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Small cells form a critical component of next generation cellular networks, where spatial reuse is the key to higher spectral efficiencies. Interference management in the spatial domain through beamforming allows for increased reuse without having to sacrifice resources in the time or frequency domain. Existing beamforming techniques for spatial reuse, being coupled with client scheduling, face a...
In this paper, we develop low-complexity methods to compute the soft symbol and variance estimations for QAM constellations with applications to iterative MMSE-SIC receivers. In particular, we propose a bit flipping based estimation scheme. For an N-QAM constellation with Gray mapping, we derive efficient approaches for both soft symbol and variance estimations with the complexities of O(log N) and...
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