Multiple antenna two-way relay networks

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Traditional mobile/wireless systems that use single-antennas terminals (ie handsets and base-stations etc) cannot keep up with the user demand for increased data rates. Consequently, multiple-input multiple-output (MIMO) or "multiple-antenna technology" has been developed, which achieves higher data rates and better link reliability than conventional single-antenna systems. It has already been deployed in the third generation broadband wireless networks, wireless local area networks (802.11n) and will also be an integral technology for fourth generation networks (e.g. long-term evolution (LTE)). However, small phone handsets cannot support multiple-antennas owing to constraints on physical size, batterypower. This constraint has led to the idea of cooperative relay networks. The promise of cooperative relaying has already led to evolving standards (e.g. IEEE 802.16j). Such relaying can be further extended to multiple-antenna relay networks. This approach is feasible for most broadband terminals, wireless laptops and broadband wireless switches, for instance, that can accommodate multiple antennas. This project will focus more on communication technologies for multiple-antenna two-way relaying systems. For instance, channel and frequency estimation methods, signaling methods, and practical coding and decoding techniques will be developed. The MIMO two-way relay technology is the solution for the next generation energy, bandwidth efficient wireless networks. The proposed research thus aims to develop related MIMO, OFDM, CR and relay technologies, contributing to the advancement of 4G wireless standards such as IMT-A.