Generalised type-II hybrid ARQ

The letter gives general descriptions of II-GHARQ and defines a concept of minimum distance distributed sequence (DDS) which is more exact to represent the error-correcting capability of the codes used in II-GHARQ. Some DC codes which have a better DDS than KM codes are designed and Hadamard transform decoding is regarded as a common decoding method. Both analysis and simulation results indicate that II-HARQ using DC code gives a good throughput efficiency.