Reduced Feedback Beamforming with a Large Antenna Array in Wireless Backhaul Downlink Systems 


Vol. 41,  No. 12, pp. 1903-1913, Dec.  2016


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  Abstract

In this paper, we propose 2-stage beamformer with linear receiver in wireless backhaul downlink system where macro base station has large antenna array with sub-array structure. Also, to compare the system capacity, we apply 3-stage beamformer with zero-forcing precoder and calculate the achievable sum rate of received small cell base stations. Considering scattering and path-loss property of wireless backhaul channel, we combine precoding technique for spatial multiplexing and beamforming technique to overcome path-loss. Therefore, we design DFT-based fixed beam patterns for the first stage. The simulation results show that considering spatial multiplexing, proposed 2-stage beamformer with linear receiver can increase the achievable sum rate as well as reduce the feedback information.

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  Cite this article

[IEEE Style]

J. Park, G. Kwon, H. Park, "Reduced Feedback Beamforming with a Large Antenna Array in Wireless Backhaul Downlink Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 41, no. 12, pp. 1903-1913, 2016. DOI: .

[ACM Style]

Jaebum Park, Girim Kwon, and Hyuncheol Park. 2016. Reduced Feedback Beamforming with a Large Antenna Array in Wireless Backhaul Downlink Systems. The Journal of Korean Institute of Communications and Information Sciences, 41, 12, (2016), 1903-1913. DOI: .

[KICS Style]

Jaebum Park, Girim Kwon, Hyuncheol Park, "Reduced Feedback Beamforming with a Large Antenna Array in Wireless Backhaul Downlink Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 41, no. 12, pp. 1903-1913, 12. 2016.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880