scholarly journals Accounting for masking of frequency modulation by amplitude modulation with the modulation filter-bank concept

2019 ◽  
Vol 145 (4) ◽  
pp. 2277-2293 ◽  
Author(s):  
Andrew King ◽  
Léo Varnet ◽  
Christian Lorenzi
Keyword(s):  
Amplitude Modulation ◽  
Frequency Modulation ◽  
Filter Bank ◽  
Modulation Filter

Residual amplitude modulation suppression to 6x10-7 in frequency modulation

2021 ◽  
Author(s):  
xinqian guo ◽  
Linbo Zhang ◽  
jun liu ◽  
long chen ◽  
le fan ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Frequency Modulation ◽  
Residual Amplitude Modulation

scholarly journals Mechanisms of spectrotemporal modulation detection for normal- and hearing-impaired listeners

2020 ◽  
Author(s):  
Emmanuel Ponsot ◽  
Léo Varnet ◽  
Nicolas Wallaert ◽  
Elza Daoud ◽  
Shihab A. Shamma ◽  
...  
Keyword(s):  
Auditory Processing ◽  
Filter Bank ◽  
Hearing Impaired ◽  
Temporal Modulation ◽  
Unified Framework ◽  
Cochlear Hearing Loss ◽  
Band Pass ◽  
Modulation Filtering ◽  
Modulation Filter ◽  
Processing Architecture

AbstractSpectrotemporal modulations (STMs) offer a unified framework to probe suprathreshold auditory processing. Here, we introduce a novel methodological framework based on psychophysical reverse-correlation deployed in the modulation space to characterize how STMs are detected by the auditory system and how cochlear hearing loss impacts this processing. Our results show that young normal-hearing (NH) and older hearing-impaired (HI) individuals rely on a comparable non-linear processing architecture involving non-directional band-pass modulation filtering. We demonstrate that a temporal-modulation filter-bank model can capture the strategy of the NH group and that a broader tuning of cochlear filters is sufficient to explain the overall shift toward temporal modulations of the HI group. Yet, idiosyncratic behaviors exposed within each group highlight the contribution and the need to consider additional mechanisms. This integrated experimental-computational approach offers a principled way to assess supra-threshold auditory processing distortions of each individual.

Probing the Adsorption of Weak Acids on Graphite Using Amplitude Modulation–Frequency Modulation Atomic Force Microscopy

Langmuir ◽  
2015 ◽  
Vol 31 (10) ◽  
pp. 3069-3075 ◽  
Author(s):  
Ahmed M. A. Moustafa ◽  
Jun Huang ◽  
Kerry N. McPhedran ◽  
Hongbo Zeng ◽  
Mohamed Gamal El-Din
Keyword(s):  
Atomic Force Microscopy ◽  
Amplitude Modulation ◽  
Frequency Modulation ◽  
Modulation Frequency ◽  
Weak Acids ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals Review of Channel Estimation for Candidate Waveforms of Next Generation Networks

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 956 ◽  
Author(s):  
Owoicho E. Ijiga ◽  
Olayinka O. Ogundile ◽  
Ayokunle D. Familua ◽  
Daniel J. J. Versfeld
Keyword(s):  
Fading Channels ◽  
Amplitude Modulation ◽  
Filter Bank ◽  
Rayleigh Fading ◽  
Perfect Reconstruction ◽  
Rayleigh Fading Channels ◽  
Next Generation Networks ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
5G Networks

The advancement in wireless communication applications encourages the use of effective and efficient channel estimation (CE) techniques because of the varying behaviour of the Rayleigh fading channel. In most cases, the emphasis of most proposed CE schemes is to improve the CE performance and complexity for ensuring quality signal reception and improved system throughput. Candidate waveforms whose designs are based on filter bank multi-carrier (FBMC) modulation techniques such as filter bank orthogonal frequency division multiplexing based on offset quadrature amplitude modulation (OFDM-OQAM), universal filtered multicarrier (UFMC) and generalised frequency division multiplexing based on offset quadrature amplitude modulation (GFDM-OQAM) are no exception to the use of these proposed CE techniques in the literature. These schemes are considered as potential waveform candidates for the physical/media access control layer of the emerging fifth generation (5G) networks. Therefore, pinpoint CE techniques represent an important requirement for these waveforms to attain their full potentials. In this regard, this paper reviews the concept of CE as applicable to these waveforms as well as other waveform candidates under consideration in the emerging 5G networks. Since the design of the majority of the waveform candidates is filter based, a review of the general filter design considerations is presented in this paper. Secondly, we review general CE techniques for candidate waveforms of next generation networks and classify some of the studied CE techniques. In particular, we classify the CE schemes used in filter bank OFDM-OQAM and GFDM-OQAM based transceivers and present a performance comparison of some of these CE schemes. Besides, the paper reviews the performances of two linear CE schemes and three adaptive based CE schemes for two FBMC based waveform candidates assuming near perfect reconstruction (NPR) and non-perfect reconstruction (Non-PR) filter designs over slow and fast frequency selective Rayleigh fading channels. The results obtained are documented through computer simulations, where the performances of the studied CE schemes in terms of the normalised mean square error (NMSE) are analysed. Lastly, we summarise the findings of this work and suggest possible research directions in order to improve the potentials of the studied candidate waveforms over Rayleigh fading channels.

Sign in / Sign up

Export Citation Format

Share Document