Image Transmission with High-Rate LDPC Codes in Multicarrier Systems

摘要

Low-density parity-check (LDPC) codes have near Shannon performance and easy to implement. Multicarrier modulation can achieve high spectral efficiency and resist the inter-symbol interference (ISI). In this paper, we explored three high rate LDPC codes in image transmission with multicarrier modulation. The simulation results show that the combination of multicarrier modulation and high rate LDPC codes can obtain high information speed and high bandwidth efficiency with high reliability and excellent performance in image communication over wireless channels. This can solve the problems about transmission speed and efficiency caused by large quantity of image data. We also found that the performance is more sensitive to code rate than to code length.