Abstract:
The paper deals with the BER and Throughput vs. SNR performances of the LDPC-coded QAM signal constellations modulated on OFDM-type multicarrier transmissions. It analyzes, by means of computer simulation, the influences of the LDPC-code parameters (codeword length and rate) and the effects of mapping various ratios of coded and non-coded bits on QAM symbols, upon the SNR performances of these transmissions. Comparisons to the Shannon limits are presented as well.
