PSAM adaptive modulation OFDM system model

The FDD PSAM adaptive modulation OFDM system model is shown in Figure 1. In order to simplify the analysis, channel coding and interleaving are not considered in the figure.

Figure 1 PSAM adaptive modulation OFDM system model

1.1 Pilot symbols assist modulation at the transmitting end, and periodically insert two-dimensional pilot symbols of time and frequency into the transmitted signal. At the receiving end, based on pair guidance

Spectrum efficiency of PSAM adaptive modulation OFDM

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