Multiple-input Multiple-output Cooperative Networks Research Articles

Outage performance of MIMO cooperative networks with selective OFDMA relaying

The multiple-input multiple-output (MIMO) cooperative networks with selective orthogonal frequency division multiplexing access (OFDMA) relaying, where transmit beamforming and maximum ratio combining are carried out at source transmission and destination reception, respectively, are considered. The closed-form expression of outage probability is investigated to statistically assess the performance of systems. The impact of number of relays on the outage performance under arbitrary Nakagmi-m fading channels is analysed. Results reveal that increasing the number of relays is not always necessary for the improvement of outage performance and there has been the right relay configuration to guarantee the outage performance and reduce the complexity for relay networks.

Multi-Cell MIMO Cooperative Networks: A New Look at Interference

This paper presents an overview of the theory and currently known techniques for multi-cell MIMO (multiple input multiple output) cooperation in wireless networks. In dense networks where interference emerges as the key capacity-limiting factor, multi-cell cooperation can dramatically improve the system performance. Remarkably, such techniques literally exploit inter-cell interference by allowing the user data to be jointly processed by several interfering base stations, thus mimicking the benefits of a large virtual MIMO array. Multi-cell MIMO cooperation concepts are examined from different perspectives, including an examination of the fundamental information-theoretic limits, a review of the coding and signal processing algorithmic developments, and, going beyond that, consideration of very practical issues related to scalability and system-level integration. A few promising and quite fundamental research avenues are also suggested.