Abstract
This paper describes the method of detecting the absolute position by four track : the 5 625 pulses absolute track, it's the inverse track, the 5 625 pulses incremental track and 45 000 pulses incremental track, and of doing 2 bit error detection and 1 bit error correction of the 5 625 pulses absolute positions. The 5 625 pulses absolute tracks are made by the selected partof the 8 191 length M-sequences. The 11 200, 22 500 pulses signals for detecting the 45 000 absolute position, are made by interporating of the 5 625 pulses incremental signal. The 45 000 pulses absolute positions are gotten by adjusting the phase relation between the interporated signals and the 45 000 pulses incremental signal. The 36 000 000 pulses absolute positions are gotten by interporating the 45 000 pulses incremental signal. The 2 bit error detections and 1 bit error correction are done by the linear reflexive relations of a M-sequences and look-up table of the ROM (Read Only Memory).
