Luby Transform Coding Aided Bit-Interleaved Coded Modulation for the Wireless Internet
Ronald Y. S. Tee, Thanh Dang Nguyen, Soon Xin Ng, Lie‐Liang Yang, Lajos Hanzo · IEEE Vehicular Technology Conference · 2007
Bit-Interleaved Coded Modulation using Iterative Decoding (BICM-ID) is amalgamated with Luby Transform (LT) coding. The resultant joint design of the physical and data link layer substantially improves the attainable Bit Error Rate (BER) performance. A Cyclic Redundancy Check (CRC) combined with a novel Log-Likelihood Ratio (LLR) based packet reliability estimation method is proposed for the sake of detecting and disposing of erroneous packets. Subsequently, bit-by-bit LT decoding is proposed, which facilitates a further BER improvement at a lower number of BICM-ID iterations. Finally, we revisit the pseudo random generator function used for designing the LT generator matrix.