Patent ID: 6456667
Filing Date: 2002-09-24
Classification: H04L

Abstract:
A method of coding a signal for digital communication using a symbol formed of N slots (s1, s2, s3, . . ., sN), wherein si is either 0 or 1 where i is an integer and 1&lE;i&lE;N, comprising the steps of:coding transmission data based on a plurality of symbols which satisfy the following expression, wherein k is an arbitrary positive integer, and p1, q1, p2, q2, . . . , pk and qk are integers which satisfy 1&lE;p11, 1&lE;p22, . . . , 1&lE;pkk, and p1/q12/q2k/qk: &AutoLeftMatch;&Sum;i=1N&it;si&it;{cos&af;(2&it;Ï€&it;â€ƒ&it;P1q1&it;(i-1))-cos&it;â€ƒ&it;(2&it;Ï€&it;P1q1&it;i)}=0&Sum;i=1N&it;si&it;{sin&af;(2&it;Ï€&it;â€ƒ&it;P1q1&it;i)-sin&it;â€ƒ&it;(2&it;Ï€&it;P1q1&it;(i-1))}=0&Sum;i=1N&it;si&it;{cos&af;(2&it;Ï€&it;â€ƒ&it;P2q2&it;(i-1))-cos&it;â€ƒ&it;(2&it;Ï€&it;P2q2&it;i)}=0&Sum;i=1N&it;si&it;{sin&af;(2&it;Ï€&it;â€ƒ&it;P2q2&it;i)-sin&it;â€ƒ&it;(2&it;Ï€&it;P2q2&it;(i-1))}=0â€ƒ&it;&vellip;&Sum;i=1N&it;si&it;{cos&af;(2&it;Ï€&it;â€ƒ&it;Pkqk&it;(i-1))-cos&it;â€ƒ&it;(2&it;Ï€&it;Pkqk&it;i)}=0&Sum;i=1N&it;si&it;{sin&af;(2&it;Ï€&it;â€ƒ&it;Pkqk&it;i)-sin&it;â€ƒ&it;(2&it;Ï€&it;Pkqk&it;(i-1))}=0)and transmitting the coded transmission data.