Impact of channel sounder phase noise on directional channel estimation by space-alternating generalised expectation maximisation

Taparugssanagorn, Attaphongse; Alatossava, M.; Holappa, V.-M.; Ylitalo, J.

doi:10.1049/iet-map:20070001

Cited by 8 publications

(4 citation statements)

References 1 publication

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“…To this aim, more complex and accurate spectral methods may be used, e.g. the multiple signal classification [50–52], estimation of subspace rotational invariance technology [52, 53], space‐alternating generalised expectation‐maximisation [54, 55], sparse power angle spectrum estimation [56], CLEAN [57], or algorithm based on the exponential frequency correlation function [58].…”

Section: Fundamentals Of Doppler Navigationmentioning

confidence: 99%

Doppler‐based navigation for mobile protection system of strategic maritime facilities in GNSS jamming and spoofing conditions

Ziółkowski¹,

Kelner²

2020

IET Radar, Sonar & Navigation

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Section: Fundamentals Of Doppler Navigationmentioning

confidence: 99%

Doppler‐based navigation for mobile protection system of strategic maritime facilities in GNSS jamming and spoofing conditions

Ziółkowski¹,

Kelner²

2020

IET Radar, Sonar & Navigation

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“…In practice, different methods are used to realize this aim. These methods include signal processing techniques such as MUltiple SIgnal Classification (MUSIC) [1][2][3][4][5][6][7][8], Estimation of Signal Parameter via Rotational Invariance Techniques (ESPRIT) [4,[9][10][11], Space-Alternating Generalized Expectation-maximization (SAGE) [12][13][14], Sparse Power Angle Spectrum Estimation (SPASE) [15], and CLEAN [16]. However, none of these methods ensures minimization of the environmental impact on the DF accuracy.…”

Section: Introductionmentioning

confidence: 99%

Radio bearing of sources with directional antennas in urban environment

Ziółkowski

Kelner

2018

Int. J. Microw. Wireless Technol.

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This paper focuses on assessing the limitations in the direction-finding process of radio sources with directional antennas in an urbanized environment, demonstrating how signal source antenna parameters, such as beamwidth and maximum radiation direction affect bearing accuracy in non-line-of-sight (NLOS) conditions. These evaluations are based on simulation studies, which use measurement-tested signal processing procedures. These procedures are based on a multi-elliptical propagation model, the geometry of which is related to the environment by the power delay profile or spectrum. The probability density function of the angle of arrival for different parameters of the transmitting antenna is the simulation result. This characteristic allows assessing the effect of the signal source antenna parameters on bearing error. The obtained results are the basis for practical correction bearing error and these show the possibility of improving the efficiency of the radio source location in the urbanized environment. (SPASE) [15], and CLEAN [16]. However, none of these methods ensures minimization of the environmental impact on the DF accuracy. Knowledge of statistical properties of AOA is the basis for developing procedures to minimize bearing error. The use of measurement data for this purpose does not allow the assessment of the full range of propagation scenarios. Therefore, it is appropriate to use practically verified simulation tests.Available literature describes only simplified ways of modelling antenna patterns, and most of these examples use the omnidirectional pattern. In this paper, the evaluation of the angular dispersion is based on simulation studies that consider the wide range of propagation phenomena occurring in the urbanized environment. The procedure provides for the generation of the set of the angles and powers of the propagation paths at Rx. This set considers the influence of the power radiation pattern of the transmitter (Tx) antenna on the AOA dispersion. This generation procedure is based on a multi-elliptical propagation model, which is presented by the authors, i.a., in [17][18][19][20][21][22]. The model maps the effects of propagation phenomena that dominate in the azimuth plane. In practice, this means that the analysis concerns transmitting antennas that the power radiation pattern is narrow in the elevation plane.The purpose of this paper is to present the impact of the beamwidth and the main lobe direction of the transmitting antenna pattern on the angular dispersion of propagation paths at Rx, which determines the accuracy of the DF procedure. This is an important issue in the context of urbanized environments. The problem of assessing the impact of the environment on the accuracy of the DF procedure is presented by the authors in [23]. However, in that case, the analysis concerns emission sources with omni-directional antennas. Considering the directional antenna parameters and the use of statistical characteristic asymmetries of AOA for error correction is a significant extension of ...

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“…A lot of work has been done in multipath channel sounding and channel characterization [2][3][4][5] with high-accuracy measurements [6,7]. They achieve amazing delay resolutions and spatial resolutions by conducting broadband measurements with highly directional antennas.…”

Section: Introductionmentioning

confidence: 99%

Channel Measurement Based Antenna Synthesis for Mobile Automotive Mimo Communication Systems

Mahler¹,

Kowalewski²,

Nub³

et al. 2017

PIER B

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Abstract-In this paper a multiple input multiple output (MIMO) radio channel measurement system is presented that utilizes several software defined radio (SDR) platforms at the transmitter and at the receiver. The system hardware buildup and its calibration technique are presented. The channel measurement results are afterwards exploited for a special antenna synthesis method that was already proofed by raytracing channel simulations. The antenna synthesis method is applied to a mobile single and to a mobile multiple channel receiver. The resulting synthesized antenna systems are evaluated in terms of antenna radiation patterns and the corresponding channel capacities. The results reveal the superiority of synthesized antenna systems compared to conventional omnidirectional antenna systems in the considered urban street scenario. Moreover, the findings from the antenna synthesis based on dynamically measured MIMO radio channels confirm the results from the raytracing channel simulation based antenna synthesis.

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Impact of channel sounder phase noise on directional channel estimation by space-alternating generalised expectation maximisation

Cited by 8 publications

References 1 publication

Doppler‐based navigation for mobile protection system of strategic maritime facilities in GNSS jamming and spoofing conditions

Doppler‐based navigation for mobile protection system of strategic maritime facilities in GNSS jamming and spoofing conditions

Radio bearing of sources with directional antennas in urban environment

Channel Measurement Based Antenna Synthesis for Mobile Automotive Mimo Communication Systems

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