N-continuous OFDM: System Optimization and Performance Analysis

摘要: N-continuous orthogonal frequency division multiplexing (NC-OFDM) is a promising technique to achieve significant sidelobe suppression of baseband OFDM signals. However, the high complexity limits its application. Based on conventional NC-OFDM, in this paper, new technique, called time-domain (TD-NC-OFDM), proposed transfer original frequency-domain processing time domain, by linear combination novel basis set smooth consecutive symbols and their high-order derivatives. We prove that TD-NC-OFDM an equivalent one while consuming much lower complexity. Furthermore, via structure, closed-form spectral expression NC-OFDM signals derived compact upper bound decaying derived. This paper also investigates impact received signal-to- interference-plus-noise ratio (SINR) provides analytical expression. Theoretical analyses simulation results show can prohibitively suppress with Index Terms—Orthogonal (OFDM); suppression; (NC-OFDM); continuity; complexity; signal-to-interference-plus-noise (SINR).