What is CCD (Cyclic Delay Diversity)?

Cyclic Delay Diversity (CDD) is a variety method utilized in OFDM-based telecom frameworks, changing spatial diversity into frequency diversity and hence thus avoiding intersymbol interference. CDD was presented in 2001. It can acquire frequency diversity at the receiver without changing the SISO receiver structure. It is utilized in spatial multiplexing to enhance diversity between the 2 spatial paths.