A low complexity multicarrier PAR reduction approach based on subgradient optimization
Signal Processing - Special section: Multimodal human-computer interfaces
Designing tone reservation PAR reduction
EURASIP Journal on Applied Signal Processing
PSD-constrained PAR reduction for DMT/OFDM
EURASIP Journal on Applied Signal Processing
Partial transmit sequences for peak-to-average power ratio reduction in multiantenna OFDM
EURASIP Journal on Wireless Communications and Networking - Multicarrier Systems
IEEE Transactions on Signal Processing
Novel probabilistic bounds on power level profile of spectrally-encoded spread-time CDMA signals
IEEE Transactions on Wireless Communications
Tone reservation to reduce the envelope fluctuations of multicarrier signals
IEEE Transactions on Wireless Communications
Reed-Solomon and simplex codes for peak-to-average power ratio reduction in OFDM
IEEE Transactions on Information Theory
Reduction of peak-to-average power ratio in transform domain communication systems
IEEE Transactions on Wireless Communications
LTE adaptation for mobile broadband satellite networks
EURASIP Journal on Wireless Communications and Networking - 3GPP LTE and LTE Advanced
Spectral precoding for constant-envelope OFDM
IEEE Transactions on Communications
A simplified suboptimal algorithm for tone reservation OFDM
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
A low-complexity scheme for frequency estimation in uplink OFDMA systems
IEEE Transactions on Wireless Communications
PAPR reduction of OFDM using PTS and error-correcting code subblocking
IEEE Transactions on Wireless Communications
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Common to all orthogonal frequency division multiplexing (OFDM) systems is a large peak-to-average-power ratio (PAR), which can lead to low power efficiency and nonlinear distortion at the transmit power amplifier. Tone reservation uses other unused or reserved tones to design a peak-cancelling signal that lowers the PAR of a transmit OFDM block. In contrast to previous methods, the new active-set method proposed here converges very quickly toward a minimum-PAR solution at a lower computational cost. An efficient real-baseband algorithm is well suited for discrete multitone (DMT) modulation over twisted-pair copper wiring, where some subchannels may have an insufficient SNR to reliably send data. The real PAR problem occurs in the analog signal before the power amplifier, and results focus on this figure of merit. The performance of oversampling before applying PAR reduction is analyzed, and results show that this is necessary to sufficiently handle the analog PAR problem. An extension of the real-baseband technique can be applied to complex-baseband signals to help reduce PAR in wireless and broadcast systems. By sacrificing 11 out of 256 OFDM tones (4.3%) for tone reservation, over 3 dB of analog PAR reduction can be obtained for a wireless system.