Results 71 to 80 of about 2,075,015 (178)
Entanglement Teleportation Through 1D Heisenberg Chain
, 2005 Information transmission of two qubits through two independent 1D Heisenberg chains as a quantum channel is analyzed. It is found that the entanglement of two spin-$\frac 12$ quantum systems is decreased during teleportation via the thermal mixed state ...
Arnesen +16 more
core +2 more sources
Superposition based direct downlink channel state information feedback method
Tongxin xuebao, 2009 A low cost, real-time feedback method for downlink channel state information （DL-CSI） was proposed. DL-CSI was superimposed with uplink user sequences （UL-US） before transmission and thus exclusive occupation of system resources could be avoided.
XU Dao-feng 1 +2 more
doaj +2 more sources
Channel state information based efficient database construction for indoor localisation
The Journal of Engineering, 2019 The popularisation of fingerprinting localisation technology has been hindered because of two major hurdles: (i) the accuracy bottleneck caused by unreliable location fingerprints and (ii) the huge effort required to construct a fingerprints database (or
Xiyan Tian, Chao Wang, Liufeng Du
doaj +1 more source
A Survey on Human Behavior Recognition Using Channel State Information
IEEE Access, 2019 Recently, device-free human behavior recognition has become a hot research topic and has achieved significant progress in the field of ubiquitous computing.
Zhengjie Wang +6 more
doaj +1 more source
Study of channel state information feedback based on artificial intelligence
Dianxin kexue, 2022 Accurate acquisition of CSI (channel state information) is the key to the performance of massive MIMO.In current communication systems, when the reciprocity of uplink and downlink is not ideal, codebook-based CSI feedback is used for downlink CSI ...
Qiuping HUANG +5 more
doaj
Rayleigh Fading Multiple Access Channel Without Channel State Information [PDF]
, 2004 In this paper we determine bounds of the capacity region of a two-user multiple-access channel with Rayleigh fading when neither the transmitters nor the receiver has channel state information (CSI). We assume that the fading coefficients as well as the additive noise are zero-mean complex Gaussian and there is an average power constraint at the ...
openaire +1 more source
Distributed Transmission Probability Control in Fading Channel with State Information
International Journal of Distributed Sensor Networks, 2015 A wireless system consisting of a finite number of heterogeneous users transmitting packets over a slotted ALOHA Rayleigh-fading channel is investigated in this paper.
S. Xie, K.S. Low, E. Gunawan
doaj +1 more source
Scientific ReportsIn earth exploration and coastal monitoring, salt-spray prediction (SSP) plays a pivotal role in assessing corrosion risks and evaluating environmental impacts on infrastructure and ecosystems. In industrial Internet of Things (IIoT) networks, SSP relies
Lincong Chen +6 more
doaj +1 more source
Performance limit of AOA-based localization using MIMO-OFDM channel state information
EURASIP Journal on Wireless Communications and Networking, 2017 Wireless communication networks are increasingly based on the ubiquitous multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) modulation scheme.
Tanee Demeechai, Pratana Kukieattikool
doaj +1 more source
Bounding and Estimating the Classical Information Rate of Quantum Channels with Memory
, 2020 We consider the scenario of classical communication over a finite-dimensional quantum channel with memory using a separable-state input ensemble and local output measurements.
Cao, Michael X., Vontobel, Pascal O.
core