Data transmission method and device thereof

This method (1) selects 8 mutually orthogonal basic codes; each of which forms a basic code subset (BCS); (2) sets 4 phasic subsets (PS), each of which contains 2 different phase values; all PS are different from one another; (3) then the data sender begins the series-parallel conversion against the serial information; obtains 4 routes of parallel data; (4) divides evenly them into 2 groups; one group is format-coded, the output of which selects a BCS; (5) a datum from the other group is format-coded too, the output of which selects a PS; (6) another datum from the later group selects a phase value; (7) via the mentioned phasic value, circumrotates the codes in the mentioned BCS to obtain the output codes, then sends them to the data receiving end. At the same time, this invention also discloses another data-transmitting method and two data-transmitting devices.