Adaptive limited feedback for intercell interference cancelation in cooperative downlink multicell networks

We consider the applications of multicell transmission schemes to the downlink of future wireless communication networks. A multicell multiple-input multiple output-(MIMOs) based scheme with limited coordination among neighboring base stations (BSs) is proposed to effectively combat the intercell interference by taking advantage of the degreesoffreedom in the spatial domain. In this scheme, mobile users are required to feedback channel-related information to both serving base station and interfering base station. Furthermore, a chordal distance-based compression scheme is introduced to reduce the feedback overhead. The performance of the proposed scheme is investigated through theoretical analysis as well as system level simulations. Both results suggest that the so-called “intercell interference coordination through limited feedback” scheme is a very good candidate for improving the cell-edge user throughput as well as the average cell throughput of the future wireless communication networks.

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Sparsity Enhanced Mismatch Model for Robust Spatial Intercell Interference Cancelation in Heterogeneous Networks

IEEE Transactions on Communications ◽

10.1109/tcomm.2014.2369037 ◽

2015 ◽

Vol 63 (1) ◽

pp. 125-139 ◽

Cited By ~ 5

Author(s):

Chieh-Yao Chang ◽

Carrson C. Fung

Keyword(s):

Heterogeneous Networks ◽

Intercell Interference ◽

Interference Cancelation

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Iterative Intercell Interference Cancellation in MIMO Multicell Networks

Wireless Communications and Mobile Computing ◽

10.1155/2018/3526906 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8

Author(s):

Zhengzhen Zhang ◽

Chao Dong ◽

Qian Wan

Keyword(s):

Interference Cancellation ◽

Mean Squared Error ◽

Base Station ◽

Intercell Interference ◽

Minimum Mean Squared Error ◽

Squared Error ◽

Pilot Allocation ◽

Receiver Performance ◽

Multicell Networks

An iterative intercell interference cancellation algorithm is introduced to improve the receiver performance of uplink transmission in multicell networks. At first, the uplink signal detection is performed independently in each cell according to minimum mean squared error (MMSE) criterion. Subsequently, the detection results are applied to reconstruct the transmit signals of different users and cancel their interference to neighboring cells. With the help of reconstruction results, the MMSE detection matrix of each cell is updated. The channel responses of both efficient and interference links are estimated with the help of pilots. The pilot allocation parameter is introduced to indicate the quality of channel estimation. The simulation results indicate that intercell interference can be greatly mitigated by the proposed algorithm with a moderate number of receiver antennas at the base station.

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