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A Blind Beam Tracking Scheme for Millimeter Wave Systems

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Document pages: 6 pages

Abstract: Millimeter-wave is one of the technologies powering the new generation ofwireless communication systems. To compensate the high path-loss,millimeter-wave devices need to use highly directional antennas. Consequently,beam misalignment causes strong performance degradation reducing the linkthroughput or even provoking a complete outage. Conventional solutions, e.g.IEEE 802.11ad, propose the usage of additional training sequences to track beammisalignment. These methods however introduce significant overhead especiallyin dynamic scenarios. In this paper we propose a beamforming scheme that canreduce this overhead. First, we propose an algorithm to design a codebooksuitable for mobile scenarios. Secondly, we propose a blind beam trackingalgorithm based on particle filter, which describes the angular position of thedevices with a posterior density function constructed by particles. Theproposed scheme reduces by more than 80 the overhead caused by additionaltraining sequences.

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