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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Shinotsuka, M. Xiaoli Ma Zhou, G.T. |
| Copyright Year | 2010 |
| Description | Author affiliation: School of ECE, Georgia Institute of Technology (Shinotsuka, M.; Xiaoli Ma; Zhou, G.T.) |
| Abstract | Orthogonal Frequency Division Multiplexing (OFDM) has been widely adopted in many applications and standards for a number of benefits including high efficiency and immunity against the frequency-selective channel. Power loading, which is a technique that allocates different amount of power for each subcarrier, further enhances the system performance by maximizing mutual information, reducing Bit Error Rate (BER) or improving other aspects of the communication system. OFDM, however, suffers from high Peak-to-Average Power Ratio (PAR) due to its wide dynamic range of time-domain waveforms. This makes OFDM symbols be affected by nonlinearity resides at the power amplifier (PA), causing the power efficiency to decrease and symbols to be distorted. The effect of power loading techniques over peak power limited OFDM systems has not been well studied. In this paper, some existing power loading techniques are applied to OFDM system, and performance is compared from four different aspects: PAR, Error Vector Magnitude (EVM), spectral characteristics, and Symbol Error Rate (SER). The paper concludes with the answer to the question of whether power loading hurts or helps if it is available for OFDM system. |
| Starting Page | 1632 |
| Ending Page | 1637 |
| File Size | 1389395 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781424481781 |
| ISSN | 21557586 |
| e-ISBN | 9781424481804 |
| DOI | 10.1109/MILCOM.2010.5680214 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-10-31 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Loading Bit error rate Peak to average power ratio Signal to noise ratio Frequency domain analysis Resource management peak-to-average power ratio (PAR) Orthogonal frequnecy divison multiplexing (OFDM) power loading |
| Content Type | Text |
| Resource Type | Article |
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