Á¦8Àý ±æ½Ó ºÎÈ£(Convolutional Code)
°¡. Signal flow graph
»óÅ º¯Èµµ¸¦ ÀÌ¿ëÇÏ¿© °¢ branchÀÇ gainÀ» xi, yj, zk·Î Ç¥½Ã
i – Ãâ·Â ºÎÈ£¾îÀÇ Hamming weight
j – °æ·Î ±æÀÌ
k – ÀÔ·Â Á¤º¸ÀÇ Hamming weight
State 0Àº initial state¿Í final state·Î ºÐ¸®ÇÏ°í state 0ÀÇ self-loop´Â »èÁ¦ÇÏ¿© ³ªÅ¸³¿.
³ª. Generating function
State 0¿Í state 0 »çÀÌ¿¡ ÀÖÀ» ¼ö ÀÖ´Â ¸ðµç °æ·Î À̵æÀ» ±¸ÇÏ´Â ÇÔ¼ö.
»ý¼ºÇÔ¼ö T(x, y, z) ±¸ÇÏ´Â ¹æ¹ý
¨ç °¢ branchÀÇ gainÀ» ´ÜÀÏ ¹®ÀڷΠǥ½Ã.
¨è ÀϺΠstate°£ º¹ÀâÇÑ °æ·Î¸¦ °£´ÜÈ÷ ¸¸µê.
¨é T(x, y, z) °è»ê.
¨ê long division expansion
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