Low Probability of Interception Signal Transmission Based on 4D Antenna Arrays

High-precision and fast relative positioning of a large number of mobile sensor nodes (MSNs) is crucial for smart industrial wireless sensor networks (SIWSNs). However, positioning multiple targets simultaneously in three-dimensional (3D) space has been less explored. In this paper, we propose a new approach, called Angle-of-Arrival (AOA) based Three-dimensional Multi-target Localization (ATML). The approach utilizes two anchor nodes (ANs) with antenna arrays to receive the spread spectrum signals broadcast by MSNs. We design a multi-target single-input-multiple-output (MT-SIMO) signal transmission scheme and a simple iterative maximum likelihood estimator (MLE) to estimate the 2D AOAs of multiple MSNs simultaneously. We further adopt the skew line theorem of 3D geometry to mitigate the AOA estimation errors in determining locations. We have conducted extensive simulations and also developed a testbed of the proposed ATML. The numerical and field experiment results have verified that the proposed ATML can locate multiple MSNs simultaneously with high accuracy and efficiency by exploiting the spread spectrum gain and antenna array gain. The ATML scheme does not require extra hardware or synchronization among nodes, and has good capability in mitigating interference and multipath effect in complicated industrial environments.

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Spacecraft Formation Orbit Estimation Using WLPS-Based Localization

International Journal of Navigation and Observation ◽

10.1155/2011/654057 ◽

2011 ◽

Vol 2011 ◽

pp. 1-12 ◽

Cited By ~ 3

Author(s):

Shu Ting Goh ◽

Ossama Abdelkhalik ◽

Seyed A. (Reza) Zekavat

Keyword(s):

Antenna Arrays ◽

High Performance ◽

Signal Transmission ◽

Base Station ◽

Position Estimation ◽

Absolute Position ◽

Coverage Area ◽

Spacecraft Formation ◽

Spacecraft Formation Flying ◽

Local Positioning System

This paper studies the implementation of a novel wireless local positioning system (WLPS) for spacecraft formation flying to maintain high-performance spacecraft relative and absolute position estimation. A WLPS equipped with antenna arrays allows each spacecraft to measure the relative range and coordinate angle(s) of other spacecraft located in its coverage area. The dynamic base station and the transponder of WLPS enable spacecraft to localize each other in the formation. Because the signal travels roundtrip in WLPS, and due to the high spacecraft velocities, the signal transmission time delay reduces the localization performance. This work studies spacecraft formation positions estimation performance assuming that only WLPS is available onboard. The feasibility of estimating the spacecraft absolute position using only one-dimensional antenna array is also investigated. The effect of including GPS measurements in addition to WLPS is studied and compared to a GPS standalone system.

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DIGITAL ANTENNA ARRAYS SIMULATION

Chronos: natural and technical sciences ◽

10.52013/2712-9691-36-3-4 ◽

2021 ◽

Vol 6 (3(36)) ◽

pp. 13-17

Author(s):

Yuriy Borisovich Nechaev ◽

Ilya Vladimirovich Peshkov ◽

Natalia Alexandrovna Fortunova ◽

Irina Nikolaevna Zaitseva

Keyword(s):

Simulation Model ◽

Antenna Array ◽

Antenna Arrays ◽

Signal Transmission ◽

Transmission Systems ◽

Digital Radio ◽

Initial Information ◽

Information Signal ◽

Broadband Signal ◽

Radio Systems

The article describes a simulation model of a digital antenna array, which can be used in broadband signal transmission systems under the influence of broadband interference. The initial information signal has a speed of 19200 bit / s for the I and Q stream. It is proved that the signal level after applying the diagramming of a digital antenna array is four times higher than the signal level without its use, which confirms the advantage of digital radio systems.

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Parametric codebook design for efficient signal transmission using uniform circular arrays

EURASIP Journal on Wireless Communications and Networking ◽

10.1186/s13638-021-02066-3 ◽

2021 ◽

Vol 2021 (1) ◽

Author(s):

Junsik Shin ◽

Junyeub Suh ◽

Sangchun Park ◽

Wonjin Sung

Keyword(s):

Antenna Arrays ◽

Channel Model ◽

Mimo Systems ◽

Signal Transmission ◽

Multiple Input Multiple Output ◽

Base Station ◽

Step Size ◽

Codebook Design ◽

Construction Methods ◽

Planar Array

AbstractIn order to improve the quality of the received signal and system spectral efficiency, accurate beamforming using a given antenna array is essential for multiple-input multiple-output (MIMO) systems. To obtain desired MIMO transmission performance, construction of codebooks which are composed of matching beamforming vectors to the array structure is important. To effectively cover different types of mobile traffic, the base station for 5G new radio employs antenna arrays in various sizes and shapes. Nevertheless, the codebooks adopted by the 3GPP standard so far are based on the uniform linear array and the uniform planar array, necessitating design techniques for a wider class of antenna arrays. In this paper, we propose codebook construction methods for the uniform circular array with parameters to flexibly set the initial phase and step size based on the channel characteristics of the user equipment (UE). When tested over the 3GPP spatial channel model, the proposed codebooks show a substantial amount of gain over the conventional codebooks in all UE locations within the cell.

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