Sub-Band Versus Space-Delay Precoding for Wideband mmWave Channels
Precoding for frequency-selective multiple-input single output channels is often performed on a sub-band basis in frequency-domain. Such sub-band precoding will also be adopted in the upcoming 3GPP Release 15 New Radio. Exploiting the large available bandwidth at millimeter-Wave (mmWave) frequencies...
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Published in | IEEE wireless communications letters Vol. 8; no. 1; pp. 193 - 196 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Piscataway
IEEE
01.02.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
Online Access | Get full text |
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Summary: | Precoding for frequency-selective multiple-input single output channels is often performed on a sub-band basis in frequency-domain. Such sub-band precoding will also be adopted in the upcoming 3GPP Release 15 New Radio. Exploiting the large available bandwidth at millimeter-Wave (mmWave) frequencies will significantly increase the number of sub-bands, and hence the feedback overhead when sub-band precoding is applied. In this letter, we propose a precoding scheme that exploits the sparsity of mmWave channels by performing precoding in the space-delay domain. It is shown that the proposed precoder outperforms the former in terms of average mutual information and reduces the feedback overhead. |
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ISSN: | 2162-2337 2162-2345 |
DOI: | 10.1109/LWC.2018.2866250 |