Results 11 to 20 of about 3,213,319 (172)

Adaptive Modulation Schemes for OFDM and SOQPSK Using Error Vector Magnitude (EVM) and Godard Dispersion [PDF]

, 2014
Abstract : n this paper, we develop a new approach which enables adaptation across two modulation schemes in the iNET standard: orthogonal frequency-division multiplexing (OFDM) and shaped-offset quadrature phased-shift keying (SOQPSK). We present the error vector magnitude (EVM) for OFDM and second-order Godard dispersion (D(2)) for SOQPSK as our link
Enkuang D. Wang, Brett T. Walkenhorst, Jieying Han   +2 more
core   +7 more sources

Transparent Topological Meta-Diplexer via Tightly Confined Valley Surface States. [PDF]

Adv Sci (Weinh)
An optically transparent topological metasurface supporting tightly confined valley surface states enables robust and flexible wave routing in an ultrathin platform. A compact transparent meta‐diplexer with spatially and spectrally separated channels is realized, while communication experiments verify high‐fidelity signal transmission, opening new ...
Li S, Li P, Lan Z, Li Y, Wong H, Chen MLN.   +5 more
europepmc   +2 more sources

On the EVM computation of arbitrary clipped multi-carrier signals [PDF]

EURASIP Journal on Advances in Signal Processing, 2011
A common figure of merit in multi-carrier systems is the error vector magnitude (EVM). A method for EVM computation of a multi-carrier signal without any underlying model (e.g., the Gaussianity assumption) was proposed in a previous work of the authors ...
Kotzer Igal, Litsyn Simon
doaj   +2 more sources

Broadband Measurement of Error Vector Magnitude for Microwave Vector Signal Generators Using a Vector Network Analyzer [PDF]

, 2022
A frequency-domain method is proposed for the broadband measurement of error vector magnitude (EVM) for vector signal generators (VSGs). The technique is based on frequency-swept narrowband acquisitions performed with a vector network analyzer (VNA) by ...
Gibiino, GP, Angelotti, AM, Santarelli, A, Traverso, PA   +3 more
core   +1 more source

Error vector magnitude measurement for power amplifiers under wideband load impedance mismatch: System-level analysis and VNA-based implementation [PDF]

, 2022
The Error Vector Magnitude (EVM) is a fundamental metric used in communications to quantify the wideband distortion generated by a non-linear device subject to modulated excitation.
Traverso P. A., Gibiino G. P., Santarelli A., Angelotti A. M.   +3 more
core   +1 more source

Deep Learning Assisted Pre-Carrier Phase Recovery EVM Estimation for Coherent Transmission Systems [PDF]

, 2021
We exploit deep supervised learning and amplitude histograms of coherent optical signals captured before carrier phase recovery (CPR) to perform time-sensitive and accurate error vector magnitude (EVM) estimation for 32 Gbaud mQAM signal monitoring ...
Udalcovs, Aleksejs, Pang, Xiaodan, Fan, Yuchuan,, Ozolins, Oskars, Sergei Popov, Carlos Natalino, Schatz, Richard,, Richard Schatz, Popov, Sergei,, Aleksejs Udalcovs, Furdek Prekratic, Marija,, Udalcovs, Aleksejs,, Natalino Da Silva, Carlos, Yuchuan Fan, Xiaodan Pang, Oskars Ozolins, Furdek Prekratic, Marija, Pang, Xiaodan,, Popov, Sergei, Marija Furdek, Fan, Yuchuan, Schatz, Richard, Natalino Da Silva, Carlos,, Ozolins, Oskars,   +23 more
core   +3 more sources

Statistical Distribution of EVM Measurements for Direct-Modulation Radio-Over-Fiber Links Transporting OFDM Signals [PDF]

, 2013
The effect of distortion on the error vector magnitude (EVM) performance of orthogonal frequency-division multiplexing (OFDM) signals with different numbers of subcarriers and the connection to the peak-to-average power ratio (PAPR) of such signals is ...
Nkansah, Anthony, Gomes, Nathan J., Wake, David, Assimakopoulos, Philippos   +3 more
core   +1 more source

AraAssim/AraAssim-Vector-magnitude-and-arctangent-approximation: Vector magnitude & arctangent

, 2021
This project is concerned with designing a device for approximating vector magnitude and arctangent, all the required source codes and scripts are provided, in addition to that, the entire project implementation process is explained in README.md ...
AraAssim
core   +1 more source

Optimal Design of Mobile Fronthaul Delta-Sigma Modulator based on Search Algorithm

Guangtongxin yanjiu, 2022
The Common Public Radio Interface (CPRI) used in mobile fronthaul has low spectrum efficiency. In this paper, we propose to use Delta-Sigma Modulation (DSM) technology as a new fronthaul interface.
WU Zi-qiang, ZHONG Lin-sheng, TAN Da-yong, YANG Qi   +3 more
doaj   +3 more sources

A Simple and Efficient IQ Data Compression Method Based on Latency, EVM, and Compression Ratio Analysis

IEEE Access, 2019
Latency, error vector magnitude (EVM) and compression ratio (CR) are performance evaluation factors of IQ data compression. The purposes of IQ data compression are to minimize the latency, EVM and to maximize the CR.
Jewon Lee, Eunhee Hyun, Joon-Young Jung
doaj   +1 more source