Method and apparatus for communicating interleaved data

Details Method and apparatus for communicating interleaved data Method and apparatus for communicating interleaved data

H - Electricity

04

L

H04L 9/12 (2006.01) H03M 13/27 (2006.01) H03M 13/33 (2006.01) H04J 3/06 (2006.01) H04L 29/14 (2006.01)

Patent

CA 2098772

An interleaves (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaves (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaves on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.

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