The chirp-z transform combined with the least square method is first used to address the issue of NBI causing the spectrum leakage effect after OFDM demodulation. Furthermore, based on the OFDM ...

3.2 OFDM modulation and demodulation An OFDM symbol is a mixed-signal of multiple modulated subcarriers, which could be modulated by PSK and QAM. The OFDM transmitter transforms the bit-stream ...

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