Error correction code and apparatus for the correction of...

Details Error correction code and apparatus for the correction of... Error correction code and apparatus for the correction of...

H - Electricity

04

L

354/223.1

H04L 1/00 (2006.01)

Patent

CA 1068410

AN ERROR CORRECTION CODE AND APPARATUS FOR THE CORRECTION OF DIFFERENTIALLY ENCODED QUADRATURE PHASE SHIFT KEYED DATA (DQPSK) ABSTRACT This specification describes a convolutional code and apparatus for the correction of errors in differentially encoded quadrature phase shift keyed data (DQPSK). In each sequence of forty bits 24 are information bits and the remainder are parity bits. Two parity bits are generated for each three information bit set in the sequence in accordance with the following equations: Image where i?, i? and i? are the three information bits in the set associated with the parity bits P? and p? while the other information bits are from the seven sets of the sequence preceding the set associated with the parity bits.

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