Abstract
The use of multi-carrier techniques is a natural choice when regarding wireless systems with high bandwidths and for which the application environment exhibits severe multipath propagation. These techniques provide a way to cope with and benefit from the time-dispersive channel. This, however, comes at the cost of a higher sensitivity to imperfections in the analogue radio frequency front-end.
This paper illustrates the sensitivity of the most frequently used multi-carrier technique, i.e. ortho
gonal frequency division multiplexing (OFDM), to three of the main impairments: phase noise, IQ
imbalance and nonlinearities. Furthermore, it is shown that the use of digital signal processing can largely compensate the effects of these non-idealities, overcoming the disadvantages of the use of multi-carrier techniques.
Original language | English |
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Pages (from-to) | 112-123 |
Number of pages | 12 |
Journal | NERG : Tijdschrift van het Nederlands Elektronica- en Radiogenootschap |
Volume | 70 |
Issue number | 4 |
Publication status | Published - 2005 |