Cancellation of burst noise in a communication system with application to S-CDMA
First Claim
1. An apparatus, comprising:
- a linear combiner for identifying an adapted orthogonal signal component among a plurality of orthogonal signal components of a signal; and
an interference cancellation module for employing the adapted orthogonal signal component for producing a plurality of data symbols that is substantially free of interference.
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Accused Products
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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Citations
44 Claims
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1. An apparatus, comprising:
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a linear combiner for identifying an adapted orthogonal signal component among a plurality of orthogonal signal components of a signal; and an interference cancellation module for employing the adapted orthogonal signal component for producing a plurality of data symbols that is substantially free of interference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus, comprising:
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an input for receiving a signal from a communication channel; a linear combiner for identifying an adapted orthogonal signal component among a plurality of orthogonal signal components of a signal; and an interference cancellation module for employing the adapted orthogonal signal component for producing a plurality of data symbols that is substantially free of interference; and a memory module for storing a plurality of combining weights; and
wherein;the linear combiner scaling a plurality of non-data-carrying orthogonal signal components using the plurality of combining weights thereby generating a plurality of scaled non-data-carrying orthogonal signal components; and the linear combiner combining a data-carrying orthogonal signal component with the plurality of scaled non-data-carrying orthogonal signal components thereby generating the adapted orthogonal signal component. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method, comprising:
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receiving a signal from a communication channel; identifying an adapted orthogonal signal component among a plurality of orthogonal signal components of the signal; and within an interference cancellation module, employing the adapted orthogonal signal component for producing a plurality of data symbols that is substantially free of interference. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification