Design of a multi-carrier CDMA downlink with different transmit antenna array strategies
Thomas Sälzer, D. Mottier · 2006
Multi-Carrier CDMA combines Orthogonal Frequency Division Multiplex with CDMA through symbol spreading in the frequency domain. Depending on the transmission scenario (indoor, outdoor urban or sub-urban) and the channel state information that may be available at the base station, several transmit antenna array strategies may be employed to mitigate the downlink multiple access interference while limiting the terminal complexity. Here, we present optimized system designs for several pre-filtering approaches such as joint space-frequency pre-filtering and space-only pre-filtering, i.e. beamforming.