scholarly journals Filter Bank Multi Carrier Signal System for Frequency Selective Channels

2021 ◽  
Vol 38 (2) ◽  
pp. 413-420
Author(s):  
Sarala Patchala ◽  
Sailaja Maruvada
Keyword(s):  
Filter Bank ◽  
Fourier Transforms ◽  
Mimo System ◽  
Discrete Fourier Transforms ◽  
Power Spectral ◽  
Filter Bank Multicarrier ◽  
Narrow Frequency Band ◽  
Selective Channel ◽  
Spectral Control ◽  
Frequency Selective

Filter Bank Multicarrier (FBMC) frameworks are a subclass of multicarrier (MC) frameworks. The essential guideline, separating spectrum into many thin sub channels, may not be new, MC frameworks have seen wide appropriation. These days, multicarrier regulation frameworks dependent on the discrete Fourier transforms are usually used to transmit over recurrence particular channels subject to forceful noise aggravations. In any case, these handsets experience the ill effects of poor sub channel spectral control, that is, the measure of inter channel impedance isn't unimportant. It very well may be indicated that the framework execution reduces when it is dependent upon an unsettling influence with a large portion of its energy focused on a narrow frequency band. This Paper aims that identify the Filter Bank Multi Carrier (FBMC) performance. The MIMO system combined with the FBMC then identifies the over Frequency Selective Channel (FSC). Here the analysis for FSC, Flat fading model FBMC and system with MMSE equalization. The Prototype filters are analyzing the system performance characteristics. The Power Spectral Density (PSD) of the MIMO FBMC system for the given spectrum. The proposed systems are best to compare all existing technique and we measure the spectral efficiency of the system.

scholarly journals Análisis de la técnica UFMC en un canal multitrayecto y usando estimación de canal

2021 ◽  
Vol 9 (17) ◽  
pp. 26-39
Author(s):  
Hugo Wladimir Iza Benítez ◽  
Diego Javier Reinoso Chisaguano
Keyword(s):  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
Filter Bank ◽  
Estimation Method ◽  
Wireless Communication Systems ◽  
Ofdm Systems ◽  
Matlab Simulation ◽  
Fifth Generation ◽  
Power Spectral ◽  
Filter Bank Multicarrier

UFMC (Universal Filtered Multi-Carrier) is a novel multi-carrier transmission technique that aims to replace the OFDM (Orthogonal Frequency Division Multiplexing) modulation technique for fifth generation (5G) wireless communication systems. UFMC, being a generalization of OFDM and FBMC (Filter Bank Multicarrier), combines the advantages of these systems and at the same time avoids their main disadvantages. Using a Matlab simulation, this article presents an analysis of the robustness of UFMC against fading effects of multipath channels without using a CP (cyclic prefix). The behavior of the UFMC system is analyzed in terms of the PSD (Power Spectral Density), BER (Bit Error Rate) and MSE (Mean Square Error). The results show that UFMC reduces the out-band side lobes produced in the PSD of the processed signal. Also, it is shown that the pilot-assisted channel estimation method applied in OFDM systems can also be applied in UFMC systems.

scholarly journals Precoded Faster-than-Nyquist Signaling with Optimal Power Allocation in Frequency-Selective Channel

2021 ◽  
Author(s):  
Takumi Ishihara ◽  
Shinya Sugiura
Keyword(s):  
Mutual Information ◽  
Power Allocation ◽  
Shaping Filter ◽  
Optimal Power ◽  
Power Spectral ◽  
Bit Error Ratio ◽  
Selective Channel ◽  
Frequency Selective ◽  
Eigen Decomposition ◽  
Performance Results

<p>In this paper, we propose eigen decomposition-precoded faster-than-Nyquist (FTN) signaling with power allocation in a frequency-selective fading channel. More specifically, we derive mutual information associated with the proposed FTN signaling. Then, the optimal power coefficients are calculated such that the derived mutual information is maximized. Our analytical performance results show that the proposed FTN signaling scheme achieves a higher information rate than the conventional FTN signaling scheme without relying on power allocation and the classic Nyquist-based signaling scheme, under the assumption that all the schemes employ a root-raised cosine shaping filter. Moreover, our numerical simulation results of the bit error ratio performance and the power spectral density demonstrate that the proposed FTN scheme outperforms the conventional Nyquist-based signaling scheme without sacrificing any bandwidth broadening.<br></p><p><br></p><p>Postprint accepted on 24 March 2021 for publication in IEEE International Conference on Communications Workshops (ICC Workshops), June 2021.</p>

scholarly journals Precoded Faster-than-Nyquist Signaling with Optimal Power Allocation in Frequency-Selective Channel

2021 ◽  
Author(s):  
Takumi Ishihara ◽  
Shinya Sugiura
Keyword(s):  
Mutual Information ◽  
Power Allocation ◽  
Shaping Filter ◽  
Optimal Power ◽  
Power Spectral ◽  
Bit Error Ratio ◽  
Selective Channel ◽  
Frequency Selective ◽  
Eigen Decomposition ◽  
Performance Results

<p>In this paper, we propose eigen decomposition-precoded faster-than-Nyquist (FTN) signaling with power allocation in a frequency-selective fading channel. More specifically, we derive mutual information associated with the proposed FTN signaling. Then, the optimal power coefficients are calculated such that the derived mutual information is maximized. Our analytical performance results show that the proposed FTN signaling scheme achieves a higher information rate than the conventional FTN signaling scheme without relying on power allocation and the classic Nyquist-based signaling scheme, under the assumption that all the schemes employ a root-raised cosine shaping filter. Moreover, our numerical simulation results of the bit error ratio performance and the power spectral density demonstrate that the proposed FTN scheme outperforms the conventional Nyquist-based signaling scheme without sacrificing any bandwidth broadening.<br></p><p><br></p><p>Postprint accepted on 24 March 2021 for publication in IEEE International Conference on Communications Workshops (ICC Workshops), June 2021.</p>

scholarly journals A Study of an Iterative Channel Estimation Scheme of FS-FBMC System

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
YongJu Won ◽  
JongGyu Oh ◽  
JinSeop Lee ◽  
JoonTae Kim
Keyword(s):  
Channel Estimation ◽  
Filter Bank ◽  
Multipath Fading ◽  
Modulation Scheme ◽  
Channel State ◽  
Multipath Fading Channel ◽  
Pilot Signal ◽  
Filter Bank Multicarrier ◽  
Selective Channel ◽  
Estimation Scheme

A filter bank multicarrier on offset-quadrature amplitude modulation (FBMC/OQAM) system is an alternative multicarrier modulation scheme that does not need cyclic prefix (CP) even in the presence of a multipath fading channel by the properties of prototype filter. The FBMC/OQAM system can be implemented either by using the poly-phase network with fast fourier transform (PPN-FFT) or by using the extended FFT on a frequency-spreading (FS) domain. In this paper, we propose an iterative channel estimation scheme for each sub channel of a FBMC/OQAM system over a frequency-spreading domain. The proposed scheme first estimates the channel using the received pilot signal in the subchannel domain and interpolates the estimated channel to fine frequency-spreading domain. Then the channel compensated FS domain pilot is despread again to modify the channel state information (CSI) estimation. Computer simulation shows that the proposed method outperforms the conventional FBMC/OQAM channel estimator in a frequency selective channel.

scholarly journals Cell shape characterization and classification with discrete Fourier transforms and self-organizing maps

2017 ◽  
Vol 93 (3) ◽  
pp. 323-333 ◽  
Author(s):  
Fabian L. Kriegel ◽  
Ralf Köhler ◽  
Jannike Bayat-Sarmadi ◽  
Simon Bayerl ◽  
Anja E. Hauser ◽  
...  
Keyword(s):  
Cell Shape ◽  
Fourier Transforms ◽  
Self Organizing Maps ◽  
Discrete Fourier Transforms ◽  
Shape Characterization ◽  
Self Organizing
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