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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Bibliographic Details
Published inIEEE wireless communications letters Vol. 8; no. 1; pp. 193 - 196
Main Authors Ramireddy, Venkatesh, Grossmann, Marcus, Landmann, Markus, Del Galdo, Giovanni
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.02.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
3GPP sub-band precoder
Bandwidths
Broadband
Channels
Delay
Delays
Feedback
Frequency-domain analysis
Millimeter waves
mmWave channels
OFDM
Precoding
space-delay precoder
time-domain precoder
Transmitting antennas
Wideband
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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.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2018.2866250