Figure 5
From: Efficient Compensation of Transmitter and Receiver IQ Imbalance in OFDM Systems
Performance results for 64QAM OFDM system with transmitter and receiver IQ imbalance. D-FEQ scheme with predistortion based compensation is implemented. (a)–(d) The front-end filter impulse responses are 
and 
. (a), (b), and (d) Performance results with frequency independent amplitude imbalance of 
and phase imbalance of 
. (a) IQ imbalance estimation with iterative method, (b) IRR with transmitter/receiver IQ imbalance, (c) Mean IRR performance, (d) BER versus SNR for transmitter/receiver IQ imbalance