Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate
2011-06-28
2011-06-28
Ferris, Derrick W (Department: 2463)
Multiplex communications
Communication over free space
Combining or distributing information via time channels
Reexamination Certificate
active
07969962
ABSTRACT:
The present invention relates to compensation method and circuit for compensating time drifts in a receiver suited for multi-path environment. The time drifts are separated into a first component common to groups of paths belonging to the same radio link, for example a radio link of a connection between a user equipment and a base station, and second components valid for each individual path belonging to a group. The first component is processed by employing first feedback means with a first bandwidth, and the second components are processed by employing a second feedback means with a second bandwidth, wherein the first bandwidth is set to a value higher than the second bandwidth. Thereby, the bandwidth of the loop devoted to the individual tracking of each path can be slower and adjusted to environmental conditions, so as to allow application of a principle of interference mitigation for improving time resolution.
REFERENCES:
patent: 2002/0034218 (2002-03-01), Papasakellariou et al.
patent: 2002/0127983 (2002-09-01), Black et al.
patent: 2005/0041724 (2005-02-01), Chansarkar
patent: 2003034090 (2003-04-01), None
patent: 2004047327 (2004-06-01), None
Aue et al. (“A Non-Coherent Tracking Scheme for the Rake Receiver That Can Cope With Unresolvable Multipath” IEEE International Conference on Communications, 1999. vol. 3, Jun. 1999, pp. 1917-1921).
Aue, V; et al “A Non-Coherent Tracking Scheme for the Rake Receiver That Can Cope With Unresolvable Multipath” IEEE International Conference on Communications, 1999. vol. 3, Jun. 1999, pp. 1917-1921.
Baunach Jeremiah J.
Ferris Derrick W
Seed IP Law Group PLLC
ST-Ericsson SA
Yeung Mang
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