Intelligent Analog Beam Selection and Beamspace Channel Tracking in THz Massive MIMO with Lens Antenna Array
نویسندگان
چکیده
Beamspace multiple-input-multiple-output (MIMO) as a green technology can efficiently substitute for the conventional massive MIMO, provided that beamspace channel is acquired precisely. The prior efforts in this area of study, especially learning-driven ones, however, indicate remarkable performance losses owing to lack generalization. In paper, we propose modified non-linear auto-regressive exogenous (NARX) model tracking and predicting over sequences time. Benefiting from bounded generalization error, fast convergence, limited prediction variance, negligible loss, proposed scheme achieves up 15% spectral efficiency (SE) gain its counterparts. We further improve by means an ensemble learning technique simultaneously training multiple NARX modules parallel, thus leading 23% SE gain. Relying on predicted channel, analog beam selection through fine-tuning architecture pre-trained off-the-shelf GoogleNet, which brings 21% similar baselines. With aid technique, it indicated numerically 34% improvement be achieved, compared
منابع مشابه
The Maximal SINR Selection Mode for 5G Millimeter- Wave MIMO: Model Systems and Analysis
In mmWave massive MIMO systems, the lens antenna array and beam selection by beamspace MIMO are employed to target the number of required RF chains reduced without obvious performance loss. For cost – effective, the number of RF chain is an allowable limitation, however, to obtain the nearoptimal capacity efficiently, beam selection must require the exact information of the wide size of beamspa...
متن کاملDesign and Fabrication of Plasma Array Antenna with Beam Forming
In this paper, the design and implementation of plasma antenna array with beam forming is discussed. The structure consists of a circular array of plasma tube enclosed in a unipolar UHF band monopole antenna. Beam forming is possible by stimulated plasma tubes. The combination of the above antenna with plasma excitation controller makes a beam forming smart antenna. An experimental model in UHF...
متن کاملBeam Domain Optical Wireless Massive MIMO Communications with Transmit Lens
We present beam domain optical wireless massive multiple-input multiple-output communications, where base station with massive transmitters communicates with a number of user terminals through transmit lens simultaneously. We focus on LED transmitters, and provide an optical channel model, where the light emitted from one LED passes through the transmit lens and generates a narrow beam. Based o...
متن کاملFDD Massive MIMO Channel Estimation with Arbitrary 2D-Array Geometry
This paper addresses the problem of downlink channel estimation in frequency-division duplexing (FDD) massive multiple-input multiple-output (MIMO) systems. The existing methods usually exploit hidden sparsity under a discrete Fourier transform (DFT) basis to estimate the cdownlink channel. However, there are at least two shortcomings of these DFT-based methods: 1) they are applicable to unifor...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Cognitive Communications and Networking
سال: 2023
ISSN: ['2332-7731', '2372-2045']
DOI: https://doi.org/10.1109/tccn.2023.3247756