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Low complexity equalization algorithms for frequency selective millimeter wave channel

Authors:
Wang, G. ,  Sun, J. ,  Ascheid, G.
Editors:
Ascheid, G.
Book Title:
Proceedings of IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
Publisher:
IEEE
Pages:
p.p. 1-7
Date:
Oct. 2017
DOI:
10.1109/PIMRC.2017.8292485
hsb:
RWTH-2018-221545
Language:
English

Abstract

In this paper the millimeter wave (mmWave) single carrier transmission systems operating on wideband channels with frequency selectivity are considered. We propose two frequency selective hybrid precoding solutions, namely time delay compensation (TDC) based time domain equalization (TDE) and phase shift compensation (PSC) based frequency domain equalization (FDE). First, we implement a sectorized beamforming in RF domain to compensate the large path-loss at mmWave range and reduce the intra cluster delay spread. Here, the RF precoder is assumed to be frequency flat during one block transmission due to the independence of RF precoder design on the time delay spread. Subsequently, adopting TDC for TDE and PSC for FDE in digital baseband to reduce frequency selectivity, the baseband precoder is designed to maximize the achievable capacity. Finally, numerical results indicate that the proposed equalization algorithms can achieve a comparable performance with respect to the flat channel case.

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