A Study on Improving Extended Parity Generation for LDM-BST-OFDM

In this paper, we studied improvement of extended parity generation for LDM-BST-OFDM(Layered Division Multiplexing - Band Segmented Transmission - Orthogonal Frequency Division Multiplexing). In the proposed scheme for fixed reception, the parity-check matrix of the LDPC(Low-Density Parity-Check) code whose length is 69120 is extended. After that, the extended parity bits are generated by the extended parity-check matrix and modulated. These modulated symbols are LDM-combined with the symbols for mobile reception. The performances of the proposed scheme are evaluated by computer simulations under AWGN(Additive White Gaussian Noise). As the results, the required CNR(Carrier to Noise Ratio) of fixed reception can be improved by the proposed scheme.