Results 41 to 50 of about 465 (189)

Randomized Beamforming With Generalized Selection Transmission for Security Enhancement in MISO Wiretap Channels

IEEE Access, 2018
Transmit beamforming (TBF) has been proposed as an effective approach to enhance the security performance of multiple-input single-output (MISO) wiretap channels. However, this secrecy enhancement comes at some expenses, such as power consumption and the
Morteza Soltani, Huseyin Arslan
doaj   +1 more source

Impact of Imperfect Angle Estimation on Spatial and Directional Modulation

IEEE Access, 2020
In this paper, we investigate the impact of imperfect angle estimation (IAE) on spatial and directional modulation (SDM) systems, assuming that the signal experiences line of sight (LoS) propagation.
Hongyan Zhang, Yue Xiao, Yanping Xiao, Wei Xiang   +3 more
doaj   +1 more source

Physical Layer Security using Time-Reversal Pre-Coding based OFDM-DCSK Communication System with Artificial Noise Injection

Journal of Communications Software and Systems, 2023
In this paper, Time-Reversal (TR) pre-coding with Artificial Noise (AN) injection is proposed to enhance the physical layer security (PLS) performance in orthogonal Frequency Division Multiplexing-Differential Chaos Shift Keying (OFDM-DCSK) system, which
Dhuha Hussein Hameed, Fadhil S. Hasan
doaj   +1 more source

Monetary and Macroprudential Policies under Dollar‐Denominated Foreign Debt

Journal of Money, Credit and Banking, EarlyView.
Abstract This paper studies monetary and macroprudential policies in a small open economy that borrows from abroad in foreign currency. The model features a novel mechanism in which exchange rate depreciation triggered by a borrowing constraint is amplified through balance of payments adjustments, increasing the real burden of foreign debt and causing ...
HIDEHIKO MATSUMOTO
wiley   +1 more source

Econometrics at the Extreme: From Quantile Regression to QFAVAR1

Journal of Economic Surveys, Volume 40, Issue 3, Page 1672-1686, July 2026.
ABSTRACT This paper surveys quantile modelling from its theoretical origins to current advances. We organize the literature and present core econometric formulations and estimation methods for: (i) cross‐sectional quantile regression; (ii) quantile time series models and their time series properties; (iii) quantile vector autoregressions for ...
Stéphane Goutte, Konstantinos N. Konstantakis, Dimitris Konstantios, Panayotis G. Michaelides, Arsenios‐Georgios N. Prelorentzos   +4 more
wiley   +1 more source

Physical Layer Security in an OFDM Time Reversal SISO Communication With Imperfect Channel State Information

IEEE Access, 2022
A frequency domain time-reversal (TR) precoder is proposed to perform physical layer security in single-input single-output (SISO) systems using orthogonal frequency-division multiplexing (OFDM) and artificial noise (AN) injection. This scheme guarantees
Sidney J. Golstein, Francois Rottenberg, Francois Horlin, Philippe De Doncker, Julien Sarrazin   +4 more
doaj   +1 more source

Tuning the Phase Structure and Electrical Properties of BNKT‐Based Ceramics via Li+ Doping

Advanced Materials Interfaces, Volume 13, Issue 6, 16 March 2026.
Li+‐doped Bi0.5[Na0.84‐xK0.16Lix]0.5TiO3 lead‐free piezoelectric ceramics are fabricated. The optimized composition delivers a high piezoelectric coefficient d33 and elevated depolarization temperature Td. It also shows large electrostrain and high Curie temperature, greatly extending the working temperature range for BNT‐based piezoelectric ...
Guangzhi Dong, Luyao Wang, Bilin Zhang, Ning Yang, Yifan Zhang, Xinyang Guo, Shilong Wang, Rusen Yang, Huiqing Fan, Haitao Huang   +9 more
wiley   +1 more source

On the ergodic secrecy capacity of the wiretap channel under imperfect main channel estimation

, 2011
The ergodic secrecy capacity of the wiretap channel is known when the main channel (between the transmitter and the legitimate receiver) state information (CSI) is perfect at the transmitter and the coherence period is sufficiently large to enable random
Khisti, Ashish J., Alouini, Mohamed-Slim, Zouheir Rezki, Mohamed-Slim Alouini, Ashish Khisti, Rezki, Zouheir   +5 more
core   +1 more source

Secure D2D underlaying cellular communication based on artificial noise assisted

Tongxin xuebao, 2015
A secure communication scheme based on artificial noise assisted from base station(BS)was proposed to improve the system secrecy rate of the D2D underlaying cellular.Firstly,the system secrecy rate was modeled.Then the BS with multi-antennas added ...
Xiao-lei KANG, Xin-sheng JI, Kai-zhi HUANG   +2 more
doaj   +2 more sources

Physical Layer Security Using Two-Path Successive Relaying

Sensors, 2016
Relaying is one of the useful techniques to enhance wireless physical-layer security. Existing literature shows that employing full-duplex relay instead of conventional half-duplex relay improves secrecy capacity and secrecy outage probability, but this ...
Qian Yu Liau, Chee Yen Leow, Zhiguo Ding
doaj   +1 more source