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Recently, amorphous cells emerge as a promising paradigm in cellular networks to support bursty traffic caused by the user mobility, where dense small cells can cooperate on data delivery to mobile users thus implementing coverage without definite cell shape. In this paper, we propose a novel small cell deployment scheme, aiming at optimizing the network(More)
In this paper, we develop an iterative receiver with interference suppression for long term evolution (LTE) downlink systems. The key challenge here is how to accurately estimate the channel state information and spatial covariance matrix of interference by using limited available pilots in LTE systems to improve the interference capability and the(More)
Adaptive codebook makes the codebook-based precoding vectors change adaptively with the channels by including the spatial covariance. However, the large intervals of the long-term (typically 20ms or even longer) feedback often incur a sharp performance loss in high-speed scenarios. In this paper, per-cell codebook design for separately quantizing local(More)
To deal with problems that queuing information is not included in cognitive information when performing Resource Allocation (RA), a dynamic cross-layer scheme is proposed for the multimedia cognitive radio (CR) system with Orthogonal Frequency Division Multiplexing (OFDM). In this scheme, we consider that several crucial factors influence the RA decision,(More)