Imbalance-compensated direct down conversion receiver for UMTS base stations

In this work, a new method for the estimation and the compensation of in-phase quadrature-imbalances in direct down conversion receivers is presented. The considerations are based on a receiver structure that is developed for the simultaneous down conversion of up to four neighboring carriers in uni...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2004-08, Vol.14 (8), p.395-397
Main Authors: Bitzer, T., Endress, F., Pascht, A., Schreiter, M.
Format: Article
Language:English
Subjects:
3G mobile communication
Analogue
Applied sciences
Base stations
Broadband amplifiers
Compensation
Conversion
Equipments and installations
Error analysis
Exact sciences and technology
Frequency
Image converters
Low-noise amplifiers
Microwaves
Mixers
Mobile radiocommunication systems
Multiaccess communication
Radiocommunications
Receivers
Stations
Telecommunications
Telecommunications and information theory
Transmitters. Receivers
Wideband
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Description
Summary:In this work, a new method for the estimation and the compensation of in-phase quadrature-imbalances in direct down conversion receivers is presented. The considerations are based on a receiver structure that is developed for the simultaneous down conversion of up to four neighboring carriers in universal mobile telecommunications system base stations. The image suppression of the system must achieve at least 60 dB. This requirement is not fulfilled by the analogue part and hence, an error estimation and compensation in the digital domain is necessary. In laboratory measurements using a wideband code-division multiple-access signal, the image suppression of the complete set-up including the analogue parts could be improved by 34 dB.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2004.832627