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http://dx.doi.org/10.7840/kics.2017.42.1.25

Compressed Sensing Techniques for Millimeter Wave Channel Estimation  

Han, Yonghee (Department of Electrical Engineering, INMC, Seoul National University)
Lee, Jungwoo (Department of Electrical Engineering, INMC, Seoul National University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.42, no.1, 2017 , pp. 25-30 More about this Journal
Abstract
Millimeter wave (mmWave) bands are expected to improve date rate of 5G systems due to the wide available bandwidth. While severe path loss in those bands has impeded the utilization, short wavelength enables a large number of antennas packed in a compact form, which can mitigate the path loss. However, estimating the channel with a conventional scheme requires a huge training overhead, hence an efficient estimation scheme operating with a small overhead needs to be developed. The sparsity of mmWave channels caused by the limited scatterers can be exploited to reduce the overhead by utilizing compressed sensing. In this paper, we introduce compressed sensing techniques for mmWave channel estimation. First, we formulate wideband channel estimation into a sparse recovery problem. We also analyze the characteristics of random measurement matrix constructed using quantized phase shifters in terms of mutual incoherence.
Keywords
Millimeter wave communications; channel estimation; compressed sensing; analog beamforming;
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Times Cited By KSCI : 3  (Citation Analysis)
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