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Sensors 2016, 16(7), 1129;

Efficient Preamble Design Technique for Millimeter-Wave Cellular Systems with Beamforming

School of Electrical and Electronic Engnineering, Chung-Ang University, Seoul 156-756, Korea
LG Electronics, Seoul 137-893, Korea
Author to whom correspondence should be addressed.
Academic Editor: Yonghui Li
Received: 29 April 2016 / Revised: 13 July 2016 / Accepted: 18 July 2016 / Published: 21 July 2016
(This article belongs to the Special Issue Millimeter Wave Wireless Communications and Networks)
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The processing time for beam training in millimeter-wave (mmWave) cellular systems can be significantly reduced by a code division multiplexing (CDM)-based technique, where multiple beams are transmitted simultaneously with their corresponding Tx beam IDs (BIDs) in the preamble. However, mmWave cellular systems with CDM-based preambles require a large number of cell IDs (CIDs) and BIDs, and a high computational complexity for CID and BID (CBID) searches. In this paper, a new preamble design technique that can increase the number of CBIDs significantly is proposed, using a preamble sequence constructed by a combination of two Zadoff-Chu (ZC) sequences. An efficient technique for the CBID detection is also described for the proposed preamble. It is shown by simulations using a simple model of an mmWave cellular system that the proposed technique can obtain a significant reduction in the complexity of the CBID detection without a noticeable performance degradation, compared to the previous technique. View Full-Text
Keywords: millimeter-wave; beam-training; Zadoff-Chu sequence; beamforming; OFDM millimeter-wave; beam-training; Zadoff-Chu sequence; beamforming; OFDM

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Han, D.G.; Kim, Y.J.; Cho, Y.S. Efficient Preamble Design Technique for Millimeter-Wave Cellular Systems with Beamforming. Sensors 2016, 16, 1129.

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