Design and calibration of a double-directional 60 GHz channel sounder for multipath component tracking

Sun, Ruoyu; Papazian, Peter B.; Senic, Jelena; Lo, Y. T.; Choi, Jae-Kark; Remley, Kate A.; Gentile, Camillo

doi:10.23919/eucap.2017.7928270

Cited by 48 publications

(22 citation statements)

References 3 publications

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“…The phase noise has a standard deviation of 6.25°. Other details of the system are provided in [14] [31]. 3 The positional error tolerance of the table is 76 .…”

Section: A Description Of Channel Soundermentioning

confidence: 99%

“…The simulated-based verification adhered to the methodology proposed in [1] for benchmarking RF channel sounders, in which the channel sounder is represented mathematically through a system model. The model parameters were the actual PN sequence used as a probing signal distorted by the RF front ends of the T and R characterized through the backto-back method [14]. The T and R antenna patterns were characterized in an anechoic chamber, amongst others systemspecific parameters not mentioned here, to ensure accurate representation.…”

Section: B Simulation Basedmentioning

confidence: 99%

“…While virtual arrays have flexible inter-element spacing and are immune to mutual coupling, the mechanical movement implies scan durations on the order of minutes or even hoursmuch longer than the channel coherence time (the time over which the channel can be considered static)and so are suitable for sounding static environments only. Millimeter-wave channel sounders that can deal with dynamic channels either feature a real array of horns that are switched electronically [14]- [16] or a real phased-array antenna that electronically steers beams [17]- [21]. They nevertheless can take up to seconds or even minutes for a complete angular scan depending on the angular resolution and scan range, whether the scan is spherical (in azimuth and elevation), and whether the scan is doubledirectional [22] (both at the transmitter (T) and receiver (R)).…”

Section: Introductionmentioning

confidence: 99%

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Blind Calibration of Phase Drift in Millimeter-Wave Channel Sounders

et al. 2020

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Millimeter-wave channel sounders are much more sensitive to phase drift than their microwave counterparts by virtue of shorter wavelength. This matters when coherently combining untethered channel measurementsscanned over multiple antennas either electronically or mechanically in seconds, minutes, or even hoursto obtain directional information. To eliminate phase drift, a synchronization cable between the transmitter and receiver is required, limiting deployment range and flexibility indoors, and precluding most outdoor and mobile scenarios. Instead, we propose a blind technique to calibrate for phase drift by postprocessing the channel measurements; the technique is referred to as blind because it requires no reference signal and, as such, works even in non-line-of-sight conditions when the (reference) direct path goes undetected. To substantiate the technique, it was tested on real measurements collected with our 60 GHz virtual phased-array channel sounder, as well as through simulation. The technique was demonstrated robust enough to deal with the most severe case of phase drift (uniformly distributed phase) and in non-line-of-sight conditions.

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“…The phase noise has a standard deviation of 6.25°. Other details of the system are provided in [14] [31]. 3 The positional error tolerance of the table is 76 .…”

Section: A Description Of Channel Soundermentioning

confidence: 99%

Section: B Simulation Basedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Blind Calibration of Phase Drift in Millimeter-Wave Channel Sounders

et al. 2020

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“…This adds the parameters direction-of-departure (DoD) and direction-of-arrival (DoA) to the classical time-of-flight (ToF) characterization in channel sounding. While dynamic highbandwidth channel sounding is a well-established technique at frequencies of up to a few GHz [8,9], only few studies exist in the mm wave or even the THz frequency range [10][11][12][13][14]. As it turns out that the different parameters (ToF, DoA, DoD, and Doppler shift) are mutually dependent, channel sounding becomes a problem of joint multidimensional parameter estimation [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Propagation Channel Measurements in the mm- and Sub-mm Wave Range for Different Indoor Communication Scenarios

Salhi¹,

Kleine‐Ostmann

Schräder

2021

J Infrared Milli Terahz Waves

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Increasing data rates in wireless communications are accompanied with the need for new unoccupied and unregulated bandwidth in the electromagnetic spectrum. Higher carrier frequencies in the lower THz frequency range might offer the solution for future indoor wireless communication systems with data rates of 100 Gbit/s and beyond that cannot be located elsewhere. In this review, we discuss propagation channel measurements in an extremely broad frequency range from 50 to 325 GHz in selected indoor communication scenarios including kiosk downloading, office room communication, living rooms, and typical industrial environments.

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“…F IFTH generation (5G) cellular systems require high data rates which can be achieved using large bandwidths on the order of GHz [2]. The frequencies below 6 GHz are highly occupied, which makes frequencies at millimeterwave (mmWave) bands attractive due to the vast amount of unused spectrum available for 5G networks [3], [4]. Deploying wireless systems relies on accurate characterization of the statistical channel propagation in the deployment band [5].…”

Section: Introductionmentioning

confidence: 99%

Correction of Channel Sounding Clock Drift and Antenna Rotation Effects for mmWave Angular Profile Measurements

Erden

Özdemir

Khawaja

et al. 2020

IEEE Open J. Antennas Propag.

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Millimeter-wave (mmWave) bands will be used for the fifth generation communication systems to support high data rates. For the proper characterization of the mmWave propagation channel, it is essential to measure the power angulardelay profile (PADP) of the channel which includes angle-ofdeparture (AoD) and angle-of-arrival (AoA) of the multipath components (MPCs). In this paper, we first describe in detail our 28 GHz channel sounder where directional horn antennas are placed on rotating gimbals. Then, for this specific sounder class, we describe and address the following two problems in extracting the MPCs from the measurements: 1) For the channel measurements at large distances between the transmitter (TX) and the receiver (RX), it is not possible to generate the triggering signal for the TX and the RX using a single clock (SICL). This necessitates the use of separate clocks (SECLs) which introduces a random timing drift between the clocks. 2) As the positions of the antennas change during the scanning process, total distance traveled by the same MPC differs at each measurement. These two errors together cause missing some of the MPCs and detecting MPCs that do not exist in reality. We propose an algorithm to correct the clock drift and the errors in the MPC delays due to the rotation of the antennas. We compare the MPCs from the SICL measurement and the corrected SECL measurements using a Hungarian algorithm based MPC matching method. We show that the percentage of the matched MPCs increases from 28.36% to 74.13% after the correction process.Index Terms-28 GHz, channel sounding, clock drift, Hungarian algorithm, millimeter-wave (mmWave), multipath component (MPC).

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Design and calibration of a double-directional 60 GHz channel sounder for multipath component tracking

Cited by 48 publications

References 3 publications

Blind Calibration of Phase Drift in Millimeter-Wave Channel Sounders

Blind Calibration of Phase Drift in Millimeter-Wave Channel Sounders

Propagation Channel Measurements in the mm- and Sub-mm Wave Range for Different Indoor Communication Scenarios

Correction of Channel Sounding Clock Drift and Antenna Rotation Effects for mmWave Angular Profile Measurements

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