The authors expand their recently introduced concept of Unique Word Orthogonal Frequency Division Multiplexing (UW-OFDM). In UW-OFDM the Cyclic Prefixes (CPs) are replaced by deterministic sequences, the so-called Unique Words (UWs). The UWs are generated by appropriately loading a set of redundant subcarriers. By that a systematic complex number Reed-Solomon (RS) code construction is introduced in a quite natural way, because an RS code may be defined as the set of vectors, for which a block of successive zeros occurs in the other domain w.r.t. a discrete Fourier transform.