Interference Coordination in Cognitive Radio Systems
5G communication network is viewed as a “cognitive network” since it is featured by the coexistence of multiple communication systems. Therefore, cognitive radio will play a key role in 5G communication systems. In this chapter, we present interference coordination techniques for cognitive radio systems, which enable the secondary systems to exploit the spatial spectrum hole of primary systems. First, the cognitive interference network is considered, where both primary and secondary system are point-to-point MIMO. An interference coordination scheme is introduced to eliminate the interference on the primary system. Then, a cognitive uplink network is studied, where the secondary system becomes a uplink network. We present an opportunistic user scheduling scheme to improve the performance of secondary system by relaxing the interference constraint of primary system and taking advantage of multiuser diversity.
KeywordsCognitive Radio Secondary User Cognitive Radio Network Primary System Primary Receiver
- 11.Amir, M., El-Keyi, A., & Nafle, M. (2010). Opportunistic interference alignment for multiuser cognitive radio. In Proceedings of the IEEE Information Theory Workshop, Cairo, 6–8 Jan 2010.Google Scholar
- 16.Yang, L., & Zhang, W. (2013). Opportunistic interference alignment in heterogeneous two-cell uplink network. In Proceedings of the IEEE Interantional Conference on Communications (ICC 2013), Budapest, pp. 5448–5452, 9–13 June 2013.Google Scholar
- 19.Zhang, W., & Letaief, K. B. (2008). Opportunistic relaying for dual-hop wireless MIMO channels. In Proceedings of the IEEE Global Communications Conference (GLOBECOM 2008), New Orleans, 30 Nov–4 Dec 2008.Google Scholar
- 20.Yang, L., Zhang, W., Zheng, N., & Ching, P. C. (2014). Opportunistic user scheduling in MIMO cognitive radio networks. In Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2014), Florence, pp. 7303–7307, 4–9 May 2014.Google Scholar