Protograph-Based Block LDPC Code Design for Marine Satellite Communications

Abstract

In this paper, the protograph-based block low density parity check (LDPC) code, which improves the performance and reduces the encoder/decoder complexity than the conventional Digital Video Broadcasting Satellite Second Generation (DVB-S2) LDPC code used for the marine satellite communication, is proposed. The computer simulation results verify that the proposed protograph-based LDPC code has the better performance in both the bit error rate (BER) and the frame error rate (FER) than the conventional DVB-S2 LDPC code.Furthermore, by analyzing the encoding and decoding computational complexity, we show that the protograph-based block LDPC code has the efficient encoder/decoder structure.

Design of Ultra-Wide Band Antenna with Compact MCR Structure for BW Enhancement

“…The final design exhibits a size of only 180 ㎟. This is smaller than most of the competitive designs available in literature [11][12][13] . The dimension of the miniaturized designs are 15 × 12 ㎜, it is noticeable that the algorithm of [5] has been configured in such a way that it allows clear reduction of the structure size while maintaining the condition |S11|≤= -10 ㏈ for the entire UWB band having maxim value of -38 ㏈.…”