Precoder design for different channel lengths

Apparatus and methods construct parameters for a unit associated with a precoder to a channel. Embodiments include forming a plurality of values for precoder constructions, where the values may be obtained from applying a transmission quality criterion to each precoder construction for varying channels lengths. Each precoder construction may be built for a predetermined channel length with a different channel length for each precoder construction. A subset of the precoder constructions operate substantially over the entire distance range covered by the varying channels lengths.