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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Rushdi, A. Tuqan, J. |
| Copyright Year | 2007 |
| Description | Author affiliation: Univ. of California, Davis (Rushdi, A.; Tuqan, J.) |
| Abstract | A key building block in any OFDM transceiver is the Fast Fourier Transform (FFT) and its inverse. A number of researchers have recently proposed the use of the discrete cosine transform (DCT) and the discrete sine transform (DST), and their inverses as alternative modulating/demodulating bases to improve the BER performance of OFDM schemes while maintaining a low implementation cost. In this paper, we consider the open problem of reducing the peak-to-average power ratio (PAPR) in OFDM systems that deploy these trigonometric transforms. In specific, we show that similar to the FFT case, the complex envelope of a bandlimited DCT/DST- OFDM signal has a chi-square distribution with one degree of freedom and hence converges weakly to a Gaussian random process as the number of sub-carriers becomes large. Using this result, we then derive closed form expressions for the complementary cumulative distribution functions (CCDF) of each system and show that OFDM systems with trigonometric transforms provide higher PAPR reduction than the standard FFT-based system. Simulation results that compare the CCDFs of the different transforms using the partial transmit sequences (PTS) technique confirm our theoretical findings. |
| Starting Page | 1747 |
| Ending Page | 1751 |
| File Size | 2302184 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781424421091 |
| ISSN | 10586393 |
| DOI | 10.1109/ACSSC.2007.4487532 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-11-04 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Peak to average power ratio Discrete cosine transforms Discrete transforms Partial transmit sequences Transceivers Fast Fourier transforms OFDM modulation Bit error rate Costs Signal processing |
| Content Type | Text |
| Resource Type | Article |
| Subject | Signal Processing Computer Networks and Communications |
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