Three-Dimensional Angle of Arrival Estimation in Dynamic Indoor Terahertz Channels Using a Forward–Backward Algorithm

A novel angle-of-arrival (AoA) estimation method for both azimuth and elevation based on Bayesian inference and statistical state transition probabilities is presented for the dynamic indoor terahertz (THz) channel. A precise AoA estimation is crucial for the deployment of a directive antenna, which...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology Vol. 66; no. 5; pp. 3798 - 3811
Main Authors: Peng, Bile, Kurner, Thomas
Format: Journal Article
Language:English
Published: New York IEEE 01.05.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Angle of arrival
Angle-of-arrival (AoA) estimation
Azimuth
Background radiation
Bayes methods
Bayesian analysis
Bayesian inference
Channel estimation
Computer simulation
Data transmission
Directive antennas
Estimation
forward–backward algorithm
Heuristic algorithms
human blockage
Human motion
Inference algorithms
Markov analysis
Markov processes
Probabilistic inference
Statistical inference
terahertz (THz) communication
Transition probabilities
ISSN:0018-9545, 1939-9359
Online Access:Get full text
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Summary:A novel angle-of-arrival (AoA) estimation method for both azimuth and elevation based on Bayesian inference and statistical state transition probabilities is presented for the dynamic indoor terahertz (THz) channel. A precise AoA estimation is crucial for the deployment of a directive antenna, which can compensate for the high path loss and reduce the intersymbol interference. In many application scenarios, the user equipment is moved by the user during the data transmission, and the AoA is not constant. The novel algorithm exploits the fact that the AoA movement can be represented as a Markov process and that the Bayesian inference can be used to combine the likelihood and a priori information to provide a more precise estimate than using the likelihood alone. An indoor human movement model is developed to generate the realistic application scenario and obtain the statistical transition probabilities. The forward-backward algorithm is implemented to carry out the Bayesian inference. The algorithm performance is illustrated using the channel models generated by a ray launching simulator. The background log-likelihood is suggested to adapt the algorithm to the instant channel state change in a multipath environment.
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2016.2599488