A Novel DFT Spreading Technique for Reduction of Peak- to-Average Power Ratio (PAPR) in OFDM Systems
Soumik Basak1, Koustav Sarkar2, Deepak Kumar3, Sudarshan Chakravorty4
1Soumik Basak, ECE department, MCKV Institute of Engineering Howrah, India.
2Koustav Sarkar, ECE department, MCKV Institute of Engineering Howrah, India.
3Deepak kumar, ECE department,MCKV institute of Engineering, Howrah , India
4Sudarshan Chakravorty, ECE department, MCKV Institute of Engineering, Howrah, India.
Manuscript received on April 03, 2013. | Revised Manuscript received on April 29, 2013. | Manuscript published on May 05, 2013. | PP: 102-105 | Volume-3, Issue-2, May 2013. | Retrieval Number: B1447053213/2013©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The transmitted signal in an OFDM system can have high peak values due to the presence of many subcarriers. The high Peak-to-average Power Ratio (PAPR), as compared to a single carrier system in an OFDM system is detrimental for its proper operation. It decreases the signal-to- quantization noise ratio (SQNR) of the Analog-to-Digital and Digital-To-Analog converters. This degrades the efficiency of the power amplifiers in the transmitter. This paper aims to improve the PAPR in the uplink by DFT spreading so as to preserve the limited battery power in a mobile terminal.
Keywords: DFT spreading, OFDM, Peak-to-Average Power Ratio, SQNR.DFT spreading, OFDM, Peak-to-Average Power Ratio, SQNR.