Results 91 to 100 of about 62,657 (220)
MMSE Channel Prediction Assisted Symbol-by-Symbol Adaptive OFDM
, 2002 Subband Adaptive Orthogonal Frequency Division Multiplexing (OFDM) constitutes an effective method of compensating for the frequency selective fading incurred by mobile receivers.
Münster, M., Hanzo, L.
core +1 more source
Superposed IM-OFDM (S-IM-OFDM): An Enhanced OFDM for Integrated Sensing and Communications
IEEE Transactions on Vehicular TechnologyIntegrated sensing and communications (ISAC) is a critical enabler for emerging 6G applications, and at its core lies in the dual-functional waveform design. While orthogonal frequency division multiplexing (OFDM) has been a popular basic waveform, its primitive version falls short in sensing due to the inherent unregulated auto-correlation properties.
Zonghui Yang +3 more
openaire +4 more sources
TeknikThe Wi-fi 5 IEEE 802.11ac can achieve throughput up to 6,933 Mbps by occupying 160MHz of bandwidth in each eight spatial streams with 256-QAM. It provides not only very high throughput but also high performance of wireless communications. However, due to
Wahyul Amien Syafei +3 more
doaj +1 more source
Synchronization technics for OFDM systems [PDF]
, 2006 [ENGLISH] The thesis deals with the problem of synchronization in Orthogonal Frequency Division Multiplexing (OFDM) systems. This modulation technique has been in existence since 1960, however, in the last years OFDM modulation is emerged as a key ...
Fusco, Tilde
core +1 more source
Performance Evaluation of a Standalone OFDM System for Digital Image Transmission over AWGN Channels
Journal of Innovation Information Technology and ApplicationThis study investigates the performance of a standalone digital communication system based on Orthogonal Frequency Division Multiplexing (OFDM) for digital image transmission over Additive White Gaussian Noise (AWGN) channels. The system was tested using
Ade silvia handayani +7 more
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Active and passive sensors for diagnostics quasi-zenith ionospheric HF communication channels
Физика волновых процессов и радиотехнические системыBackground. There is a growing need for active sensory diagnostics of partial HF channels to provide frequency support to quasi-zenith HF radio links in varying signal propagation conditions.
Dmitry V. Ivanov +3 more
doaj +1 more source
Impulsive noise effects on DWT- and WPT-OFDM versus FFT-OFDM
, 2009 We demonstrate a performance study on waveletbased OFDM, particularly using DWT and WPT-OFDM as substitutions for Fourier- based OFDM with the focus on impulse noise effects. We begin by constructing the models of the inverse and forward transforms.
Khaizuran Abdullah (19969887) +1 more
core
Maximum entropy principle in deep learning: from theory to a practical regularizer for complex data
Научно-технический вестник информационных технологий, механики и оптикиWe hypothesize and experimentally validate that maximizing the entropy of embedding distributions under specific constraints enhances the generalization ability of machine learning models. To test this hypothesis, we propose a novel regularization method
A. V. Timofeev
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Generic MMSE Decision Directed Channel Estimation for OFDM and MC-CDMA
, 2004 In this letter we propose a Minimum Mean Square Error (MMSE) Channel Impulse Response (CIR) estimator-aided Decision Directed Channel Estimation (DDCE) method, which is suitable for employment in both OFDM and MC-CDMA systems.
Akhtman, Jos, Hanzo, Lajos
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Wireless multi-carrier transmission techniques for commercial deployment in LTE, LTE-A, and 5G FR1
Journal of Electrical Systems and Information TechnologyThe multi-carrier transmission based on orthogonal frequency-division multiplexing (OFDM) footing is invented to mitigate problems of multipath echoes and dispersion effect incurred by earlier multiple channel access techniques.
Zakka Augustine +7 more
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