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Sensitivity of EUV resists to out-of-band radiation

by Jeanette M. Roberts*a, Robert L. Bristola, Todd R. Younkina, Theodore H. Fedynyshyn B, David K, Astolfi B, Alberto Cabral B
"... Here we present the relative sensitivity of EUV resists to out of band radiation (OOB), specifically wavelengths in the range 157- 400 nm. EUV light sources have specifications limiting the allowed energy output in that spectral range yet there is little data supporting the specified values. Filters ..."
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Here we present the relative sensitivity of EUV resists to out of band radiation (OOB), specifically wavelengths in the range 157- 400 nm. EUV light sources have specifications limiting the allowed energy output in that spectral range yet there is little data supporting the specified values

OUT-OF-BAND POWER REDUCTION IN MIMO OFDM

by Robert F. H. Fischer, Christian Siegl, Martin Hoch
"... One of the main disadvantages of orthogonal frequency-division multiplexing (OFDM) is its large peak-to-average power ratio (PAR). In case of nonlinear power amplification this fact causes undesired out-of-band radiation. In this paper PAR reduction schemes for multiple-antenna OFDM, in particular v ..."
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One of the main disadvantages of orthogonal frequency-division multiplexing (OFDM) is its large peak-to-average power ratio (PAR). In case of nonlinear power amplification this fact causes undesired out-of-band radiation. In this paper PAR reduction schemes for multiple-antenna OFDM, in particular

Out-of-Band Power Reduction using Selected Mapping with Power-Amplifier-Oriented Metrics

by Christian Siegl, Robert F. H. Fischer
"... Abstract — OFDM systems suffer from a high dynamic of the transmit signal, which leads to out-of-band radiation due to nonlinearities in the transmitter front-end. In order to overcome this issue there exist a variety of schemes reducing the out-of-band power. Most of these schemes consider the peak ..."
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Abstract — OFDM systems suffer from a high dynamic of the transmit signal, which leads to out-of-band radiation due to nonlinearities in the transmitter front-end. In order to overcome this issue there exist a variety of schemes reducing the out-of-band power. Most of these schemes consider

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by unknown authors
"... Abstract—In orthogonal frequency division multiplexing (OFDM) systems the reduction of out-of-band radiations is an essential topic. To design a successful OFDM based overlay systems, it is important to reduce the sidelobes in OFDM systems. In this paper we consider three approaches: Subcarrier weig ..."
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Abstract—In orthogonal frequency division multiplexing (OFDM) systems the reduction of out-of-band radiations is an essential topic. To design a successful OFDM based overlay systems, it is important to reduce the sidelobes in OFDM systems. In this paper we consider three approaches: Subcarrier

Reducing the Peak to Average Power Ratio of Multicarrier Signals by Adaptive Subcarrier Selection

by Heiko Schmidt, Karl-dirk Kammeyer - IEEE International Conference on Universal Personal Communications (ICUPC , 1998
"... A non-constant envelope is a fundamental problem of the multicarrier technique OFDM. In many cases, nonlinear power amplifiers with power saturation lead to high out-of-band radiation. Another characteristic of OFDM is the influence of frequency selective fading of mobile radio channels. To overcome ..."
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A non-constant envelope is a fundamental problem of the multicarrier technique OFDM. In many cases, nonlinear power amplifiers with power saturation lead to high out-of-band radiation. Another characteristic of OFDM is the influence of frequency selective fading of mobile radio channels

COMPARISON OF VARIOUS NOISE MITIGATION TECHNIQUE USED WITH CLIPPING FOR REDUCTION OF PAPR IN OFDM

by Hemant Choubey, Aparna Singh, Amit Shukla
"... A simple technique used to reduce the PAPR of OFDM signals is to clip the signal to a maximum allowed value, at the cost of BER degradation and out-of-band radiation. Clipping does not add extra information to the signal and high peaks occur with low probability so the signal is seldom distorted. Ou ..."
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A simple technique used to reduce the PAPR of OFDM signals is to clip the signal to a maximum allowed value, at the cost of BER degradation and out-of-band radiation. Clipping does not add extra information to the signal and high peaks occur with low probability so the signal is seldom distorted

An efficient technique for reducing PAPR of OFDM system in the presence of high power amplifier

by H. Y. Sakran, M. Shokair, A. A. Elazm - IEEE , 2008
"... Abstract—Peak to Average Power Ratio (PAPR) is one of the serious problems in any wireless communication system using multi carrier modulation technique like OFDM, which reduces the efficiency of the transmit high power amplifier. In this paper, proposed scheme will be introduced that combine interl ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
interleaving method with peak windowing. Simulation results show that our technique simultaneously decrease Bit Error Rate (BER), reduce the PAPR by 3.5 dB and improve out-of-band radiation, in presence of nonlinear power amplifier model. 1.

Reduction of the Clipping Noise for OFDM/OQAM System

by Guobing Cheng, Qifu Lv, Shaoqian Li, Lisha Gong, Binhong Dong, Su Hu , 2013
"... Orthogonal frequency division multiplex/offset QAM (OFDM/OQAM) has been proven to be a promising multi-carrier modulation (MCM) technique for the transmission of signals over multipath fading channels. However, OFDM/OQAM has also the intrinsic disadvantage of high peak-to-average-power ratio (PAPR) ..."
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) that should be alleviated. This paper focuses on the reduction of the clipping noise and out-of band radiation caused by the clipping process. The basic prin-ciple is to estimate the clipping noise and then eliminate it from the received signal. Analysis and simulation results show that, with one time

Iterative estimation and cancellation of clipping noise for OFDM signals

by Hangjun Chen, Er M. Haimovich, Senior Member - IEEECommun. Lett , 2003
"... Abstract—Clipping is an efficient and simple method to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. However, clipping causes distortion and out-of-band radiation. In this letter, a novel iterative receiver is proposed to estimate and can ..."
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Abstract—Clipping is an efficient and simple method to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. However, clipping causes distortion and out-of-band radiation. In this letter, a novel iterative receiver is proposed to estimate

Filter windows for EUV lithography

by Forbes R Powell , Terry A Johnson - Proc. SPIE 4343 , 2001
"... ABSTRACT Extreme -ultraviolet (EUV) lithography based on reflective optics is expected to require at least one filter window to 1) reduce out-of-band radiation in the ultraviolet, visible and infrared, 2) partially protect the optics from debris from the radiation source and any outgassing from the ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
ABSTRACT Extreme -ultraviolet (EUV) lithography based on reflective optics is expected to require at least one filter window to 1) reduce out-of-band radiation in the ultraviolet, visible and infrared, 2) partially protect the optics from debris from the radiation source and any outgassing from
Results 1 - 10 of 5,777