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Consider a MIMO interfering broadcast channel (multi-cellular network) where each base station transmits signals to the users in its own cell. The basic problem is to design linear transmit/receive beamformers that can maximize the system throughput in the presence of both inter and intra cell interference. To ensure user fairness in the system, we consider the joint user grouping, power allocation...
Channel inversion, and its minimum mean square error (MMSE) variation, are low complexity methods for space division multiple access (SDMA) in multiple input multiple output broadcast channel (MIMO-BC). As the channel matrix deviates from orthogonal, these methods result in a waste of transmit power. This paper proposes a trellis precoding method (across time and space) to improve the power efficiency...
Vector precoding is arguably the best form of precoding for the multi-user multiple input multiple output (MIMO) broadcast channel. However, conventional vector precoding schemes are designed to minimize the transmit energy, which is suboptimal in terms of the received signals mean square error (MSE). This paper proposes modifications to vector precoding to overcome this shortcoming. Improvements...
When transmitting over the multi-user MIMO broadcast channel, the transmitter has both knowledge of, and control over, the interference between users. Methods based on interference cancellation focus only on the transmitter's knowledge of the interference. This paper proposes a method which takes advantage of the transmitter's control over the interference among users. This is done by considering...
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