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To realize extremely high data rate of 50M-1Gbps in the 4G era, innovative circuit technologies for wider bandwidth and higher spectrum efficiency are required. In addition, some technical problems arise from increasing network density. For these technical challenges, we are developing the system technologies of inter-cell interference coordination and flexible mobile backhaul, and the circuit technologies...
In this paper, we propose a signal processing technique for blindly separating constant modulus sources in wireless communication systems. With the proposed technique, each source is pre-filtered using a unique allpass filter that we refer to here as a transmit tagging filter (TT-filter). At the receiver, an inverse model of the TT-filter is used to blindly equalize a multiple input multiple output...
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