Efficient Precoding for Single Carrier Modulation in Multi-User Massive MIMO Networks

Conference · Fri Aug 06 04:00:00 EDT 2021

OSTI ID:1818302

Kenney, Brent A. ^[1]; Majid, Arslan J ^[2]; Moradi, Hussein ^[2]; Farhang-Boroujeny, Behrouz ^[3]

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1. University of Utah PhD student
2. Idaho National Laboratory
3. University of Utah professor

Abstract—Frequency domain (FD) multi-user detection (MUD) and precoding has been shown to be an effective means of approaching the theoretical per-user capacity for single carrier modulation (SCM) schemes in massive MIMO scenarios with highly dispersive channels. When a cyclic prefix is added to the SCM waveform, the circulant structures of the resulting convolutional channel matrix allows for relatively simple expressions for the FD detection and precoding. In this paper, we further refine the computationally efficient minimum mean squared error (MMSE) FD-MUD technique in a time-division duplexing (TDD) massive MIMO setup by pre-computing the scale factor needed to produce an unbiased estimate. The resulting scale factor and the matrix inverse that was calculated for the uplink is then reused for the downlink to form a computationally efficient precoding scheme with superior performance compared to zero-forcing (ZF) precoding. Performance analysis is provided and confirmed through simulation results.

• Research Organization: Idaho National Laboratory (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC07-05ID14517
• OSTI ID: 1818302
• Report Number(s): INL/CON-20-60127-Rev000
• Country of Publication: United States
• Language: English

Related Subjects

5G and Beyond Communications
99 GENERAL AND MISCELLANEOUS
CP-DSSS
Downlink Precoding with Matrix Inversion Reuse
Filter-bank Multi-Carrier Spread Spectrum System
Frequency Domain Multi-User Detection
Single Carrier Modulation with Cyclic Prefix
Wireless Communications