Abstract
Dummy sequence insertion (DSI) and partial transmit sequence (PTS) are two existing distortionless peak to average power ratio (PAPR) reduction techniques that have been proposed for orthogonal frequency division multiplexing (OFDM) systems. Both DSI and PTS have drawbacks. In DSI, increasing the number of dummy sequence decreases the transmission efficiency (TE) and in PTS, the complexity increases when the number of subblock increases. The DSI-PTS scheme has less complexity while the PAPR reduction is even better than PTS and DSI. Simulation and results are presented for IEEE 802.16-2004 standard. The Saleh model power amplifier is applied to show the effects of output spectrum in OFDM systems. Key words: Dummy sequence insertion (DSI), partial transmit sequence (PTS), orthogonal frequency division multiplexing (OFDM), worldwide interoperability for microwave access (WiMAX), peak to average power ratio (PAPR).
Highlights
An orthogonal frequency division multiplexing (OFDM) system has been proposed as a standard for the mobile communication systems
To evaluate and compare the performance of the DSIPTS with the conventional partial transmit sequence (PTS) and Dummy sequence insertion (DSI), Matlab simulation has been performed where the OFDM signal is WiMAX based on IEEE 802.16-2004 standards with
It is assumed here that the number of dummy sequence insertion ( NDSI ) is 55 which has no significant effect on the transmission efficiency ( TE = 100% )
Summary
An orthogonal frequency division multiplexing (OFDM) system has been proposed as a standard for the mobile communication systems. Dummy sequence insertion (DSI) and partial transmit sequence (PTS) are two existing distortionless peak to average power ratio (PAPR) reduction techniques that have been proposed for orthogonal frequency division multiplexing (OFDM) systems. In DSI, the main issue is the transmission efficiency which reduces when the number of dummy signal increases and the processing time is high.
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