This paper considers practically relevant aspects and advantages of pulse-shaping Orthogonal/Biorthogonal Frequency Division Multiplexing (OFDM/BFDM) systems. This paper analyzes the InterSymbol/InterCarrier Interference (ISI/ICI) in such systems when they operate over time-varying channels. Two methods for an ISI/ICI-minimizing pulse design are proposed, and efficient FFT-based modulator and demodulator implementations are presented. Simulations show that for fast time-varying channels, optimized BFDM systems can outperform conventional OFDM systems with respect to ISI/ICI.
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