Qualcomm and ZTE have completed a series of interoperability tests for 5G-A technologies under the organization of the IMT-2020 (5G) Promotion Group. The testing utilized Qualcomm's X105 5G modem and RF system to validate key performance metrics across multiple frequency bands.
The companies verified High Power User Equipment (HPUE) capabilities for both FDD and TDD bands. For FDD, tests were conducted in the n1 and n28 bands at a 26dBm power level. For TDD, tests in the n41 and n78 bands reached a 29dBm power level, aiming to improve uplink coverage at cell edges.
The testing included Supplemental Uplink (SUL) technology in the n95 and n98 bands to enhance data transmission stability. Additionally, the partners validated Layer 1-based fast waveform switching, allowing dynamic transitions between DFT-s-OFDM and CP-OFDM based on channel conditions.
A significant portion of the testing focused on on-device AI and machine learning for beam management. In the n258 band, the system used 12 input wide beams to predict 24 output narrow beams, reducing signaling overhead and measurement load for the terminal.
