Title :
Low complexity turbo equalization in SCBT systems with transmitter IQ imbalance
Author :
Rui Liu ; Lv Ding ; Xiqi Gao
Author_Institution :
Nat. Commun. Res. Lab., Southeast Univ., Nanjing, China
Abstract :
In this paper, we study the turbo equalization in presence of transmitter (Tx) in-phase and quadrature-phase imbalance (IQI) for the cyclic prefix based single carrier block transmission (CP-SCBT) systems. Resort to the principle of widely linear estimation, we derive the soft input soft output (SISO) widely linear minimum mean-square error (WLMMSE) equalizer and its low complexity structure. Simulation shows that the proposed equalizer distinctly improves the performance of the turbo receiver in presence of Tx IQI.
Keywords :
equalisers; least mean squares methods; radio transmitters; SCBT systems; cyclic prefix; linear estimation; low complexity turbo equalization; quadrature-phase imbalance; single carrier block transmission systems; soft input soft output widely linear minimum mean-square error equalizer; transmitter IQ imbalance; turbo receiver; CP-SCBT; Turbo Equalization; Tx IQI; WLMMSE;
Conference_Titel :
Wireless, Mobile and Multimedia Networks (ICWMNN 2010), IET 3rd International Conference on
Conference_Location :
Beijing
DOI :
10.1049/cp.2010.0674
