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Design and Implementation of a UWB RFID Reader

Kananian, Siavash | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47323 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Fotowat Ahmady, Ali
  7. Abstract:
  8. Ultra-wideband (UWB) receivers have long been utilizied as a low-power solution for many applications, namely positioning, sensor network, and radar systems. As their name suggests, owing to the ultra-wide bandwidth nature of these receivers, which cover frequencies from 3.1GHz all the way to 10GHz, they entail many challenges at all levels of abstraction. Two of these most important challenges are in-band interferers, e.g., IEEE802.11a, and jitter. Because of the low-power operation of UWB receivers, with PSD of <-41.3dBm/Hz, the majority of the UWB RX’s function is based on the correlation principle, making it vulnerable to jitter. In recenet years, a new attention has been paid toward the old super-regenerative receivers (SRR), however to date, these RX’s have not been optimized subject to blocker and jitter tolerance. In this thesis, a UWB RX is designed for radio-frequency identification (RFID) applications which achieves an aggeragte data rate of 300Mbps and can withstand blockers as large as 0dBm thanks to a tunable notch filter (>40dB) embedded within the wideband LNA using the N-path filtering principle. Moreover, the baseband pulse employed here, includes a notch at the interference frequency, making the signal reception less vulnerable to desensitization due to blockers and preventling unwated loss of signal power. The latter is said to be the problem caused by many other similar approaches to blocker tolerance. While operating with OOK modulation, the designed RX is immune to the effect of jitter from all sources, as discussed in detail. Two loops ensure timing synchronization of the quench signal and the tank frequency of the super-regenerative oscillators (SRO)
  9. Keywords:
  10. Ultra Wideband ; Super Regenerative System ; N-Path Filter ; Radio Frequency Identification (RFID) ; Synchronisation ; Radio Frequency Identification (RFID) Reader ; Low Noise Amplifier (LNA) ; Super-Regenerative Oscillator (SRO)

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