Performance Enhancement of MIMO-OFDMA: A Review Paper
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چکیده
OFDM multi-carrier modulation is expected to be the enabling technology for 4G wireless systems. One of the features that make OFDM the primary choice for 4G is its MIMO compatibility, because MIMO has a very significant potential of enhancing wireless systems for capacity, data rate, and coverage aspects. In this paper, the challenges of MIMO OFDM measurements are addressed and requirement of transmitting power control by user is discussed. Downlink power and uplink power is limiting factor in the performance of MIMO OFDMA system. An adequate power controlling mechanism based on closed loop of base station is solution to this problem.
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تاریخ انتشار 2013