Near-field BER and EVM Measurement at 5.8 GHz in Mode-stirred Metal Enclosure

Lodro, Mir; Smart, Chris; Gradoni, Gabriele; Vuković, Ana; Thomas, Dave; Greedy, Steve

doi:10.47037/2020.aces.j.350915

Cited by 4 publications

(5 citation statements)

References 16 publications

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“…In ref. [12], the study was centred around evaluating the OTA performance, assessing the bit error rate (BER), and conducting EVM measurements within a metal enclosure. They also investigated the effects of modulation type and the position of RF absorbers on BER and EVM levels during image transmission in ref.…”

Section: Introductionmentioning

confidence: 99%

OTA testing of near‐field and far‐field communication links

Korunur Engiz,

Lodro,

Greedy

et al. 2023

Electronics Letters

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In this work, near‐field and far‐field link measurement in metal enclosure environment is performed. The performance of near‐field and far‐field links are assessed using key performance indicators such as error vector magnitude, bit error rate, and signal‐to‐noise ratio. The metal enclosure is placed in an anechoic chamber, ensuring a stationary measurement environment. There are no external interference sources and the results are a function of near‐field and far‐field scenarios and hardware impairments. In measurements, software‐defined radios used for the transmission and reception of image data using the long‐term evolution‐advanced physical layer. Based on the results of the study, an optimum gain region can be determined where better key performance indicators are achieved. Furthermore, the frequency selectivity of the channel is reduced within the determined optimum gain region, leading to an improvement in the system's performance.

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Section: Introductionmentioning

confidence: 99%

OTA testing of near‐field and far‐field communication links

Korunur Engiz,

Lodro,

Greedy

et al. 2023

Electronics Letters

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“…Wireless communication system deployment in highly reflective and complex propagation environments, such as in a metal enclosure or a compact box environment, is extremely challenging [1,2]. Near-field MIMO for high-data-rate communication is important for applications, such as wireless chip-to-chip communications and wireless network-on-chip (WNoC) [2][3][4][5][6][7]. Traditionally, near-field communication was used for short-range, low-rate, and power-constraint applications using magnetically coupled loop antennas [8].…”

Section: Introductionmentioning

confidence: 99%

“…The near-field MIMO communication scenarios in the presence of rich scattering may arise in different applications, such as the industry environment, animal cages [16], ICT equipment [17], kiosks [18], computer chassis [19], metal cabinets [20], and wireless inter-board communication [21,22]. We previously presented over-the-air (OTA) testing of a QPSK receiver for the performance of baseband receiver design stages and the measurements were performed in a metal enclosure with all baseband receiver design stages [2]. In [1], we conducted near-field EVM measurements in a metal enclosure using a single transmit and a single receive antenna.…”

Section: Introductionmentioning

confidence: 99%

Compact MIMO System Performances in Metallic Enclosures

et al. 2022

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In this work, we present a 2 × 2 near-field multi-input multiple-output (MIMO) prototype for bit-error-rate (BER) and error vector magnitude (EVM) measurements in a metal enclosure. The near-field MIMO prototype was developed using software-defined-radios (SDRs) for over-the-air transmission of QPSK modulated baseband waveforms. We checked the near-field MIMO BER and EVM measurements in three different scenarios in a highly reflecting metal enclosure environment. In the first scenario, the line-of-sight (LOS) communication link was investigated when the mode stirrer was stationary. In the stationary channel conditions, near-field MIMO BER and EVM measurements are performed. In the second scenario, BER and EVM measurements were performed in dynamic channel conditions when the mode stirrer was set to move continuously. In the third scenario, LOS communication near-field MIMO BER and EVM measurements were performed in stationary channel conditions but now in the presence of MIMO interference. In three different scenarios, near-field MIMO BER and EVM measurements were investigated at different Tx USRP gain values and in the presence of varying levels of MIMO interference.

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“…The AGC can be configured in slow-attack mode or fast-attack mode to track the received signal. Previously, we have recorded our experimental experience with AGC in the metal enclosure Lodro et al (2020). The AGC helps for coarse and fine frequency correction in the baseband receiver.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Intelligent Surface-Assisted Bluetooth Low Energy Link in Metal Enclosure

et al. 2021

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Reconfigurable intelligent surface (RIS) technology is at the forefront for its transformative role in future wireless communication systems such as wireless local area networks (WLAN), sixth-generation (6G) communication, and internet-of-things (IoT). This paper presents RIS-assisted Bluetooth low energy (BLE) communication links in neighbor discovery mode. We optimized the packet error rate (PER) performance of the BLE communication link in a highly reflecting metal enclosure environment. We used one RIS for the PER optimization of four BLE physical (PHY) modes. Then, we used two RISs simultaneously in a distributed and centralized manner to further optimize the PER of all BLE PHY modes. We found PER optimization using two RISs is better than the PER optimization using one RIS. Additionally, PER optimization using a centralized arrangement of RISs outperformed PER optimization using distributed arrangement. We found the coded BLE modes i.e., LE500K and LE125K show lower PER than the uncoded counterpart i.e., LE1M and LE2M. This is because uncoded BLE PHY modes have higher data rates than the coded BLE PHY modes. Because of additional channel power gains introduced by RIS-based passive beamforming, the PER of coded and uncoded BLE PHY modes is further reduced.

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Near-field BER and EVM Measurement at 5.8 GHz in Mode-stirred Metal Enclosure

Cited by 4 publications

References 16 publications

OTA testing of near‐field and far‐field communication links

OTA testing of near‐field and far‐field communication links

Compact MIMO System Performances in Metallic Enclosures

Reconfigurable Intelligent Surface-Assisted Bluetooth Low Energy Link in Metal Enclosure

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