A new Discrete Hartley transform precoding based interleaved-OFDMA uplink system with reduced PAPR for 4G cellular networks

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. © school of engineering,taylor's university.