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Hierarchical precoding for ultra-dense heterogeneous networks

: Thiele, L.; Kurras, M.


Matthews, M.B. ; Naval Postgraduate School -NPS-, Monterey/Calif.; Institute of Electrical and Electronics Engineers -IEEE-; IEEE Signal Processing Society:
48th Asilomar Conference on Signals, Systems and Computers 2014. Vol.2 : Pacific Grove, California, USA, 2 - 5 November 2014
Piscataway, NJ: IEEE, 2014
ISBN: 978-1-4799-8295-0 (Print)
ISBN: 978-1-4799-8298-1
ISBN: 978-1-4799-8297-4
Asilomar Conference on Signals, Systems and Computers <48, 2014, Pacific Grove/Calif.>
Fraunhofer HHI ()

The need for cell densification leads to inter-cell interference mitigation techniques known as coordinated multipoint (CoMP) transmission and reception. In this work, we demonstrate the limits from joint regularized zero-forcing pre-coding within a cluster of several macro and small-cell base stations. While studying the effects of heterogeneous power constraints in such a cluster of transmission nodes, we develop a hierarchical precoding solution which mitigates the inter-cell interference from the macro-cells caused at the users mainly served by the small-cells. Due to significantly reduced transmit power budget both, inter-small-cell interference as well as interference from small-cells caused at the macro users is of less importance and hence is not taken into account within the precoding algorithm.