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Table 1 Characters of five example PA envelopes

From: The sensitivity of modulation fidelity on PA envelope variation in OFDM transmitter systems

PA Envelope characters PLA(%)
L 0 DNOP-CISP = 0 dB = DSP-CISP 100
L 1 DNOP-CISP = 3 dB = DSP-CISP 75
L 2 3 dB = DNOP-CISP < DSP-CISP = 6 dB 50
L 3 6 dB = DNOP-CISP > DSP-CISP = 3 dB 50
L 4 DNOP-CISP = 6 dB = DSP-CISP 0