Results 251 to 260 of about 1,050,910 (295)

Collision detection in IEEE 802.11 networks by error vector magnitude analysis

2012 IEEE Global Communications Conference (GLOBECOM), 2012
There are two causes of packet losses during a wireless transmission: losses caused by collisions and losses caused by poor channel conditions. The throughput and spatial reuse of IEEE 802.11 based wireless networks, as well as the effectiveness of the rate adaptation algorithms they use, is adversely affected by their inability to determine the real ...
Muhammad Naveed Aman, Wai Kin Chan, Biplab Sikdar   +2 more
openaire   +2 more sources

A novel measurement of error vector magnitude for TD-LTE termination

2012 5th International Congress on Image and Signal Processing, 2012
With the appearance of Time Division-Long Term Evolution (TD-LTE) standard in succession, investigation and measurement of TD-LTE termination performance has been a distinctive bottleneck in the process of its development. So it is a great practical significance to research of TD-LTE termination testing instrument with integrated testing function of RF,
Xiaowen Li, Deyi Peng, Guozhong Wang
openaire   +2 more sources

Adaptive Modulation Based on Nondata-Aided Error Vector Magnitude for Smart Systems in Smart Cities

IEEE Internet of Things Journal, 2023
A smart city involves big data transmission (BDT) between smart systems, which increases queue delays and leads to difficulty in enhancing the spectral efficiency.
Fan Yang, Jie Huang, Arpit Bhardwaj, Amir Hussain, A. El-latif, K. Yu   +5 more
semanticscholar   +1 more source

A Noise Power Ratio Measurement Method for Accurate Estimation of the Error Vector Magnitude

IEEE Transactions on Microwave Theory and Techniques, 2017
Karl Freiberger, H. Enzinger, C. Vogel
semanticscholar   +3 more sources

Error Vector Magnitude as a Performance Standard for Antennas in the Millimeter-Wave Era: Part 2: Modeling, simulation, and measurement methods

IEEE Antennas & Propagation Magazine, 2023
The error vector magnitude (EVM) is a comprehensive measure of the amplitude and phase distortion of digitally modulated signals and a potential tool for characterizing the performance of active beamforming arrays, especially at millimeter-wave ...
Dustin Brown, Yahya Rahmat-Samii
semanticscholar   +1 more source

A Calibrated Over-the-Air Measurement Method for Error Vector Magnitude Characterization

IEEE Transactions on Instrumentation and Measurement, 2022
Error vector magnitude (EVM) is one of the key parameters to quantify the performance of a digital radio transmitter or receiver. However, the measurement method of EVM has not been formed properly, especially for those devices with integrated antenna, e.
Haidong Chen, Weijie Lin, Shuai Wang, W. Che, Q. Xue   +4 more
semanticscholar   +1 more source

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

Measurement, 2021
The Error Vector Magnitude (EVM) is a fundamental metric used in communications to quantify the wideband distortion generated by a non-linear system subject to modulated excitation.
G. P. Gibiino, A. M. Angelotti, A. Santarelli, P. Traverso   +3 more
semanticscholar   +1 more source

Minimizing the Error Vector Magnitude With Constrained Cubic Metric and Spectral Sidelobe in NC-OFDM-Based Cognitive Radio Systems

IEEE Transactions on Vehicular Technology, 2017
Chunxing Ni, Tao Jiang
semanticscholar   +3 more sources

OFDM Error Vector Magnitude Distortion Analysis

IEICE Transactions on Electronics, 2006
We derived explicit formulas for evaluating the error vector magnitude (EVM) from the amplitude distortion (AM-AM) and phase distortion (AM-PM) of power amplifiers (PAs) in orthogonal frequency-division multiplexing (OFDM) systems, such as the IEEE 802.1 1a/g wireless local area networks (WLANs) standards.
S. YAMANOUCHI, K. KUNIHIRO, H. HIDA
openaire   +1 more source

Error Vector Magnitude Analysis for OFDM Systems

2006 Fortieth Asilomar Conference on Signals, Systems and Computers, 2006
Error vector magnitude (EVM) is a popular figure-of-merit adopted by various communication standards for evaluating in-band distortions introduced in a communication system. In this paper, we regard EVM as a random variable and investigate its statistical distributions as the result of the following distortion mechanisms: phase noise, amplitude ...
Chunming Zhao, Robert J. Baxley
openaire   +1 more source