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Author Valkama, Mikko ♦ Renfors, Markku ♦ Koivunen, Visa
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Blind Source Separation ♦ Imbalance Compensation ♦ Symbol Timing Error ♦ Desired Channel Signal ♦ 50-100 Db ♦ Compensation Structure ♦ Obtained Result ♦ Major Concern ♦ Image Signal ♦ Proper Selection ♦ Communication Receiver ♦ Computer Simulation ♦ Image Frequency Band ♦ Easi Algorithm ♦ Insufficient Rejection
Description In I/Q processing receivers, matching the amplitudes and phases of the I- and Q-branches is of major concern. In practise, matching can never be perfect in the analog front-end which results in insufficient rejection of the image frequency band. As a consequence, the desired channel signal is interfered by up to 50-100 dB stronger image signal and some kind of imbalance compensation is needed. In this paper, the interference due to imbalancing is modelled by instantaneous linear mixing model and the compensation is carried out by a blind source separation (BSS) method. The effects of symbol timing errors on EASI algorithm based compensation structure are analyzed both analytically and through computer simulations. The obtained results indicate that timing errors degrade the performance of the proposed method. The effects of timing errors can, however, be reduced with proper selection of non-linearity in the EASI algorithm. 1.
in Proc. International Conference on Independent Component Analysis and Blind Signal Separation
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2000-01-01