Figure 4From: The sensitivity of modulation fidelity on PA envelope variation in OFDM transmitter systemsThe constellation diagrams of L 0 and L 4 . An 16QAM IEEE 802.11a OFDM signal is applied. (a,b) Output diagrams of L0 at operating points of IBO 6 and -2 dB, respectively. (c,d) L4 as the same configuration applied.Back to article page