Abstract
High peak-to-average power ratio (PAPR) reduction is one of the major challenges in orthogonal frequency division multiple access (OFDMA) systems since last decades. High PAPR increases the complexity of analogue-to-digital (A/D) and digital-to-analogue (D/A) convertors and also reduces the efficiency of RF highpower-amplifier (HPA). In this paper, we present a new Discrete-Hartley transform (DHT) precoding based interleaved-OFDMA uplink system for PAPR reduction in the upcoming 4G cellular networks. Extensive computer simulations have been performed to analyze the PAPR of the proposed system with root-raised-cosine (RRC) pulse shaping. We also compare simulation results of the proposed system with the conventional interleaved-OFDMA uplink systems and the Walsh-Hadamard transform (WHT) precoding based interleaved-OFDMA uplink systems. It is concluded from the computer simulations that the proposed system has low PAPR as compared to the conventional interleaved-OFDMA uplink systems and the WHT precoded interleaved-OFDMA uplink systems.
| Original language | English |
|---|---|
| Pages (from-to) | 685-694 |
| Number of pages | 10 |
| Journal | Journal of Engineering Science and Technology |
| Volume | 6 |
| Issue number | 6 |
| Publication status | Published - Dec 2011 |
| Externally published | Yes |
Keywords
- Discrete-hartley transform
- High-power-amplifie
- Interleaved-OFDMA
- Peak-to-average power ratio