Researchers at Princeton University and the University of Pisa have developed a
novel Initial Ranging scheme for OFDMA networks where carrier frequency offsets,
timing errors and power levels are estimated for all ranging subscriber
stations. Princeton is currently seeking industrial collaborators to
commercialize this technology.
Existing Initial Ranging schemes estimate the timing offsets and power levels of
ranging subscriber stations without taking into account possible carrier
frequency offsets between the received signals and the base station local
reference. This new scheme improves on existing designs by estimating
carrier frequency offsets and power levels through subspace-based methods while
the least-squares criterion is employed for timing recovery. Computer
simulations are used to assess the effectiveness of the proposed solution and to
make comparisons with existing alternatives.
It is anticipated that this new
approach can be utilized by companies working to develop next generation
broadband wireless communication systems. Patent protection is
pending.
References:
L. Sanguinetti, M. Morelli and H. V. Poor,
¿An Improved Scheme for Initial Ranging in OFDMA-based
Networks,¿
Proceedings of the 2008 IEEE International Conference on
Communications,
Beijing, May 19 ¿ 23, 2008.
L. Sanguinetti, M. Morelli and H. V. Poor,
¿A Subspace-Decomposition Approach for Initial Ranging in
OFDMA Systems,¿
Proceedings of the Ninth IEEE Workshop on Signal
Processing Advances in Wireless Communications,
Recife, Brazil, July 6 ¿ 9, 2008.
For more information please contact:
William H. Gowen
Office of Technology Licensing and Intellectual Property
Princeton University
4 New South Building
Princeton, NJ 08544-0036
(609) 258-6762
(609) 258-1159 fax
wgowen@princeton.edu