired orthogonal frequency-division multiplexing (OFDM) communication systems and in OFDM or OFDM-based multicarrier communication systems, comprising inserting determined subcarriers as cancellation subcarriers in the frequency domain of the communication system which carry no data information and contain instead of complex data symbols, special generally complex weighting factors and by the weighting factors being determined so that in accordance with an optimization criterion the spectral side lobes of the OFDM transmission signal are minimized.
Dependencies are inferred from the claim text.