Computational complexity reduction of NCSP-OFDM receiver for sidelobe suppression

Abstract

N-continuous symbol padding orthogonal frequency division multiplexing (NCSP-OFDM) is a modulation technique for sidelobe suppression, which adds the correction symbol only into the guard interval to enable the seamless connection of OFDM symbols. NCSP-OFDM requires the calculation of an inverse matrix per channel estimation, and so its computational complexity is large. This paper proposes a simple method for the calculation of the inverse matrix. Numerical experiments demonstrate that the proposed method does not affect the error rate performance and effectively reduces the computational complexity.