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In this paper, we give an expression of power spectral density (PSD) of all orthogonal frequency division multiplex (OFDM)-type signals. According to the analysis results, the different PSDs are compared between the original classic OFDM signals and the orthogonal frequency division multiplex/offset QAM (OFDM/OQAM) signals. With the consideration of the clipping peak-to-average power ratio (PAPR)...
The existed preamble structure for orthogonal frequency division multiplex/offset QAM (OFDM/OQAM) system requires two zero-value guard symbols to guarantee ISI and ICI avoidance (equivalent to 3/2 complex value symbols in OFDM with cyclic prefix system), which leads to OFDM/OQAM system with low spectrum efficiency. In this paper, we shorten the preamble with 1 zero-value guard symbol to improve the...
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