Familiar with GSM, IS-95 and CDMA2000. Earlier work focused on generalized interleavers, which extend the concept of interleaving to include additions besides permutations in the hope of a better distance spectrum. Preliminary study has shown striking potentials by using generalized interleavers in turbo codes.
Current research focuses on the decoding structure of multiple turbo codes.
A new decoding scheme, the extended serial structure, has been proposed and proved to give the best performance among an extensive selection of decoding structures, including the parallel mode, which used to be considered the best. The circuit contained 6922 transistors and was verified functional by computer simulations. Both gate-level and physical designs were carried out. Derived Gaussian approximations as well as upper and lower bounds on the bit error rate. Verified results with simulations.