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 “concatenation” of encoding blocks and interleavers at the transmitter. The transmitter structure is improved using a better interleaving scheme, the receiver architecture by applying an 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