Title :
Performance impact of IQ mismatch in direct-conversion MIMO OFDM transceivers
Author :
Schenk, Tim C W ; Fledderus, Erik R. ; Smulders, Peter F M
Abstract :
This contribution analytically studies the influence of transmitter (TX) as well as receiver (RX) IQ mismatch on the performance of multiple-antenna OFDM systems based on direct-conversion. Analytical expressions are derived for the probability of error for MIMO OFDM systems in both nonfaded and Rayleigh faded channels. The results can be used to derive matching specifications for the TX- and RX-branches. It is concluded that in fading channels RX IQ imbalance is on average more destructive than TX IQ imbalance. Additionally, it is concluded that the addition of extra RX antennas is beneficial to reduce RX IQ imbalance dependence, but increases the TX IQ imbalance impact
Keywords :
MIMO communication; OFDM modulation; Rayleigh channels; antenna arrays; error statistics; transceivers; Rayleigh faded channels; direct-conversion MIMO OFDM transceivers; error probability; multiple-antenna OFDM systems; receiver IQ mismatch; transmitter IQ mismatch; Baseband; Error analysis; Fading; MIMO; Mirrors; OFDM; Performance analysis; Radio transmitters; System performance; Transceivers;
Conference_Titel :
Radio and Wireless Symposium, 2007 IEEE
Conference_Location :
Long Beach, CA
Print_ISBN :
1-4244-0445-2
Electronic_ISBN :
1-4244-0445-2
DOI :
10.1109/RWS.2007.351835
