Patent ID: 6081555
Filing Date: 2000-06-27
Classification: H04L

Abstract:
A signal point encoder comprising:first means for mapping first digital input data into an output including a number of ring indices;means for reordering said ring indices according to a reordering algorithm to thereby produce a number of reordered ring indices; andsecond means for mapping second digital input data into a number of signal points, said second means for mapping being responsive to said reordered ring indices;wherein said means for reordering reorders said ring indices according to a function f(x)=y, where x is the reordered ring index and y is the initial ring index; and for a data rate of approximately 56 kbits/second, f(0)=3, f(1)=4, f(2)=2, f(3)=5, f(4)=1, f(5)=0, f(6)=6, f(7)=7, and f(8)=8.