Phase-shift cyclic-delay diversity (PS CDD) scheme and space-frequency-block-code (SFBC) PS CDD are developed for multiple-input-multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The proposed PS CDD scheme preserves the diversity advantage of traditional CDD in uncorrelated multiantenna channels, and furthermore removes frequency-selective nulling problem of the traditional CDD in correlated multiantenna channels.
Nam, Young-Han, Lingjia Liu, and Jianzhong (Charlie) Zhang. "Phase-Shift Cyclic-Delay Diversity for MIMO OFDM Systems." International Journal of Digital Multimedia Broadcasting 2010 (2010): 1-5. http://dx.doi.org/10.1155/2010/684967
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