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A DOA-Based Spatial Information Focusing Scheme for Mobile Multi-users in A 2 × 1 MISO System

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Abstract

In the conventional beamforming-based transmitting scheme for a multiple-input single-output (MISO) system, many transmitting antennas are usually required. In this paper, a direction of arrival (DOA) based spatial focusing scheme for a 2 × 1 MISO system is proposed. This 2 × 1 MISO system, can be employed for local or indoor communications, requires only one single and two antennas at the mobile station and the base station respectively. In the system, orthogonal-frequency-division-multiplexing (OFDM) is employed for the uplink and ultra wide band pulse is employed for the downlink. Firstly, based on the characteristics of OFDM, a multi-carriers DOA estimation algorithm is proposed to estimate the DOAs of multiple OFDM signals by using only two antennas, even the signals are coherent. Secondly, by using a fusion approach which fuses the estimated DOAs and an existing fixed focusing method, the spatial information focusing for mobile multi-users can be achieved. Numerical examples are provided to demonstrate the effectiveness of the proposed approach.

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Acknowledgements

The work in this paper was supported by the National Natural Science Foundation of China (Grant No. 61071159), the National High Technology Research and Development Program of China (863 Program) (Grant No. 2012AA01A502), the National Natural Science Foundation of China (Grant No. 61179006), and the Science and Technology Support Program of Sichuan Province (Grant No. 2014GZX0004).

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Correspondence to Yong Zhang.

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Zhang, Y., Zhu, L., He, P. et al. A DOA-Based Spatial Information Focusing Scheme for Mobile Multi-users in A 2 × 1 MISO System. Wireless Pers Commun 96, 1835–1848 (2017). https://doi.org/10.1007/s11277-017-4271-7

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