OFDM transmitter power amplifier and PAR reduction performance: measurement and simulation

Gifford, S.; Kleider, J.E.; Chuprun, S.

doi:10.1109/milcom.2002.1180510

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…To avoid distortions, a signal with high PMEPR needs to be fed to an amplifier with an input power back-off greater than what would be needed for chirp that has an ideal PMEPR of ∼3 dB resulting in reduced the average output power [48], and consequently shorter maximum detection range compared to chirp. Another important aspect of PMEPR occurs at the transition between analogue and digital and viceversa, as PMEPR increases the maximum achievable SNR decreases.…”

Section: ) Peak-to-mean Envelope Power Ratio (Pmepr)mentioning

confidence: 99%

Performances of multitones for ultra-wideband software-defined radar

Kernec

Romain

2017

IEEE Access

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From the literature review, it is apparent that there is a gap in quantifying the performances of multitone waveforms specifically for radar applications and experimental results not commonly found. This paper focuses on the radar performance analysis of multitones with P3 phase-codes in simulation and experimentally to determine the effect of hardware on radar performances. For this purpose, a softwaredefined radar (SDR) approach has been used, including a digital core with hardware in-the-loop controlled by MATLAB and an analog front end that uses bandpass sampling and a reference channel. The proposed radar setup with processing algorithm has been evaluated in terms of processing time, showing that a realtime implementation on the latest field programmable gate array chipsets is feasible. This approach is flexible and entirely arbitrary waveforms can be generated with an instantaneous bandwidth up to 800 MHz. All the experimental results presented in Section IV are beyond the state of the art and bring novel insight into the impairment of SDR.

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Section: ) Peak-to-mean Envelope Power Ratio (Pmepr)mentioning

confidence: 99%

Performances of multitones for ultra-wideband software-defined radar

Kernec

Romain

2017

IEEE Access

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Iterative algorithm for nonlinear noise cancellation and channel re-estimation in nonlinearly distorted OFDM system

Štěrba

Gazda

Deumal

et al. 2010

2010 IEEE 8th International Symposium on Applied Machine Intelligence and Informatics (SAMI)

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This paper presets a new algorithm for nonlinear distortion cancellation and channel re-estimation in an iterative manner. Whereas in practical OFDM systems, in which nonlinear amplifiers are used, data as well as pilot symbols are nonlinearly distorted. As perfect channel state information is often assumed in many works and papers, the effect of nonlinear distortion on pilot symbols is often not accounted for, and only data symbols are considered. However, as pilot symbols are used to obtain channel state information, distortion inflicted to pilot symbols by nonlinear amplification is of great importance, and for this reason should be accounted for. To address this issue, simple algorithm will be introduced for joint data recovery and channel re-estimation in an iterative manner. This algorithm iteratively estimates nonlinear distortion and then uses it to compensate this nonlinear distortion present at data and pilot symbols, which are then used for subsequent and more precise channel re-estimation. As it is shown in this paper, proposed algorithm can be used to reduce nonlinear distortions even in a situation, when highly nonlinear amplifiers are applied.

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OFDM transmitter power amplifier and PAR reduction performance: measurement and simulation

Cited by 2 publications

References 9 publications

Performances of multitones for ultra-wideband software-defined radar

Performances of multitones for ultra-wideband software-defined radar

Iterative algorithm for nonlinear noise cancellation and channel re-estimation in nonlinearly distorted OFDM system

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