Results 81 to 90 of about 9,770 (211)
Asymptotic optimal SINR performance bound for space-time beamforming
, 2009 International audienceIn many detection applications, the main performance criterion is the signal to interference plus noise ratio (SINR). After linear filtering, the optimal SINR corresponds to the maximum value of a Rayleigh quotient, which can be ...
Oudin, Marc, Delmas, Jean-Pierre
core +1 more source
A Massive Grant‐Free Random Access Scheme Based on Spectrum Sensing and Preamble Delay
IET Communications, Volume 20, Issue 1, January/December 2026.This paper introduces cognitive radio (CR) and preamble delay (PD) to reduce access collisions, together with non‐orthogonal multiple access (NOMA) to improve spectrum efficiency, and thus proposes an efficient CR‐NOMA‐PD‐based massive grant‐free random multiple access scheme.
Jing Zhang +5 more
wiley +1 more source
Frontiers in Microbiology, 2016 The Gram-positive model organism Bacillus subtilis produces the essential second messenger signaling nucleotide cyclic di-AMP. In B. subtilis and other bacteria, c-di-AMP has been implicated in diverse functions such as control of metabolism, cell ...
Jan eGundlach +4 more
doaj +1 more source
IET Communications, Volume 20, Issue 1, January/December 2026.This paper investigates new radio spectrum coexistence mechanisms, leveraging the currently uninhabited 6 GHz bands and aiming for fair coexistence of Wi‐Fi 6 and 5G new radio unlicensed (NR‐U). A novel two‐stage channel contention mechanism is proposed to explore additional spectrum access opportunities which remain unrealized in the existing channel ...
Md Toufiqur Rahman +2 more
wiley +1 more source
Communication‐Security Co‐Design for Federated Learning in Grant‐Free NOMA IoT Networks
IET Communications, Volume 20, Issue 1, January/December 2026.This article presents SA‐PPO, a Security‐Aware Proximal Policy Optimisation framework for federated learning over grant‐free NOMA (non‐orthogonal multiple access) in IoT networks. By jointly optimising access control, resource allocation, and trust‐weighted aggregation using cross‐layer indicators, SA‐PPO enhances both communication reliability and ...
Emmanuel Atebawone +5 more
wiley +1 more source
SinR effect in aprE and their function in transcriptional regulation in Bacillus subtilis
, 2003 El gen aprE de Bacillus Subtilis codifica para la proteasa extracelular alcalina subtilisina, su expresión está regulada por una red compleja de activadores y represorestranscripcionales, entre los que se encuentran: SinR, SpoOA, AbrB, Hpr, Siendo SinR ...
Alejandro Sánchez González
core
Artificial Noise Aided Directional Modulation with Multilog Frequency Diverse Array
IET Communications, Volume 20, Issue 1, January/December 2026.The basic principle of the proposed AN‐DM‐MFDA system is to allocate AN to leakage sidelobes instead of uniformly transmitting on the two‐dimensional plane. Moreover, we theoretically derive the average bit error rates as well as the secrecy capacity between the legitimate receiver and eavesdropper in the developed system.
Ji Liu, Yue Xiao, Yong Wang, Xia Lei
wiley +1 more source
Secure Transmission in ISAC Systems Aided by Active STAR‐RIS
IET Communications, Volume 20, Issue 1, January/December 2026.This paper investigates the secure transmission problem in an active simultaneous transmitting and reflecting intelligent reflecting surfaces (STAR‐RIS)‐aided integrated sensing and communication downlink system. Our objective is to maximize the sum secrecy rate by jointly optimizing the base station beamforming vectors, the sensing signal covariance ...
Baofeng Ji, Xinhao Guo, Shahid Mumtaz
wiley +1 more source
Interception of Signals With Very Weak SINR
IEEE AccessTo protect our receivers against spoofing, intrusion or simply reduce interference, we proposed a multi-layered architecture which can be integrated into a receiver chain by modifying the analog and digital parts. Indeed, Our project addresses analog circuits coupled with digital approaches to immunize a radio against any intentional electromagnetic ...
Ali Mansour, Christophe Osswald
openaire +2 more sources