| 摘要 |
The apparatus includes a first labeller for associating, with the information to be coded, K initial first degree polynomials, and a coder, performing a polynomial calculation. In order to form K coded sequences of P coded polynomials (where P /- K and the first sequence is equal to one of the K initial polynomials, whilst the other sequences are equal to the product of the preceding polynomial and a predetermined polynomial), a sequence of P resultant polynomials are formed equal to the sums of the coded polynomials of the same rank as the K coded sequences. A second one to one labeller labels the points of a QAM signal constellation with the Q<2> (where Q is a power of a prime number) resultant polynomials for two adjacent points of the constellation. The polynomials labelling them have one identical coefficient and the other coefficient differing only by modulo Q. A QAM modulator for is also included.
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