Resulting Channel Characteristics From Time-Varying Cyclic Delay Diversity in OFDM

The influence of Time-Varying Cyclic Delay Diversity (TV-CDD) on the channel fading correlation properties is analyzed in this paper. TV-CDD is an attractive transmit diversity technique which increases not only the frequency diversity like pure CDD but also the time diversity in Orthogonal Frequency Division Multiplexing (OFDM) based systems. These transmit diversity schemes are characterized by no need of additional complexity at the receiver to exploit the increased transmit diversity. This paper gives first investigations regarding the resulting channel characteristics from TV-CDD and the impact on the system performance.