Multi-Polarization Superposition Beamforming with XPD-Aware Transmit Power Allocation

Seungcheol Oh

Abstract:

The 5th generation (5G) new radio (NR) access
technology and the future wireless communication require extremely high data rate and spectrum efficiency. Energy-efficient
transmission/reception schemes are also regarded as an important
component in 5G and beyond-5G communication systems. Based
on this motivation, the polarization domain has attracted substantial attention; however, is not as fully utilized in a systematic
manner as conventional time, frequency, and spatial domains.
This paper is the first to propose multi-polarization superposition beamforming (MPS-Beamforming) with cross-polarization
discrimination (XPD)-aware transmit power allocation utilizing
the 5G antenna panel structure. The detailed mathematical
derivation along with comprehensive simulation results are provided. Both the theoretical analysis and simulation results exhibit
that the proposed scheme of MPS-Beamforming is significantly
beneficial to the improvement of the performance in terms of the
symbol error rate (SER) and signal-to-noise ratio (SNR) at the
user equipment (UE). For instance, one of the simulation results
in a practical scenario exhibits 7.5 dB SNR gain for 7 × 10−3
SER.