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Zero-Forcing Spatial Interweave with Greedy Scheduling

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Abstract

We propose a method that allows opportunistic shared channel utilization in multi-user multiple-input multiple-output systems, without causing any interference towards the primary system. It is shown that with appropriate exploitation of demodulation pilot signaling, the opportunistic system can quantify all the necessary information in order to guarantee complete interference mitigation towards the primary system. Opportunistic signal space utilization is based on the assumption of reciprocal zero-forcing transmitter and receiver design in the primary system and use of time division duplexing. Linear beamforming is coupled with greedy scheduling for efficient exploitation of multi-user diversity in both the primary system and the cognitive systems.

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Acknowledgments

This work has been supported by the Finnish Funding Agency for Technology and Innovation (Tekes), Elektrobit, Nokia, Nokia Siemens Networks (NSN), Uninord, Xilinx and Renesas Mobile Europe.

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Authors and Affiliations

  1. Centre for Wireless Communications, University of Oulu, P.O. Box 4500, 90014 , University of Oulu, Finland

    Jarkko Kaleva, Petri Komulainen, Markku Juntti & Antti Tölli

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  1. Jarkko Kaleva
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  2. Petri Komulainen
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  3. Markku Juntti
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  4. Antti Tölli
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Correspondence to Jarkko Kaleva.

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Kaleva, J., Komulainen, P., Juntti, M. et al. Zero-Forcing Spatial Interweave with Greedy Scheduling. Wireless Pers Commun 72, 1649–1662 (2013). https://doi.org/10.1007/s11277-013-1126-8

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  • DOI: https://doi.org/10.1007/s11277-013-1126-8

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