DocumentCode :
680842
Title :
Joint Sidelobe Suppression and PAPR Reduction in OFDM Using Partial Transmit Sequences
Author :
Guvenkaya, Ertugrul ; Tom, Anas ; Arslan, Huseyin
Author_Institution :
Dept. of Electr. Eng., Univ. of South Florida, Tampa, FL, USA
fYear :
2013
fDate :
18-20 Nov. 2013
Firstpage :
95
Lastpage :
100
Abstract :
Orthogonal frequency-division multiplexing (OFDM) waveform is known for its drawbacks that affect application in practice: high out-of-band (OOB) radiation and high peak-to-average power ratio (PAPR). In this paper, we propose a three-stage technique for the joint reduction of OOB radiation and PAPR, therefore minimizing the spectral regrowth after the power amplifier as well as signal distortion. In the first and the second stages, the OFDM data vector is partitioned into contiguous blocks that are naturally suited for PAPR reduction using partial transmit sequences (PTS). Since edge blocks/subcarriers have more impact on the OOB radiation, each edge block is further divided into smaller interleaved sub-blocks, and optimized phase rotations are applied to each sub-block to suppress the spectral sidelobes. Following the frequency domain techniques, optimum phase rotation for the time domain OFDM symbol is calculated to achieve smoother transition with the previous symbol, which further reduces the OOB spectrum. The proposed method improves the joint containment in frequency and power dimensions, along which the OFDM signal suffers from high spreading.
Keywords :
OFDM modulation; distortion; power amplifiers; sequences; time-domain analysis; OFDM data vector; OOB radiation; PAPR reduction; PTS; joint sidelobe suppression; optimized phase rotations; orthogonal frequency division multiplexing; out-of-band radiation; partial transmit sequences; peak-to-average power ratio; power amplifier; signal distortion; spectral regrowth; time domain OFDM symbol; Frequency-domain analysis; Joints; Partial transmit sequences; Peak to average power ratio; Time-domain analysis; Vectors; OFDM; PAPR reduction; sidelobe suppression;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Military Communications Conference, MILCOM 2013 - 2013 IEEE
Conference_Location :
San Diego, CA
Type :
conf
DOI :
10.1109/MILCOM.2013.26
Filename :
6735605
Link To Document :
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