Title :
Cyclic delay diversity performance in OFDMA based system
Author :
Wei, Chao ; Hu, Teck ; You, Xiaohu
Author_Institution :
Nokia Siemens Networks, Beijing
Abstract :
In this paper, we aim to provide an analytical modeling of cyclic delay diversity in an OFDMA based system. Cyclic delay diversity is a low complexity spatial diversity scheme where multiple transmit antennas transmit delayed versions the same signal. While CDD increases the frequency selectivity, the reduced coherence bandwidth resulted in higher requirements for the channel estimation at the receiver. This paper presents a preliminary model with objective of providing tradeoff study of maximum tolerable cyclic delay value vs. performance impacts to the system.
Keywords :
channel estimation; diversity reception; frequency division multiple access; CDD; OFDMA; analytical modeling; channel estimation; cyclic delay diversity; multiple transmit antennas; Analytical models; Channel estimation; Chaos; Delay effects; Delay estimation; Delay systems; Performance analysis; Transmitters; Transmitting antennas; WiMAX; Cyclic delay diversity; WiMAX; channel estimation;
Conference_Titel :
Wireless Conference, 2008. EW 2008. 14th European
Conference_Location :
Prague
Print_ISBN :
978-3-8007-3102-2
DOI :
10.1109/EW.2008.4623890