Precoding Matrix Selection for LTE System

Li, Chi-Min; Li, Yi-Ru

doi:10.1007/s11277-021-08192-x

Cited by 1 publication

(1 citation statement)

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“…To reduce the required RF chains as in the analog beamforming, it may adopt the hybrid beamforming that conducting precoding at both the RF and base band (BB) [9,10]. For our related works [11,12], it conducts the precoding at the BB to avoid the intensive energy consumption and is compatible with the specification requirements. In this paper, a low computational complexity 5G BB precoding selection method is proposed based on the steering angle characteristics of the precoding matrices.…”

Section: Introductionmentioning

confidence: 99%

Low Computational Complexity Precoding Selection for 5G New Radio

Huang

Wang

2023

Preprint

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In the fifth generation (5G) new radio (NR) wireless communication system, using Multiple Input Multiple Output (MIMO) system for signal transmission and reception of the millimeter wave frequency band can effectively improve the data rate performance and the received signal quality. Besides, precoding is an important method of beamforming in MIMO transmission. With the properly selected precoding matrices, transmitter and receiver can adjust the transmitting and receiving behaviors in accordance with the changes of the current channel state to reduce the interferences between users and increase the received signal strength. In this paper, a low complexity precoding selection method is proposed based on the steering angle characteristics of the precoding matrices of 5G NR. Besides, we used the software defined radio to implement the precoding selection following the requirement of the specifications of 5G. With this implementation, both transmitter and receiver can determine the suitable precoding matrices according to different precoding selection methods. Results showed that with a little error vector magnitude performance degradation, the proposed precoding selection method can reduce at least 50% of the required computational complexity of the full search method.

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