Ms. Qihe Pan Profile

Qihe Pan

at Pennsylvania State Univ

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Proceedings Article | 3 April 2008 Paper

An RF tag communication system model for noise radar

Qihe Pan, Ram Narayanan

Proceedings Volume 6980, 698007 (2008) https://doi.org/10.1117/12.777394

KEYWORDS: Radar, Signal detection, Telecommunications, Electronic filtering, RF communications, Interference (communication), Signal to noise ratio, Radar signal processing, Modulation, Sensors

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RF (radio-frequency) tags have drawn increasing research interest because of their great potential uses in many radio frequency identification applications. They can also be configured to work with radar as a communication channel by receiving radar acquisition signals, suitably coding these, and retransmitting them back to the radar. This paper proposes a system model for the communication between a noise radar and multiple RF tags. The radar interrogates the RF tags in a region of interest by sending ultrawideband noise signals. Upon receiving the radar's signal, all the tags within the radar's range wake up, and respond to the radar with simple messages. The RF tag filters the radar signal to a unique spectral band, which represents its identification information, and different RF tags occupy different non-overlapping bands of the spectrum of the radar signal. Tag messages are modulated onto the waveform through taps of weighted delays. The radar decodes the RF tag identifications and corresponding messages by cross-correlating the RF tag returned signals with the replica of the radar transmitted signal. Calculations and simulation results both show that the proposed system is capable of communicating simple messages between RF tags and radar.

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