Figure 6
From: Efficient Compensation of Transmitter and Receiver IQ Imbalance in OFDM Systems
Performance results for 16QAM OFDM system with frequency independent amplitude imbalance of 
and phase imbalance of 
. The front-end filter impulse responses are 
. In the case of both transmitter/receiver IQ imbalance, D-FEQ with predistortion-based compensation scheme is implemented. (a) BER versus channel tap length at 20 dB SNR. (b) BER versus SNR performance results. (a) BER versus channel tap length at 20 dB SNR, (b) BER versus SNR for receiver IQ imbalance