ISSN : 1796-2021
Volume : 3    Issue : 2    Date : April 2008

An RF-ID Reader Using SAW Dispersive Delay Lines For Wideband Synchronisation
Thomas M. McCoy, Paul V. Brennan and Richard J. Bullock
Page(s): 22-33
Full Text:
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RF-ID systems are susceptible to frequency interference from other communcation systems
particularly when the RF-ID tags transmit on a fixed carrier frequency. The RF-ID systems are less
vunerable to frequency interference when frequency diversity is used by the RF-ID system. This
paper proposes an architecture for an RF-ID receiver which allows a number of active RF-ID tags
with oscillators of low frequency stability to be accommodated within the same RF-ID cell. The
synchronisation technique used by the receiver contains a carrier frequency estimator which has
been designed using SAW dispersive delay lines. The carrier frequency estimator uses the spectral
properties of the received signal to estimate the carrier frequency. The analytic and simulated
performance of the carrier frequency estimator has been examined for two peak search algorithms.

Index Terms
RF-ID, communication, receiver, synchronisation, wide bandwidth, tags, frequency stability