Cross-layer interference mitigation for cognitive radio MIMO systems

Zengmao Chen, Cheng-Xiang Wang, Xuemin Hong, John Thompson, Sergiy A. Vorobyov, Dongfeng Yuan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


In this paper, we investigate the interference mitigation from a cross-layer perspective for a cognitive radio (CR) multiple-input multiple-output (MIMO) network coexisting with a primary time-division-duplexing (TDD) system. The channel allocation in the media access control (MAC) layer and a subspace-based precoding scheme in the physical layer of the CR network are jointly considered to minimise the interference to the primary user and maximise the CR throughput. Two distributed cross-layer algorithms, namely, joint iterative channel allocation and precoding (JICAP) and non-iterative channel allocation and precoding (NICAP), are proposed for the cases with and without channel information among CR nodes, respectively. Moreover, a channel estimation scheme is also proposed to enable the NICAP. The effectiveness of the proposed algorithms over non-cross-layer counterpart is demonstrated via simulations.

Original languageEnglish
Title of host publicationProceedings of the 2011 IEEE International Conference on Communications
Number of pages6
ISBN (Electronic)978-1-61284-231-8
ISBN (Print)978-1-61284-232-5
Publication statusPublished - 2011
EventIEEE International Conference on Communications 2011 - Kyoto, Japan
Duration: 5 Jun 20119 Jun 2011


ConferenceIEEE International Conference on Communications 2011
Abbreviated titleICC 2011


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