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We consider a time-division duplex (TDD) two-tier network, comprising macro- and femtocells coexisting in a co-channel operation mode, in which inter- and intra-tier interference are incurred. The proposed cell selection accounts for both uplink and downlink capacities. Comparison is made with path loss based and received signal strength based cell selections. Through simulation, we evaluate the performance...
In multi-cell OFDMA systems, inter-cell interference can severely degrade the system throughput, particularly for cell-edge users. To mitigate the inter-cell interference problem, interference coordination is a promising approach that effectively restricts and allocates certain resources among users in different cells to minimize the effect of inter-cell interference. However, most approaches are...
We propose an improved beamforming matrix compression by givens rotation with the use of variable feedback rate. The variable feedback rate means that the number of bits used to represent the quantized beamforming matrix is based on the value of the matrix. Compared with the fixed feedback rate scheme, the proposed method has better performance without additional feedback bandwidth.
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