Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-03-24
2008-08-19
Vo, Don N (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S148000
Reexamination Certificate
active
07415061
ABSTRACT:
A communication system performs burst noise cancellation. A transmitter produces and transmits a spread signal that comprises at least one known-value symbol spread by a plurality of non data-carrying orthogonal codes and data symbols spread by at least one data-carrying orthogonal code. The transmitter transmits the spread signal across a communication link that introduces burst noise. A burst noise detector determines burst noise affected chips of the orthogonal codes. A weight computation functional block calculates a plurality of complex-valued combining weights based upon the burst noise affected chips. A vector de-spreader and a linear combiner operate in combination to use the plurality of non data-carrying orthogonal codes, the at least one data-carrying orthogonal code, and the plurality of complex-valued combining weights to de-spread the received spread signal to produce the data symbols with the burst noise substantially removed.
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“Performance Analysis of the Adaptive Projection Receiver for Joint Detection of CDMA” by Tao Wu, Christian Schlegel; Electrical Engineering Department, University of Utah, Salt Lake City, UT 84112; pp. 2250-2254; copyright 1999 IEEE.
Currivan Bruce J.
Kolze Thomas J.
Ungerboeck Gottfried
Yousef Nabil R.
Broadcom Corporation
Garlick Bruce E.
Garlick & Harrison & Markison
Vo Don N
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