Precoding and Detection for Broadband Single Carrier Terahertz Massive MIMO Systems Using LSQR Algorithm
Artikel i vetenskaplig tidskrift, 2019

The terahertz (THz) communication utilizes the frequency spectrum above 300 GHz and is widely considered as a promising solution to the future high-speed short-range wireless communication beyond millimeter wave (mmWave) communication. While providing tens of gigahertz bandwidth, it is subjected to high propagation path loss, inter-symbol and inter-user interferences. The massive multiple-input- multiple-output (MIMO) can be applied to address these problems by cooperation between many access point (AP) antennas. However, the THz channel characteristics, including high propagation path loss, frequency selectivity and big number of samples per channel impulse response (CIR), require carefully tailored algorithm for massive MIMO signal processing. In this paper, we propose a single carrier minimum mean square error (MMSE) precoding and detection algorithm for frequency selective THz channels. The MIMO signal transmission is described with the block matrices. A gain control heuristic is introduced to reduce the complexity. The sparsity property of the channel is utilized to construct sparse channel matrices and the least square QR (LSQR) algorithm is applied to efficiently solve the problems. Besides the uniform antenna array, the hybrid array consisting of several subarrays is considered as well. Simulation results show that the massive MIMO array can provide a satisfactory performance in terms of bit error rate (BER).

massive MIMO

precoding

detection

LSQR algorithm

frequency selective channel

block matrix

THz communication

MMSE

Författare

Bile Peng

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Technische Universität Braunschweig

Stefan Wesemann

Nokia Bell Labs

Ke Guan

Beijing Jiaotong University

Wolfgang Templ

Nokia Bell Labs

Thomas Kürner

Technische Universität Braunschweig

IEEE Transactions on Wireless Communications

1536-1276 (ISSN)

Vol. 18 8599164 1026-1040

Ämneskategorier

Telekommunikation

Kommunikationssystem

Signalbehandling

DOI

10.1109/TWC.2018.2889056

Mer information

Senast uppdaterat

2019-06-17