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In this paper we propose a joint transmission scheme for LTE-CoMP using a single codeword to transmit from multiple transmission points to a single UE. Transmission with a single codeword makes the signal better aligned with the dominant eigenmode of the channel and achieves higher capacity. A design methodology of the global codebook for joint transmission from two transmission points is developed...
In this paper, an efficient power allocation scheme of reference signals (RS) for uplink MU-MIMO in LTE system is introduced. In LTE system, some virtual subcarriers at the borders of the allocated bandwidth are used which invalidates the conventional power allocation schemes for uniformly placed reference signal. Further, RS for multiuser are multiplexed by cyclic shift. Constant power is required...
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