Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2007-03-13
2007-03-13
Phu, Phuong (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S262000, C375S265000, C375S341000
Reexamination Certificate
active
09785780
ABSTRACT:
An original information sequence is encoded by a use of an error correcting code. There is associated with the encoded sequence K frequency symbols in a space consisting of a series of 2pincreasing frequencies, each of the K symbols representing N encoded symbols, with p, K and N being strictly positive integers. There is applied to the K symbols a reversible transformation including a multiplication by an invertible matrix of size N×N, and signals obtained from the inverse transform signals are sent. There exists a K-tuplet of positive integers n1, n2, . . . , nkat least one of which is strictly positive, such that, for an integer I varying from 1 to K, after periodic extraction of one frequency out of 2niamong the frequencies of the ithof the K symbols, thus forming a reduced frequency symbol of 2p−nifrequencies, K reduced frequency symbols are obtained, representing the original information sequence, with a view to complete or partial decoding.
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Phu Phuong
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