Title :
Estimation and compensation of IQ-imbalances in direct down
Author :
Pascht, A. ; Bitzer, T. ; Bohn, T. ; Endress, F.
Author_Institution :
Alcatel SEL AG, Stuttgart, Germany
Abstract :
A new method for the estimation and the compensation of IQ-imbalances in direct conversion receivers is presented. The considerations are based on a multi carrier receiver structure for universal mobile telecommunications systems (UMTS) base stations with a required image suppression of at least 60 dB. Therefore an error compensation in the digital domain is necessary. In laboratory measurements using a W-CDMA signal, the image suppression could be improved by 50.3 dB to a resulting value of 75.1 dB.
Keywords :
code division multiple access; modulation; multicast communication; radio receivers; statistical analysis; IQ imbalance compensation; IQ imbalance estimation; W-CDMA signal; direct conversion receivers; direct down; error compensation; image suppression; multicarrier receiver structure; universal mobile telecommunications systems base stations; 3G mobile communication; Base stations; Error analysis; Error compensation; Image converters; Laboratories; Mixers; Multiaccess communication; Radio frequency; Receivers;
Conference_Titel :
Electron Devices for Microwave and Optoelectronic Applications, 2003. EDMO 2003. The 11th IEEE International Symposium on
Print_ISBN :
0-7803-7904-7
DOI :
10.1109/EDMO.2003.1259995
