Theoretical and Practical Evaluation of an Overlay Multi-band Front-end

Rügamer, Alexander; Merwe, J. Rossouw van der; Cortés, Iñigo; Felber, Wolfgang

doi:10.1109/plans46316.2020.9110188

Cited by 2 publications

(1 citation statement)

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“…Recent work has considered the concurrent reception of multiple narrowband signals in GNSS (global navigation satellite system) receivers. In [8], the authors designed a reconfigurable, dual-band, multistandard RF subsampling GNSS receiver whereas in [9] a direct RF subsampling receiver using a common subsampling IF is designed by exploiting the decorrelation of the GNSS spreading codes. However, direct RF subsampling still requires the ADC to respond to the system full RF bandwidth while the procedure to select appropriate subsampling IFs for wideband channels is not readily computable.…”

Section: Introductionmentioning

confidence: 99%

The effect of ADC resolution on concurrent, multiband, direct RF sampling receivers

Henthorn

Mohammadkhani

O’Farrell

et al. 2021

2021 IEEE Global Communications Conference (GLOBECOM)

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Connectivity using interband frequencies in 4G and 5G radio access networks, for example, carrier aggregation or dual-connectivity, incurs high receiver complexity and power consumption, in particular, when implemented using multiple radio units. Employing concurrent, multiband, direct RF sampling in a single radio chain architecture reduces the RF component count, leading to lower receiver complexity and power consumption. For this architecture, as the composite signal from multiple concurrent bands is digitized by a common analogue-to-digital converter (ADC), the bit resolution critically affects system performance. In this paper, the effect of ADC resolution on the error vector magnitude (EVM) and Block Error Rate (BLER) performance of a concurrent, multiband, direct RF sampling receiver is investigated. Simulation and hardware measurement of a tri-band Long Term Evolution (LTE) system supporting three simultaneously active channels at 888 MHz, 1.92 GHz and 2.52 GHz is evaluated when reducing the ADC resolution from 8 to 3 bits. Interband interference measurements demonstrate that the multiband, direct RF sampling, wideband LTE receiver remains 3GPP compliant at 4-bit ADC resolution with the signalto-noise-ratio (SNR) desensitization over a single-band receiver limited to 9 dB in the 888 MHz band.

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Section: Introductionmentioning

confidence: 99%

The effect of ADC resolution on concurrent, multiband, direct RF sampling receivers

Henthorn

Mohammadkhani

O’Farrell

et al. 2021

2021 IEEE Global Communications Conference (GLOBECOM)

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show abstract

Advanced and versatile signal conditioning for GNSS receivers using the high‐rate DFT‐based data manipulator (HDDM)

et al. 2021

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Proper signal conditioning is crucial for reliable Global Navigation Satellite System (GNSS) navigation. Signal conditioning includes correcting receiver front-end distortions, shaping noise, removing interferences, and altering the received signal. The high-rate DFT-based data manipulator (HDDM) is a versatile signal processing architecture based on the Discrete Fourier Transform (DFT). In this article, the HDDM is theoretically modeled, analyzed, and evaluated. Some applications are presented, including interference mitigation, spectrum reconstruction, overlay signal design, altering signal modulations, and signal equalization. Additionally, the complexity of one concrete hardware implementation is investigated. The HDDM has shown excellent results with interference mitigation, and it can simultaneously achieve other signal conditioning tasks. Processing several tasks with the same nested architecture provides a significant processing benefit compared to discrete processing architectures. It emphasizes the benefits of a single architecture to simultaneously address several signal condition tasks, as opposed to separate structures requiring significantly more processing or poorer synergy.

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Theoretical and Practical Evaluation of an Overlay Multi-band Front-end

Cited by 2 publications

References 6 publications

The effect of ADC resolution on concurrent, multiband, direct RF sampling receivers

The effect of ADC resolution on concurrent, multiband, direct RF sampling receivers

Advanced and versatile signal conditioning for GNSS receivers using the high‐rate DFT‐based data manipulator (HDDM)

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