Title :
On the performance of interference canceller based I/Q imbalance compensation
Author :
Valkama, Mikko ; Renfors, Markku ; Koivunen, Visa
Author_Institution :
Telecommun. Lab., Tampere Univ. of Technol., Finland
Abstract :
In quadrature receivers, unavoidable imbalances in the analog front-end between the I- and Q-branches result in finite and usually insufficient rejection of the image frequency band. This causes the image signal to appear as interference on top of the desired signal. Both analog and digital techniques to compensate the effects of I/Q imbalance have been presented in the literature. In this paper, we carry out a detailed performance analysis of the interference cancellation based imbalance compensation structure utilizing baseband digital signal processing. Also simulation results are provided for comparison. The results indicate that the interference canceller based solution can offer adequate performance for most communication applications
Keywords :
adaptive signal processing; interference suppression; least mean squares methods; radio receivers; radiofrequency interference; I/Q imbalance compensation; LMS adaptation; LMS algorithm; RLS algorithm; adaptive interference cancellation; additive noise; analog front-end; baseband digital signal processing; communication applications; correlation; digital interference cancellation; image frequency band rejection; image signal; interference canceller performance; performance analysis; quadrature receivers; simulation results; Attenuation; Baseband; Capacitors; Digital signal processing; Frequency; Interference cancellation; Laboratories; Performance analysis; Resistors; Signal design;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on
Conference_Location :
Istanbul
Print_ISBN :
0-7803-6293-4
DOI :
10.1109/ICASSP.2000.861129
