Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Abbas Ali Sharifi"'
Publikováno v:
ICT Express, Vol 6, Iss 4, Pp 368-371 (2020)
Orthogonal frequency division multiplexing (OFDM) has been proposed to achieve high data rate transmission in wireless communications. The OFDM system usually suffers from the high envelope fluctuations called peak-to-average power ratio (PAPR). The
Externí odkaz:
https://doaj.org/article/b97b103e27f14fec816fcd84d43711cc
Autor:
Hojjat Emami, Abbas Ali Sharifi
Publikováno v:
ICT Express, Vol 6, Iss 3, Pp 258-261 (2020)
The large amplitude variations of OFDM signals generate in-band distortion and out-of-band radiation. In recent years, cubic metric (CM) has been verified as a more accurate metric to measure the amplitude variations. In this paper, the PTS technique
Externí odkaz:
https://doaj.org/article/990d74dd39274b7f8fdf83197bc0bfa8
Publikováno v:
ICT Express, Vol 5, Iss 3, Pp 178-181 (2019)
Orthogonal frequency division multiplexing (OFDM) is a multicarrier modulation technique for high-speed data transmission in wireless communications. In an OFDM system, a large number of subcarriers are used to transmit the modulated symbols and cons
Externí odkaz:
https://doaj.org/article/a289119cd43843419a4c5edd52b6a5bc
Autor:
Abbas Ali Sharifi
Publikováno v:
ICT Express, Vol 5, Iss 3, Pp 202-205 (2019)
Orthogonal frequency division multiplexing (OFDM) is extensively used in optical communications to achieve high rate transmission. In this paper, Vandermonde like matrix (VLM) pre-coding approach is offered to reduce the high peak-to-average power ra
Externí odkaz:
https://doaj.org/article/b6da3c39350d40e3b84e8cb43f7cc19f
Autor:
Abbas Ali Sharifi
Publikováno v:
ICT Express, Vol 5, Iss 2, Pp 100-103 (2019)
The high peak-to-average power ratio (PAPR) is one of the major drawbacks of the orthogonal frequency division multiplexing (OFDM) systems that make non-linear distortion in practical implementation of high power amplifier (HPA). In this study, the p
Externí odkaz:
https://doaj.org/article/69d09a09211647fb989f0143db4f460d
Autor:
Ghanbar Azarnia, Abbas Ali Sharifi
Publikováno v:
Wireless Networks. 28:3771-3778
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa06257102127a9a15f870e885fc6992
https://doi.org/10.1007/s11276-022-03080-z
https://doi.org/10.1007/s11276-022-03080-z
Autor:
Abbas Ali Sharifi, Ghanbar Azarnia
Publikováno v:
Wireless Networks. 27:4603-4614
Recently, cooperative and distributed processing has been attracted a lot of attention, especially in wireless sensor networks, to prolong the network’s lifetime. So, distributed adaptive filtering, which operates in a distributed and adaptive mann
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bceb0c26e08af1f2912302e700a35376
https://doi.org/10.1007/s11276-021-02754-4
https://doi.org/10.1007/s11276-021-02754-4
Autor:
Abbas Ali Sharifi, Hojjat Emami
Publikováno v:
Soft Computing. 25:11405-11419
This paper presents a computationally efficient and robust evolutionary algorithm to find the better permutation of weighting phase factors in minimizing envelope fluctuations of orthogonal frequency division multiplexing signals. The proposed optimi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68aecfd75713d6cdcc025796bdedd106
https://doi.org/10.1007/s00500-021-05944-6
https://doi.org/10.1007/s00500-021-05944-6
Publikováno v:
ICT Express, Vol 6, Iss 4, Pp 368-371 (2020)
Orthogonal frequency division multiplexing (OFDM) has been proposed to achieve high data rate transmission in wireless communications. The OFDM system usually suffers from the high envelope fluctuations called peak-to-average power ratio (PAPR). The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd383dbd8f74d0da6821676ef5948c22
http://www.sciencedirect.com/science/article/pii/S2405959520301107
http://www.sciencedirect.com/science/article/pii/S2405959520301107
Autor:
Abbas Ali Sharifi, Hojjat Emami
Publikováno v:
ICT Express, Vol 6, Iss 3, Pp 258-261 (2020)
The large amplitude variations of OFDM signals generate in-band distortion and out-of-band radiation. In recent years, cubic metric (CM) has been verified as a more accurate metric to measure the amplitude variations. In this paper, the PTS technique
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dfcd0c2424df0d3e2ea7d622dfb2272
http://www.sciencedirect.com/science/article/pii/S2405959519304060
http://www.sciencedirect.com/science/article/pii/S2405959519304060