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By retransmission and combining multiple copies of a packet, conventional hybrid ARQ (automatic-repeat-request) schemes are effective to increase the SNR (signal-to-noise ratio) of received signal but not capable of reducing ICI (inter-carrier interference). This paper proposes an adaptive HARQ scheme, which incorporates ICI cancellation into the conventional IR (incremental redundancy)-based HARQ...
Cooperative multiple input multiple output (MIMO) system is capable in mitigating co-channel interference (CCI) that limits the downlink capacity of cellular network. Among the joint transmission designs for base station (BS) cooperation, the linear joint transmissions with per-base power constraint is preferred due to its computational simplicity and reality. However, since the transmissions with...
In this paper, interference mitigation through downlink power control is considered for macrocell Femtocell overlay. Specifically, the strong interference in the downlink from the home base station to a nearby macrocell user should be properly controlled such that the quality-of-service of both the macrocell user and the Femtocell users can be guaranteed. In this work, the fundamental capacity limitation...
Recent results establish the optimality of interference alignment to approach the Shannon capacity of interference networks at high SNR. However, the extent to which interference can be aligned over a finite number of signalling dimensions remains unknown. Another important concern for interference alignment schemes is the requirement of global channel knowledge. In this work we provide examples of...
Mismatches in the response of the components used in the analogue front-ends of adaptive beamformers can reduce their ability to produce deep nulls against broadband interferers. These mismatches can be removed through a process of calibration performed at start-up and, if required, on a regular basis to track changes in the componentpsilas response due to environmental changes. In this paper a hardware...
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