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Generalized frequency division multiplexing (GFDM) is a promising candidatewaveform for next-generation wireless communication systems. However, GFDMchannel estimation is still challenging due to the inherent interference. Inthis paper, we formulate a pilot design framework with linear minimum meansquare error (LMMSE) channel estimation for GFDM, and propose a novel pilotdesign to achieve interference precancellation during pilot generation with thefixed transmit sample values at selected frequency bins. Numerical resultsdemonstrate that the proposed method reduces the channel estimation mean squareerror and the symbol error rate (SER) in high signal-to-noise ratio (SNR)regions, compared with the conventional methods.

Interference-Precancelled Pilot Design for LMMSE Channel Estimation of GFDM