On space-frequency coding using cyclic delay diversity for OFDM-based transmission systems

Due to its advantages with respect to allowing simple receivers and flexibility, OFDM is – in addition to already existing systems such as DVB-T or HIPERLAN/2 – presently under consideration as auspicious candidate for future wireless communication air interface. However, despite many advantages, the lack of inherent diversity of pure OFDM based transmission schemes represents a major drawback. Therefore, additional methods have to be introduced into such systems to enable the exploitation of the radio channel diversity. In