Results 21 to 30 of about 190,014 (273)

Analysis of Hybrid PAPR Reduction Methods of OFDM Signal for HPA Models in Wireless Communications

open access: yesIEEE Access, 2020
Orthogonal Frequency Division Multiplexing (OFDM) suffers from a high Peak-to-Average Power Ratio (PAPR). Designing a High Power Amplifier (HPA) with high PAPR is not a wise technique as it roots the amplifier to operate in a non-linear region which is ...
Sravanti Thota   +2 more
doaj   +1 more source

Teknik Reduksi PAPR Pada Sistem OFDM Dengan Partial Transmit Sequence (PTS) dan Selected Mapping (SLM)

open access: yesJurnal Elektronika dan Telekomunikasi, 2016
Orthogonal Frequency Division Multiplexing (OFDM) merupakan teknik modulasi multicarrier yang banyak diadopsi oleh berbagai teknologi komunikasi nirkabel untuk memenuhi kebutuhan akses broadband yang kian meningkat karena menyediakan transmisi dengan ...
Chaeriah Bin Ali Wael   +2 more
doaj   +1 more source

Peak-to-Average Power Ratio Reduction of FBMC/OQAM Signal Using a Joint Optimization Scheme

open access: yesIEEE Access, 2017
Owing to the signal structure difference between the filter bank multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) and the orthogonal frequency-division multiplexing (OFDM) systems, the existing technologies to reduce the peak-to ...
Junhui Zhao, Shanjin Ni, Yi Gong
doaj   +1 more source

PAPR reduction in OFDM systems: An efficient PTS approach based on particle swarm optimization

open access: yesICT Express, 2019
Orthogonal frequency division multiplexing (OFDM) is a multicarrier modulation technique for high-speed data transmission in wireless communications.
Mehdi Hosseinzadeh Aghdam   +1 more
doaj   +1 more source

Energy efficiency optimization in MIMO interference channels: A successive pseudoconvex approximation approach [PDF]

open access: yes, 2018
In this paper, we consider the (global and sum) energy efficiency optimization problem in downlink multi-input multi-output multi-cell systems, where all users suffer from multi-user interference.
Chatzinotas, Symeon   +3 more
core   +2 more sources

Initial synchronisation of wideband and UWB direct sequence systems: single- and multiple-antenna aided solutions [PDF]

open access: yes, 2012
This survey guides the reader through the open literature on the principle of initial synchronisation in single-antenna-assisted single- and multi-carrier Code Division Multiple Access (CDMA) as well as Direct Sequence-Ultra WideBand (DS-UWB) systems ...
Hanzo, Lajos, Won, SeungHwan
core   +1 more source

Linear Precoding in Cooperative MIMO Cellular Networks with Limited Coordination Clusters [PDF]

open access: yes, 2010
In a cooperative multiple-antenna downlink cellular network, maximization of a concave function of user rates is considered. A new linear precoding technique called soft interference nulling (SIN) is proposed, which performs at least as well as zero ...
Huang, Howard, Ng, Chris T. K.
core   +1 more source

Downlink Power Control in User-Centric and Cell-Free Massive MIMO Wireless Networks

open access: yes, 2017
Recently, the so-called cell-free Massive MIMO architecture has been introduced, wherein a very large number of distributed access points (APs) simultaneously and jointly serve a much smaller number of mobile stations (MSs).
Buzzi, Stefano, Zappone, Alessio
core   +1 more source

Improving PAPR performance of filtered OFDM for 5G communications using PTS

open access: yesETRI Journal, 2020
The filtered orthogonal frequency division multiplexing (F‐OFDM) system has been recommended as a waveform candidate for fifth‐generation (5G) communications.
Yasir Amer Al‐Jawhar   +5 more
doaj   +1 more source

On the capacity of MIMO broadcast channels with partial side information [PDF]

open access: yes, 2005
In multiple-antenna broadcast channels, unlike point-to-point multiple-antenna channels, the multiuser capacity depends heavily on whether the transmitter knows the channel coefficients to each user.
Hassibi, Babak, Sharif, Masoud
core   +2 more sources

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