Abstract
The implementation of OFDM transmitters typically consists of a discrete DFT matrix and a digital-to-analog (DAC) converter. Many existing results on the analysis of OFDM systems, e.g., spectral roll-off, are based on a convenient analog representation. In this paper, we show that the analog representation and the DFT-based OFDM transmitters are equivalent only in special cases. Using the analog system to analyze the DFT-based OFDM system may not be valid if there is no equivalent analog representation.
Original language | American English |
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Pages (from-to) | 2450-2453 |
Number of pages | 4 |
Journal | IEEE Transactions on Signal Processing |
Volume | 51 |
Issue number | 9 |
DOIs | |
State | Published - 1 Sep 2003 |
Keywords
- Analog representation
- DFT-based implementation
- OFDM
- Pulse shaping
- Window