Channel estimation scheme based on compressed sensing and parameter estimation for an orthogonal frequency division multiplexing visible light communications system

Alleviate the multipath delay spread and suitable for broadband transmission efficiency, orthogonal frequency division multiplexing wireless local area network (WLAN) is widely used to assist inverse fast Fourier transform and fast Fourier transform operation domain. Orthogonal frequency division multiplexing is a blow to the broadcast channel multipath fading and high data throughput, transmission, wireless fading channel method, which is widely used to support high performance bandwidth-efficient wireless multimedia services. Several times in the transmitter and receiver antenna technology allows data transfer rate and spectrum efficiency and the use of multiple transmit antennas and multiple receive antennas through spatial processing. High-precision channel estimation scheme is very important wideband multi-carrier orthogonal frequency complex WLAN systems use multiple antenna receiver based division of labor and the overall multi-carrier orthogonal frequency multiplexing division of performance-based WLAN system is to crucial antenna to receive the symbol error rate. In this article, the iterative channel estimation scheme proposed multi-carrier orthogonal frequency division multiplexed using multiple antennas receiver-based WLAN system.

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Logistic-function-based nonlinear companding transform for asymmetrical hybrid optical orthogonal frequency division multiplexing visible light communications systems

Applied Optics ◽

10.1364/ao.57.009480 ◽

2018 ◽

Vol 57 (31) ◽

pp. 9480

Author(s):

T. Zhang ◽

Y. Zou ◽

J. N. Sun ◽

S. Qiao

Keyword(s):

Visible Light ◽

Orthogonal Frequency Division Multiplexing ◽

Logistic Function ◽

Frequency Division Multiplexing ◽

Visible Light Communications ◽

Frequency Division ◽

Communications Systems

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Multiple-Input-Single-Output Based a Novel Pilot-Aided Channel Estimation for Cyclic Delay Diversity Orthogonal Frequency Division Multiplexing Frameworks

Journal of Computational and Theoretical Nanoscience ◽

10.1166/jctn.2019.7793 ◽

2019 ◽

Vol 16 (2) ◽

pp. 697-701

Author(s):

D. Jagadeesan ◽

K. Palani ◽

G. Asha

Keyword(s):

Channel Estimation ◽

Orthogonal Frequency Division Multiplexing ◽

Low Complexity ◽

Frequency Division Multiplexing ◽

Frequency Division ◽

Cyclic Delay Diversity ◽

Single Output ◽

Estimation Scheme ◽

Significant Performance ◽

Delay Diversity

A low-complexity standard transmit diversity scheme for coded orthogonal frequency division multiplexing (OFDM) frameworks is cyclic delay diversity (CDD). As the cyclic delay esteem expands the diversity effect also increases. However, the channel estimation turns out to be more troublesome because of increased frequency selectivity as the increased cyclic delay value. In this paper we discussed about dissimilar channel estimation schemes and to conclude we proposed a novel pilot-aided channel estimation scheme for CDD to estimate the channel in an enhanced way. Our scheme estimates each channel separately and achieves significant performance improvement.

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