Cascaded noise figure calculations for radio receiver circuits with noise-aliasing properties

Pekau, H.; Haslett, J.W.

doi:10.1049/ip-cds:20060023

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…For the system a power amplification as well as attenuation are beneficial in order to improve the signal-to-noise ratio (SNR) and attenuate the signal during the ISL, respectively as well as attenuation are beneficial in order to improve the SNR and attenuate the signal during the ISL, respectively. However, to get the best possible noise behavior it is important to stick to the order of components in the signal chain that can be received from the so-called Friis-equation [28]: For the system, a power amplification as well as attenuation are beneficial in order to improve the signal-to-noise ratio (SNR) and attenuate the signal during the ISL, respectively. However, to get the best possible noise behavior, it is important to stick to the order of components in the signal chain that can be received from the so-called Friis-equation [28]:…”

Section: Rf-section and Link Budgetmentioning

confidence: 99%

“…For the system, a power amplification as well as attenuation are beneficial in order to improve the signal-to-noise ratio (SNR) and attenuate the signal during the ISL, respectively. However, to get the best possible noise behavior, it is important to stick to the order of components in the signal chain that can be received from the so-called Friis-equation [ 28 ]:

…”

Section: Prototypementioning

confidence: 99%

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Miniaturized Hybrid Frequency Reader for Contactless Measurement Scenarios Using Resonant Surface Acoustic Wave Sensors

Scheiner

Probst

Michler

et al. 2021

Sensors

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Due to higher automation and predictive maintenance, it becomes more and more important to acquire as many data as possible during industrial processes. However, many scenarios require remote sensing since either moving parts would result in wear and tear of cables or harsh environments prevent a wired connection. In the last few years, resonant surface acoustic wave (SAW) sensors have promised the possibility to be interrogable wirelessly which showed very good results in first studies. Therefore, the sensor’s resonance frequency shifts due to a changed measurand and thus has to be determined. However, up to now frequency reader systems showed several drawbacks like high costs or insufficient accuracy that blocked the way for a widespread usage of this approach in the mass market. Hence, this article presents a miniaturized and low cost six-port based frequency reader for SAW resonators in the 2.45 GHz ISM band that does not require an external calculation unit. It is shown that it can be either used to evaluate the scenario or measure the frequency directly with an amplitude or phase measurement, respectively. The performance of the system, including the hardware and embedded software, is finally shown by wired and contactless torque measurements.

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Section: Rf-section and Link Budgetmentioning

confidence: 99%

…”

Section: Prototypementioning

confidence: 99%

Miniaturized Hybrid Frequency Reader for Contactless Measurement Scenarios Using Resonant Surface Acoustic Wave Sensors

Scheiner

Probst

Michler

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…The first variant acquisition and tracking procedure, of our proposed method, consists of acquiring BOCsin/cos(α,β) modulated signals with α ˃ β, and more specifically with α >> β, after undergoing a transformation based on undersampling process. The latter technique relies on sampling one desired signal with a frequency that is lower than twice the highest signal frequency (Shannon frequency) [51], [52], [53], [54]. The main purpose of such processing, which does not meet the Nyquist condition, is to bring closer the main lobes of BOCsin/cos(α,β) signals and provide, thus signals similar to those of BOCsin/cos(α,α).…”

Section: Principle Of the Proposed Methodsmentioning

confidence: 99%

GNSS Signals Acquisition and Tracking in Unfavorable Environment

Chebir¹,

Aidel²,

Rouabah³

et al. 2018

RADIOENGINEERING

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“…RF Filters. Down-converting an RF signal to an IF by employing subsampling results in a poorer Signal-to-Noise Ratio (SNR) compared with that from performing a down-conversion with an RF mixer (Pekau and Haslett, 2006). In order to minimize the out-of-band noise at the output of the ADC, subsampling receivers impose stringent requirements on the selectivity of the Anti-Aliasing (AA) filters preceding A/D conversion (Ucar et al, 2008).…”

Section: R F F R O N T -E N Dmentioning

confidence: 99%

A Chip Scale Atomic Clock Driven Receiver for Multi-Constellation GNSS

et al. 2013

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This paper presents the design and implementation of a Chip Scale Atomic Clock (CSAC) driven dual-channel Digitally Configurable Receiver (DCR) for Global Navigation Satellite Systems (GNSS). The receiver is intended to be used for research applications such as; multipath mitigation, scintillation assessment, advanced satellite clock and spatial frame transformation modelling, Precise Point Positioning (PPP) as well as rapid development and assessment of novel circuits and systems for GNSS receivers. A novel sub-Nyquist sampling (subsampling) receiver architecture incorporating dual-band microstrip RF filters is employed in order to minimize the complexity of the multi-frequency Radio Frequency (RF) front-end. Moreover, the digital receiver incorporates a novel and complexity-reduced Fast Fourier Transform (FFT) core for signal acquisition as well as COordinate Rotation DIgital Computer (CORDIC) cores for the code/carrier discriminators in order to minimize the resource allocation on the FPGA. The receiver also provides easy access to enable adjustment of its internal parameters such as; RF gain, position update rate, tracking channel correlator spacing and code/carrier loop noise bandwidth. Correlator outputs, code/carrier error, Carrier-to-Noise Ratio (C/N 0 ), navigation and RINEX data are provided to the end-user in real-time. This paper collectively highlights and reports on the implementation, test and validation of the novel techniques, elements and approaches in both the RF and digital part of the DCR that comprise the multi-constellation receiver. K E Y

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Cascaded noise figure calculations for radio receiver circuits with noise-aliasing properties

Cited by 8 publications

References 7 publications

Miniaturized Hybrid Frequency Reader for Contactless Measurement Scenarios Using Resonant Surface Acoustic Wave Sensors

Miniaturized Hybrid Frequency Reader for Contactless Measurement Scenarios Using Resonant Surface Acoustic Wave Sensors

GNSS Signals Acquisition and Tracking in Unfavorable Environment

A Chip Scale Atomic Clock Driven Receiver for Multi-Constellation GNSS

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