Generalized Soft-Output Layered Orthogonal Lattice Detector for Golden Code

The authors develop a generalized layered orthogonal lattice detector (G-LORD) for the golden code. G-LORD includes the previously developed LORD algorithm and exhaustive search ML detection as special cases, and is proved to achieve the perfect balance between error performance and complexity. Meanwhile, G-LORD is suitable for parallel implementations, and has a deterministic complexity as opposed to the sphere decoder approach. Thanks to the special structure of the golden code, G-LORD can implement the optimal ordering with very low complexity. Most importantly, G-LORD can efficiently generate bit soft-output metric when golden code is concatenated with outer channel code. The development of G-LORD boosts the practical application of the golden code.