Back to results
US 6,665,834 B2Granted
Flexible method of error protection in communications systems
OwnerDavid R. Irvin, Ali S. Khayrallahinventors
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerDavid R. Irvin, Ali S. Khayrallahinventors
Estimating the term…
A flexible method of error coding uses at least two generating polynomials to provide different degrees of error protection and to optionally superimpose a phantom channel on a primary channel, without the need for explicit signaling from transmitter to receiver. An encoded message is CRC decoded the on the receive side with at least two different generating polynomials. Based on the results of the twin decoding, the present method can determine which of the generating polynomials was used to encode the message and respond accordingly. For instance, if the a particular generating polynomial was used, then this may be use to indicate that a second channel has been superimposed onto the primary channel and that second channel may be extracted. On the other hand, if another generating polynomial, such as the default generating polynomial, was used, this may be used to indicate that no second channel has been superimposed.
A method of detecting a second channel optionally embedded in a first channel having a fixed frame and using cyclic redundancy check (CRC) error coding, comprising:
A method of detecting a second channel selectively superimposed on a first channel using cyclic redundancy check (CRC) error coding, comprising:
A method of detecting a second channel selectively embedded in a first channel having a fixed frame and using cyclic redundancy check (CRC) error coding, comprising:
Dependencies are inferred from the claim text.