Method and apparatus for performing decoding of codes with the u

Details Method and apparatus for performing decoding of codes with the u Method and apparatus for performing decoding of codes with the u

1996-09-11

1999-06-29

Baker, Stephen M.

Excavating

371 3706, 371 437, H03M 1300

Patent

active

059178370

ABSTRACT:
The present invention is a novel and improved method and apparatus for decoding a frame of digital data which contains redundant information provided to validate the decoding operation. In the present invention, a frame of data contains information bits and cyclic redundancy check (CRC) bits. The received frame is decoded and a check is conducted to determine whether the CRC bits correspond correctly for the decoded information bits. If the decoded frame passes the CRC test process, the decoded fame is provided to the user. However, if the decoded frame does not pass the CRC test, then at least one additional decoding process is performed on the received frame. In the first exemplary embodiment of the present invention, if the CRC test is failed, a noise vector of a predetermined set of noise vectors is summed with the received frame and the resultant frame is decoded for a second time. In the second exemplary embodiment of the present invention, when the CRC test fails, a set of the received symbols are replaced with symbol erasure indications.

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