| 摘要 |
An approach for encoding a physical layer (PL) header of a PL data frame is provided. The PL header comprises sixteen information bits w,, (i = 0, 1,2,...., 15). and the encoding is based on a convolutional code, whereby. for each information bit. five associated parity bits Pi,k p(k = 0,1,2,3,4) are generated, resulting in 80 codebits. The resulting 80 codebits are punctured to form a (16.77) codeword (c0, cl,c2,...... c76). The codebits of the (16,77) codeword are repeated to generate a (16.154) physical layer signaling codeword (c0,C0,c1,c1,C2,C2l..,,c76,c76) for transmission of the PL data frame over a channel of a communications network. Farther, for each information bit. each of rhe associated five parity bits is generated based on a parity 'bit generator, as follows: pi,k = (ut * gk,0) (S0 * gk,1) (S * gk,2) (S2 * gk,3) (S3* gk,4) , where S0 = ui-1, S1 = Ui-2. S2 = ui-3, S3 = ui_4 , and wherein generator polynomials for gk = (gk,0,gk,2,gk,3,gk,4) are as follows: g0 = (1,0,1,0,1); g1= (1,0,1,1,1): g2 = (1,1,0,1,1): g3 = (l,l, 1,1,1): g4 = (1,1,0,0.1). |
