Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"error vector magnitude"”.
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Novel predistortion techniques for RF power amplifiers
… spectral regrowth by 40 dB and reduce the EVM (Error Vector Magnitude) down to 0.7% rms in 16 QAM signals, disregarding whether the tested power amplifiers or cascade amplifier systems exhibit significant nonlinearities and memory effects. i
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An Introduction to Local Multipoint Distribution Services with an Investigation of the Effects of Vegetation on the Radio Channel
… investigation of the effect of vegetation on the magnitude, phase and error vector magnitude (EVM) performance of an LMDS channel. The motivation for this experiment came from the review earlier work, which showed an unexpected relationship between carrier to noise ratio (C/N) and bit error rate …
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Digitally enhanced CMOS RF transmitter with integrated power amplifier
… 17.5% at 7 dB back-off, and the corresponding error-vector magnitude (EVM) was measured −29.6 dB and −26.3 dB with equalization, respectively. Peak DE of 55% and 25 dBm saturated output power were also measured for the same PA in a stand-alone package.
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Analysis of antenna beamforming architectures for wireless communications
… signal distortion is analyzed through Error Vector Magnitude (EVM) sweeps, and hardware viability is quantified by computing the computational complexity in Floating-Point Operations (FLOPs). The results demonstrate that analog beamforming is hardware and power efficient but remains …
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Multi-layer, Low-crosstalk Integrated Optical Switches
… signals with >40 dB RF dynamic range and <1.8% error vector magnitude (EVM). Future work will focus on lossless optical switching systems through advanced material engineering (e.g., low-loss SiN waveguides with optimized adiabatic tapers) and hybrid modulation schemes combining electro-optic …
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Link Adaptation for Mitigating Earth-to-Space Propagation Effects on the NASA SCaN Testbed
In Earth-to-Space communications, well-known propagation effects such as path loss and atmospheric loss can lead to fluctuations in the strength of the communications link between a satellite and its ground station. Additionally, a less-often considered effect of shadowing due to the geometry of …
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A Study of Interference Suppression Using Deep Learning Methods
… are quantified using popular metrics such as bit error rate (BER), error vector magnitude (EVM), and Signal to Noise-Interference Ratio (SINR). The proposed model outperforms the baselines with classical techniques such as matched filtering and least squares adaptive filtering consistently over …
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Efficient baseband design and implementation for high-throughput transmitters
… throughput from -30.6dB to -44.0dB and reduced error vector magnitude (EVM) from 4.5% down to 1.0% with 64-Quadrature-Amplitude-Modulation (64QAM) and real-time zero avoidance. The energy efficiency of this predistorter at a throughput of 1.1Gsamples/s (3.3Gbps data rate with 64QAM modulation …