Improved encoding structure and decoding algorithms for spinal codes

To improve the error correction performance, an innovative encoding structure with tail-biting for spinal codes is designed. Furthermore, adaptive forward stack decoding (A-FSD) algorithm lower complexity proposed. In A-FSD algorithm, a flexible threshold parameter set by variable channel state to narrow scale of nodes accessed. On this basis, new method AFSD early termination (AFSD-ET) further The AFSD-ET decoder not only has ability dynamically modifying number stored nodes, but also adopts criterion curtail complexity. and related parameters are verified through series simulations. simulation results show that proposed algorithms can reduce rate without sacrificing correct performance.