Combining signals with a shuffled-hadamard function
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United States of America Patent
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Feb 18, 2014
Grant Date -
Jun 13, 2013
app pub date -
Jan 17, 2013
filing date -
Dec 5, 2000
priority date (Note) -
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Abstract
A method can include receiving, at a transmitter, during a symbol time that comprises a plurality of chip times, a data value for each of a plurality of distinct data channel inputs. During each chip time, the method can include (a) indexing a different row of a matrix of data bits; (b) decoding one channel input using a first subset of one or more columns of the indexed row; (c) determining a code value for the decoded one channel from a second subset of one or more columns of the indexed row; and (d) providing the coded data value to a transmission circuit for transmission to a receiver. Actions (a) to (d) can be performed for each of the plurality of chip times in the symbol time. In some implementations, the matrix of data bits is a Hadamard matrix with randomly shuffled rows.
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