Results 71 to 80 of about 2,923 (181)

Anti-fading technology of near space communication based on quasi-constant envelope OFDM

Dianxin kexue, 2019
For the near space high altitude platform station (HAPS), its limited power, tight spectrum resources, and the multipath fading effects due to non line of sight (NLoS) and low elevation communication environment are the main problems.
Yang LU, Donglei ZHANG, Tingting WANG
doaj   +2 more sources

First-Order Statistical Characteristics of Macrodiversity System with Three Microdiversity MRC Receivers in the Presence of k-µ Short-Term Fading and Gamma Long-Term Fading

Journal of Electrical and Computer Engineering, 2016
Macrodiversity system with macrodiversity SC receiver and three microdiversity MRC (maximum ratio combining) receivers is considered. Independent k-μ short-term fading and correlated Gamma long-term fading are present at the inputs of microdiversity MRC ...
Branimir Jaksic, Mihajlo Stefanovic, Danijela Aleksic, Dragan Radenkovic, Sinisa Minic   +4 more
doaj   +1 more source

Performance analysis of incremental cooperative relaying system over composite multipath/shadowing fading channels

Tongxin xuebao, 2014
Since the performance metrics of digital communication systems over composite multipath/lognormal fading channels is intractable,a mixture Gamma (MG) fading model is used to approximate Nakagami-lognormal (NL) fading model.By using MG fading channel ...
HENGWei-jun CHENG, Yan HUANG
doaj   +2 more sources

Spectral-Centroid-Based Non-Coherent Detection for Chaos Shift Keying

Applied Sciences
Classical coherent chaos shift keying (CSK) provides certain physical-layer advantages by exploiting chaotic waveforms, but it relies on fragile chaos synchronization, which is difficult to maintain in multipath fading channels.
Tingting Huang, Shengmin Hong, Jundong Chen, Liangyi Kang   +3 more
doaj   +1 more source

Multicarrier Block-Spread CDMA for Broadband Cellular Downlink

EURASIP Journal on Advances in Signal Processing, 2004
Effective suppression of multiuser interference (MUI) and mitigation of frequency-selective fading effects within the complexity constraints of the mobile constitute major challenges for broadband cellular downlink transceiver design.
Leus Geert, De Man Hugo, Moonen Marc, Petré Frederik   +3 more
doaj   +1 more source

Exploring the Laplace Prior in Radio Tomographic Imaging with Sparse Bayesian Learning towards the Robustness to Multipath Fading. [PDF]

Sensors (Basel), 2019
Wang Z, Guo X, Wang G.
europepmc   +1 more source

MM-LoRa-Mod: A non-coherent LoRa modulation scheme for underwater acoustic communications

Dianxin kexue
LoRa (long-range) is an emerging low-power wide-area network technology. Facing challenges such as frequency selective fading multipath channels, existing LoRa schemes are subjected to issues like low data rates and high system complexity.
YU Xiao, XU Weikai, SUN Haixin, LIU Qi
doaj  

Deep Learning-Based Automatic Modulation Classification for OFDM Signals: From Synthetic Training to OTA Evaluation. [PDF]

Sensors (Basel)
Nelega R, Mezei MM, Polgar ZA, Kovacs G, Puschita E.   +4 more
europepmc   +1 more source

Optimizing 5G NR link layer parameters for eMBB and URLLC applications under dynamic channel and transmission configurations. [PDF]

Sci Rep
Pateriya S, Bandopadhaya S, Bairwa AK, Jain V.   +3 more
europepmc   +1 more source

A Deep Learning-Assisted Multi-Relay DCSK Communication System. [PDF]

Sensors (Basel)
Huang T, Hong S, Chen J, Kang L.
europepmc   +1 more source