Results 291 to 300 of about 14,518,071 (324)

On the Performance of Cell-Free Massive MIMO With Mixed-ADC Under Rician Fading Channels

IEEE Communications Letters, 2020
In this letter, we introduce a mixed analog-to-digital converter (ADC) receiver architecture to cell-free massive multi-input multi-output (mMIMO) system under Rician fading channels.
Yao Zhang, Meng Zhou, Haotong Cao, Longxiang Yang, Hongbo Zhu   +4 more
semanticscholar   +1 more source

Adaptive H-infinite kalman filter based on multiple fading factors and its application in unmanned underwater vehicle.

ISA transactions, 2020
Aiming at the problem that the navigation performances of unmanned underwater vehicle (UUV) may be affected by inaccurate prior navigation information and external environmental interference, which may make the accuracy and reliability of strapdown ...
Junwei Wang, Xiyuan Chen, Ping Yang
semanticscholar   +1 more source

Periodicity Fade-Out; Initiation by External Factors

1964
It was mentioned earlier that animals and plants will show an endogenous diurnal rhythm even if they have not been exposed to diurnal cycles of environmental factors during their embryonic development. One more point has to be added: very often these organisms do not show any periodicity at first, but a single stimulus is then sufficient to initiate ...
openaire   +1 more source

Performance factors for space-time trellis codes in block fading channels

2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2005
We propose the performance factors for space-time trellis codes (STTC) in block fading channels (BFC). The proposed performance factors are simpler than the conventional ones and good for the various situations: a short fading block length for a high signal-to-noise noise ratio (SNR) and a low SNR.
A. Inoue, T. Ohtsuki
openaire   +1 more source

Incorporating Fading Factors Into EKF for Space Non-Cooperative Target Tracking

2025 18th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)
Dynamic model mismatch (DMM) may occur when tracking space non-cooperative targets due to their unknown maneuvers. This can result in degraded tracking accuracy or even a complete loss of the target.
Song Li, Jiankai Huang, Yong Wang, Xia Wang   +3 more
semanticscholar   +1 more source

Theory of multipath shape factors for small-scale fading wireless channels

IEEE Transactions on Antennas and Propagation, 2000
This paper presents a new theory of multipath shape factors that greatly simplifies the description of small-scale fading statistics of a wireless receiver. A method is presented for reducing a multipath channel with arbitrary spatial complexity to three shape factors that have simple intuitive geometrical interpretations.
G.D. Durgin, T.S. Rappaport
openaire   +1 more source

Adaptive Kalman Filter with Multiple Fading Factors for UAV State Estimation

IFAC Proceedings Volumes, 2009
Abstract In general case, as an algorithm for estimating the parameters of a linear system, Kalman filter can be utilized without any problem. However, when there is a malfunction in the estimation system, the filter fails and the outputs become inaccurate.
Chingiz Hajiyev, Halil Ersin Söken
openaire   +1 more source

Cooperative NOMA Short-Packet Communications in Flat Rayleigh Fading Channels

IEEE Transactions on Vehicular Technology, 2019
A two-user downlink cooperative non-orthogonal multiple access (NOMA) short-packet communication network is investigated in flat Rayleigh fading channels, where a central user cooperatively relays the signals intended to a cell-edge user.
Xiazhi Lai, Qi Zhang, J. Qin
semanticscholar   +1 more source

Impact of random K factor on Ricean fading wireless system performance

2012 16th IEEE Mediterranean Electrotechnical Conference, 2012
In this paper we analyze performance of a wireless communication system in the case of Ricean fading environment. However, instead of commonly used fading model where only instantaneous signal to noise ratio is assumed to be random variable, whereas Ricean K factor is deterministic parameter, we examine the impact that randomly changing K factor have ...
Maja Ilic-Delibasic, Milica Pejanovic-Djurisic   +1 more
openaire   +1 more source

Frequency selective Rician fading MIMO channel and channel Rice factor estimation

2010 International Conference on Wireless Communications & Signal Processing (WCSP), 2010
In this paper, to estimate Rician frequency selective fading Multiple-Input Multiple-Output (MIMO) channels, the Shifted Scaled Least Squares (SSLS) and General form of the Linear Minimum Mean Square Error (GLMMSE) channel estimators are proposed. It is shown that these estimators achieve much better minimum possible Bayesian Cramer-Rao Lower Bounds ...
Shahriar Shirvani Moghaddam, Hamid Nooralizadeh   +1 more
openaire   +1 more source