Ambiguity-Resistant Three- and Four-Channel Interferometers

Goodwin, Robert

doi:10.21236/adb014135

Cited by 26 publications

(19 citation statements)

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“…This method provides the phase error for the three-element array. Another method to obtain the three-element array spacing was provided by Goodwin [25]. The array spacing is = /2.…”

Section: Methods For Obtaining Multiple Element Arrays Formentioning

confidence: 99%

“…Array configurations for a three-element interferometer with two different baselines are shown in Figure 1. The arrays may be classified according to the channel used for phase reference [25]. If the first channel is the reference for the other channel, the array is called endphase left, as shown in Figure 1(a).…”

Section: Array Configuration For Interferometer Df System Withmentioning

confidence: 99%

“…This can be obtained using simulations for algorithms such as the cosine-function [30], least-squares, and correlation-coefficient methods to estimate the DOA [31]. Another way to obtain the probability of ambiguity is to use the channel pair RMS phase error of Goodwin [25] or the distance between phase difference lines, as in the work of Lee and Woo [32]. The former requires a simulation whenever the array spacing is selected, but the latter can select the array spacing to satisfy the requirement based on the probability of ambiguity.…”

Section: Probability Of Ambiguity For Interferometer Df Systemmentioning

confidence: 99%

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Practical Consideration Factors to Design Array Configuration of Direction Finding System for Airborne Signal Intelligence

Lee

Joo

Kim

et al. 2018

Security and Communication Networks

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Airborne signal intelligence (SIGINT) systems must be capable of locating radio signal sources. Direction finding (DF) to support this capability is an important factor. There are some practical considerations to be taken when designing the array configuration of a DF system for airborne SIGINT systems. This paper summarizes the practical factors when designing the array configuration of the DF system for airborne SIGINT. In particular, it focuses on four areas: antenna consideration factors when installing the DF system for airborne SIGINT from a practical point of view, array configuration methods for airborne communications intelligence and electronic intelligence, and a numerical analysis to select the optimum antenna position for airborne SIGINT.

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“…This method provides the phase error for the three-element array. Another method to obtain the three-element array spacing was provided by Goodwin [25]. The array spacing is = /2.…”

Section: Methods For Obtaining Multiple Element Arrays Formentioning

confidence: 99%

Section: Array Configuration For Interferometer Df System Withmentioning

confidence: 99%

Section: Probability Of Ambiguity For Interferometer Df Systemmentioning

confidence: 99%

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Practical Consideration Factors to Design Array Configuration of Direction Finding System for Airborne Signal Intelligence

Lee

Joo

Kim

et al. 2018

Security and Communication Networks

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“…When kd 2: 27r, a cannot be uniquely determined by the measured cpl because multiple values of a can give the same 01. It is possible to unambiguously determine a if multiple channel interferometers are suitably designed [3,4]. One can also uniquely determine a from Eq.…”

Section: Determination Of Target Directionmentioning

confidence: 99%

Target direction determination employing widely-spaced high resolution radars

Wang

1995

Journal of Electromagnetic Waves and Applications

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“…Since the typical required SNR for a phase interferometer in EW applications is 14-18 dB [1], the SNR was selected as 10, 13 and 16 dB. When the set of array spacing for the four-element array was d 1 = 3l, d 2 = 4l, and d 3 = 7.5l, the DF ambiguity probability at SNR = 13 dB was about 0.04% for [3], about 0.08% for simulations, and about 0.1% for the proposed method (Fig. 5).…”

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confidence: 99%

Approximate analysis of DF ambiguity probabilities for an interferometer direction‐finding system using gamma distributions

Lee

Ryu

et al. 2019

Electron. lett.

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To obtain high direction-finding (DF) accuracy in electronic warfare applications, it is necessary to maximise the number of effective data points with a small angle-of-arrival error. Thus, a method to obtain the DF ambiguity probability for the selected set of array spacing is required. In this Letter, a novel method to obtain DF ambiguity probabilities for four-and five-element arrays by using gamma distributions is presented. The DF ambiguity probability obtained by the proposed method for the five-element array was in good agreement with the results of simulations. For the four-element array, the proposed method produced data that showed approximate agreement with the results of simulations. Thus, the proposed method should be useful for future applications.

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Ambiguity-Resistant Three- and Four-Channel Interferometers

Cited by 26 publications

References 0 publications

Practical Consideration Factors to Design Array Configuration of Direction Finding System for Airborne Signal Intelligence

Practical Consideration Factors to Design Array Configuration of Direction Finding System for Airborne Signal Intelligence

Target direction determination employing widely-spaced high resolution radars

Approximate analysis of DF ambiguity probabilities for an interferometer direction‐finding system using gamma distributions

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