Modulation and sensitivity limits for backscatter receivers

Durgin, Gregory D.; Valenta, Christopher R.; Akbar, Muhammad B.; Morys, Marcin M.; Marshall, Blake R.; Lu, Yenpao A

doi:10.1109/rfid.2013.6548145

Cited by 28 publications

(12 citation statements)

References 10 publications

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“…100 mW [8] 200 m [9] The tunnel diode-based RFID tag can be easily improved. Amplitude modulation and Manchester encoding have already been illustrated by appropriately biasing on and off the tunnel diode; but sophisticated coding techniques ( [10], [11]) can increase the communication distances. These results suggest better requirements in the sensitivity of next generation readers and encourage to implement the described prototype as a single chip component.…”

Section: Discussionmentioning

confidence: 99%

Long range and low powered RFID tags with tunnel diode

Amato

Peterson

Akbar

et al. 2015

2015 IEEE International Conference on RFID Technology and Applications (RFID-TA)

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In this paper, we present a 5.8 GHz RFID tag equipped with a high gain, low power reflection amplifier based on a tunnel diode. Experimental results show that the realized prototype achieves gains above 40 dB and requires only 29 μW of biasing power. The tag detects very low RF signals (< -90 dBm) and provides read ranges up to 2 km. Long communication ranges and Manchester encoding are achieved by biasing on and off the tunnel diode.

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Section: Discussionmentioning

confidence: 99%

Long range and low powered RFID tags with tunnel diode

Amato

Peterson

Akbar

et al. 2015

2015 IEEE International Conference on RFID Technology and Applications (RFID-TA)

Self Cite

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“…Careful selection of the bit rate along with the number of inter-bit transitions with regards to a reader’s noise spectral characteristics was shown to maximize sensitivity while being mindful of power or energy consumption by the backscatter RF tag [ 91 ]. This strategy maximizes the sensitivity of the backscatter modulation while maintaining the tag’s power requirements.…”

Section: Communication Issues and Solutionsmentioning

confidence: 99%

A Review of Passive RFID Tag Antenna-Based Sensors and Systems for Structural Health Monitoring Applications

Zhang

Tian

Marindra

et al. 2017

Sensors

312

172

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In recent few years, the antenna and sensor communities have witnessed a considerable integration of radio frequency identification (RFID) tag antennas and sensors because of the impetus provided by internet of things (IoT) and cyber-physical systems (CPS). Such types of sensor can find potential applications in structural health monitoring (SHM) because of their passive, wireless, simple, compact size, and multimodal nature, particular in large scale infrastructures during their lifecycle. The big data from these ubiquitous sensors are expected to generate a big impact for intelligent monitoring. A remarkable number of scientific papers demonstrate the possibility that objects can be remotely tracked and intelligently monitored for their physical/chemical/mechanical properties and environment conditions. Most of the work focuses on antenna design, and significant information has been generated to demonstrate feasibilities. Further information is needed to gain deep understanding of the passive RFID antenna sensor systems in order to make them reliable and practical. Nevertheless, this information is scattered over much literature. This paper is to comprehensively summarize and clearly highlight the challenges and state-of-the-art methods of passive RFID antenna sensors and systems in terms of sensing and communication from system point of view. Future trends are also discussed. The future research and development in UK are suggested as well.

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“…When random body motion appears close to the reader, direct reflection can increase dramatically [6], causing power-dependent phase distortion in the receiver with high-gain RF frontend, even to the degree to jam the receiver entirely. Phase noise in the leakage path also increases the noise floor, resulting in further reduction of receiver sensitivity [9]. In harmonic backscattering, the tag responds by generating second harmonic (SH) at 2ft>, which is far away from^u-Thus, the undesirable self-leakage and direct reflection interference onfo can be readily filtered out.…”

Section: Harmonic Backscatter and Interference Reductionmentioning

confidence: 99%

“…Vr,l<.r<,n,f r éB J The reader keeps sending out sequences of the selected optimized frequencies from (9). The time interval between consecutive frequencies is At s .…”

Section: A Signal Modelmentioning

confidence: 99%

Millimeter accuracy passive tag ranging via second harmonics RF backscattering against body movement interference

Rong

Kan

2014

2014 IEEE Global Communications Conference

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Interference caused by unpredictable body motion is notorious in RF-based ranging and tracking. For passive tags, the strong self-leakage signal and large unwanted direct reflections encountered in conventional RFID transceivers make precision ranging even more difficult. To achieve fast, high accuracy ranging capability against body motion interference, we investigate a second harmonic backscattering solution in the opportunistic method of sequential-test heuristic multi-frequency continuous wave ranging (ST-HMFCW). We show that direct reflection and self-interference are greatly suppressed, so the received second harmonic phase variation is decoupled from the power-dependent phase distortion caused by large interference. ST-HMFCW further seeks opportunities in phase fluctuations caused by interférer motion with drastic performance improvement as bandwidth increases. Robust millimeter-accuracy ranging is achieved under strong body-motion interference with the broadband nonlinear transmission line (NLTL) backscatter tags. We present the theory, simulation and experimental prototypes to verify the effectiveness of the proposed ST-HMFCW ranging method.

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Modulation and sensitivity limits for backscatter receivers

Cited by 28 publications

References 10 publications

Long range and low powered RFID tags with tunnel diode

Long range and low powered RFID tags with tunnel diode

A Review of Passive RFID Tag Antenna-Based Sensors and Systems for Structural Health Monitoring Applications

Millimeter accuracy passive tag ranging via second harmonics RF backscattering against body movement interference

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