Enabling Situational Awareness in Millimeter Wave Massive MIMO Systems

Mendrzik, Rico; Meyer, Florian; Bauch, Gerhard; Win, Moe Z.

doi:10.1109/jstsp.2019.2933142

Cited by 102 publications

(84 citation statements)

References 61 publications

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“…We use the EFIMs (21) and (24) to get a closed-form solution for (37), in order to obtain an insightful formulation. To make use of the EFIMs, it is beneficial to define subsets of the Jacobian from (35) that contain only the position-related parameters described by…”

Section: Peb Using Efimmentioning

confidence: 99%

“…The works in [16], [17] consider the impact of estimating these map features on the Fisher information of the position and orientation error. In [20]- [24], simultaneous localization and mapping algorithms are presented that estimate the environment map from consecutive measurements, achieving accurate and robust position tracking of a mobile agent in challenging indoor environments. In [8], [25], the use of mm-wave antenna arrays was discussed for multipath-based indoor positioning.…”

Section: Introduction a Motivation And State Of The Artmentioning

confidence: 99%

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Single-Anchor Positioning: Multipath Processing With Non-Coherent Directional Measurements

et al. 2020

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High-accuracy indoor radio positioning can be achieved by using (ultra) wideband (UWB) radio signals. Multiple fixed anchor nodes are needed to compute the position or alternatively, specular multipath components (SMCs) extracted from radio signals can be exploited. In this work, we study a multipath-based, single-anchor positioning system that acquires directional measurements non-coherently. These non-coherent measurements can be obtained, e.g., from a single-chain mm-wave transceiver with analog beam steering or from a low-complexity ultra-wideband transceiver with switched directional antennas. The directional antennas support the separation of SMCs and the suppression of the undesired diffuse multipath component (DMC) with the benefit that the required signal bandwidth can be drastically reduced. The paper analyzes the Cramér-Rao lower bound (CRLB) on the position estimation error to gain insight in the influence of the system design parameters as well as the impact of the DMC on the position error. The CRLB is compared between the non-coherent antenna setup, a conventional array with coherent processing, and a single-antenna setup. A maximum-likelihood position estimation algorithm is formulated. Its performance is evaluated with synthetically generated data as well as with UWB measurements. We show that the accuracy and robustness are significantly improved due to the processing of angular information. Analyzing the measured data for a line-of-sight link, the median error decreases from 22 down to 7 cm, the measurements better than 20 cm increase from 46 to 95 %, and outliers above 50 cm reduce from 12 to 0 %. INDEX TERMS Radio positioning, single-anchor, Fisher information, position error bound, directional antenna, multipath component, non-coherent array processing.

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Section: Peb Using Efimmentioning

confidence: 99%

Section: Introduction a Motivation And State Of The Artmentioning

confidence: 99%

Single-Anchor Positioning: Multipath Processing With Non-Coherent Directional Measurements

et al. 2020

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“…The operation at high carrier frequencies leads to sparse communication channels, further amplified by the use of directional beamforming [3]- [5]. These properties are also conducive for mapping, which is the determination of locations and properties of landmarks in the environment [6]. There is a rich literature on simultaneous localization and mapping (SLAM) in general [7]- [9] and more recently in radio-based SLAM in particular [10]- [12].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Detection Probability for mmWave 5G SLAM

Wymeersch

Seco‐Granados

2020

2020 2nd 6G Wireless Summit (6G SUMMIT)

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In 5G simultaneous localization and mapping (SLAM), estimates of angles and delays of mmWave channels are used to localize the user equipment and map the environment. The interface from the channel estimator to the SLAM method, which was previously limited to the channel parameters estimates and their uncertainties, is here augmented to include the detection probabilities of hypothesized landmarks, given certain a user location. These detection probabilities are used during data association and measurement update, which are important steps in any SLAM method. Due to the nature of mmWave communication, these detection probabilities depend on the physical layer signal parameters, including beamforming, precoding, bandwidth, observation time, etc. In this paper, we derive these detection probabilities for different deterministic and stochastic channel models and highlight the importance of beamforming.

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“…SAL is one of the current development trends due to its low infrastructure requirement. Localizing agents using a single anchor are usually assisted by MPCs [37] or an antenna array [38] based on time-of-arrival (TOA) and AOA measurements. In particular, the antenna array can be used to obtain high-accuracy angle estimation based on phase-difference-of-arrival (PDOA) of the signals [39][40][41][42], which translates to high-accuracy localization of the agents.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Single-Anchor Localization Method Using Ultra-Wide Bandwidth Systems

2019

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Ultra-wideband technology has the merits of high temporal resolution and stability, and it has been widely used for high-accuracy localization and tracking. However, most ultra-wideband localization systems need multiple anchors for trilateration, which results in high system cost, large messages overhead, and insufficient extraction of information. In this paper, we propose a single-anchor localization (SAL) mehtod that achieves high-accuracy multi-agent localization with high efficiency. In the proposed method, the anchor broadcasts the first two messages and then each agent responds one message to the anchor (quasi-)simultaneously. Based on the received message with superpositioned agent responses, the time-of-flight and angle-of-arrival information from all agents to the anchor can be extracted altogether. We implement the localization system in two indoor environments, and show that the proposed method can achieve decimeter-level accuracy for multiple agents using three messages. Our method provides design guidelines for high-accuracy and high-efficiency multi-agent localization systems.

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Enabling Situational Awareness in Millimeter Wave Massive MIMO Systems

Cited by 102 publications

References 61 publications

Single-Anchor Positioning: Multipath Processing With Non-Coherent Directional Measurements

Single-Anchor Positioning: Multipath Processing With Non-Coherent Directional Measurements

Adaptive Detection Probability for mmWave 5G SLAM

An Efficient Single-Anchor Localization Method Using Ultra-Wide Bandwidth Systems

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