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In orthogonal frequency division multiplexing (OFDM) systems, some subcarriers at the borders of the allocated bandwidth are not used for transmission as virtual subcarriers. Because of these subcarriers, some conventional channel estimators are not applicable, especially for multiple input multiple output (MIMO) systems. In this paper, our analysis on the effect of virtual subcarriers is briefly...
Since 3G long term evolution (LTE) is launched by 3GPP recently, many multiple access (MA) schemes have been proposed for 3G LTE, such as multi-carrier (MC) - WCDMA, MC-time duplex-synchronized CDMA (MC-TD-SCDMA), orthogonal frequency division multiple access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), which includes IFDMA (interleaved FDMA) and DFT-S OFDM (DFT-spreading...
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