Adaptive Equalization for Frequency Dispersion Correction and Interference Whitening in Wideband HF Radio Channels

2019 ◽  
Author(s):  
Dmitry Ivanov ◽  
Vladimir Ivanov ◽  
Natalya Ryabova ◽  
Vladimir Ovchinnikov
Keyword(s):  
Frequency Dispersion ◽  
Adaptive Equalization ◽  
Dispersion Correction ◽  
Radio Channels

scholarly journals Method of diagnosing frequency dispersion parameters for transionospheric propagation of wideband signals using GLONASS/GPS technologies

2019 ◽  
Vol 30 ◽  
pp. 15008 ◽  
Author(s):  
Dmitry Ivanov ◽  
Aleksey Kislitsin ◽  
Maria Ryabova
Keyword(s):  
Measurement Error ◽  
Frequency Dispersion ◽  
Electron Content ◽  
Dispersion Correction ◽  
Dispersion Parameters ◽  
Total Electron ◽  
Stochastic Error ◽  
Communication Signal ◽  
Wideband Signals ◽  
Adaptive Correction

To solve the problem of adaptive correction for dispersion distortions of the characteristics of a wideband transionospheric channel, we developed a method of diagnosing frequency dispersion parameters using satellite data on the total electron content (TEC) of the ionosphere developed. It also considers TEC measurement stochastic error. For this reason, we performed an analysis of the limitation of the communication signal bandwidth for the case of dispersion correction with an error. It was found that the TEC measurement error that typically exists in practice allows us to spread signal bandwidth by up to three times.

scholarly journals Adaptive wideband equalization for frequency dispersion correction in HF band considering variations in interference characteristics and ionosphere parameters

2019 ◽  
Vol 30 ◽  
pp. 15021
Author(s):  
Dmitry Ivanov ◽  
Vladimir Ivanov ◽  
Vladimir Ovchinnikov ◽  
Aleksey Elsukov ◽  
Maria Ryabova
Keyword(s):  
Software Defined Radio ◽  
Continuous Wave ◽  
Software Radio ◽  
Frequency Dispersion ◽  
Propagation Path ◽  
Test Facility ◽  
Propagation Mode ◽  
Dispersion Correction ◽  
Radio Technology ◽  
Continuous Wave Signal

Paper presents the outcomes of the studies into the adaptive wideband equalization for frequency dispersion correction in HF band considering variations in interference characteristics and ionosphere parameters. The subject matter of the research were megahertz-bandwidth channels with single-hop F layer propagation mode. There are presented data on variations in the channel amplitude frequency response that are caused by the interference of magneto-ionic components (intramodal multipath). Test facility for carrying out full-scale experiments was developed with the use of Universal Software Radio Peripheral platform supported by the groundbreaking software-defined radio technology. Verification of the developed methods and algorithms was performed in the experiments on oblique sounding over the Cyprus-to-Yoshkar-Ola propagation path by the linearly frequency modulated continuous wave signal.

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