A Serial-Parallel Concatenated System: Construction and Iterative Decoding with Erasures

We attempt to improve the performance of an existing wireless packet transmission system that uses coding and transmitter diversity. We view it as a concatenated system, system constructed by “concatenationn of encoding blocks and interleavers a t the transmitter. The transmitter structure is improved using a better interleaving scheme, the receiver architecture by applying a n iterative decoder with AZD (ambiguity zone detection) structure. This receiver uses generalized erasures, which are resolved in an iterative process. Using this framework, overall encoding and decoding gain of almost 9 dB is achieved with small increase in complexity and decoding delay.