December 1, 2022

USI 5G RF Handheld Device – VAD6490 supports SRS

SHANGHAI, November 8, 2022 /PRNewswire/ — In recent years, telecom operators such as China Mobile Communications Corporation (CMCC) have included SRS as one of the fundamental and necessary functions (for n41/n79 band). In addition, many telecommunications operators in North America have included SRS in their list of support features for smart terminal products. It reveals that SRS is playing an increasingly important role in improving the experience of subscribers using 5G wireless wide area network (WWAN). USI recently successfully developed VAD6490, a 5G portable device with SRS function for industrial use.

“VAD6490 is deployed with HB’s n41 and UHB’s n77/78/79 and has completed SRS-related function verification. By establishing connection with ANRITSU MT8000A 5G sub-6 base station simulation tester, we can observe related information such as antenna port used by SRS, power settings, queuing and scheduling on channels from Qualcomm’s QXDM logs. When combined with the SRS function, the VAD6490 5G handheld device for industrial use will provide more accurate signal estimation and channel understanding. As a result, subscribers will experience faster download rate.” said Leo TaiSenior Director of Intelligent Connectivity Solutions, USI.

With the rapid popularization of 5G applications worldwide, wearable devices are experiencing a dramatically increasing demand for the quantity and design complexity of RF antennas. In terms of WWAN, the framework has evolved from two antenna mode (primary + secondary) in the LTE era to six or more antenna mode in the 5G NR era and has become a typical design architecture today. . However, designing more antennas in a limited space is becoming increasingly difficult as market demand for lightweight and thin portable devices continues to grow.

USI has a team of antenna development talents with rich experiences. The company’s 5G lab is equipped with multiple 5GNR OTA chambers to meet development and verification requirements related to FR1 and FR2. In addition, the laboratory is built with an antenna and an electromagnetic wave simulation system. Its multimillion-valued computer workstation has two graphics processing units (GPUs), which can greatly speed up simulation efficiency and improve simulation accuracy. Therefore, customers can receive more perfect simulation data required for antenna system design evaluation and regulatory certification during project development. This simulation data includes antenna efficiency, radiation pattern, SAR, HAC and millimeter wave antenna power density, etc.

In order to bring faster and more stable network services than 4G, 5G NR has been added with many new functions and mechanisms in RF and antenna design. At USI, the Antenna and RF team has helped customers develop and design a significant number of 5G products. The company’s 5G lab has a robust simulation system and a complete set of measuring instruments to provide a one-stop, fast and comprehensive service for the development and verification of 5G-related projects. USI can help customers improve their product competitiveness by dramatically shortening development time and optimizing product performance to meet their rapid development and time-to-market needs.

In addition to providing sophisticated support for simulation and hardware devices, USI has also continued to improve the application of 5G MIMO-related technologies, and Sounding Reference Signal (SRS) is one of them. Among the design of mainstream 5G mobile phones, 1T4R (one transmitter and four receivers, for NSA) and 2T4R (two transmitters and four receivers, for SA) have become a typical design of SRS, especially at the TDD spectrum. . Since they operate at the same frequency and the uplink and downlink channels are reciprocal, the equipment’s four antennas can take turns sending reference signals to the base station. The base station performs channel estimation more accurately based on the received signals. It then performs intelligent distribution and allocates the data to be transmitted proportionally to the four channels based on the calculation results to optimize the data transmission quality.

Check out the USI blog for more information on USI 5G Lab introduction and features.

About USI

USI (SSE: 601231, a constituent of the CSI300 index), Universal Scientific Industrial (Shanghai) Co., Ltd., is a global leader in electronics design and manufacturing as well as a leader in System-in-Package (SiP) modules. USI provides D(MS)2 product department: Ddesign, Mmanufacturing, Miniaturization, industrial software and hardware Ssolutions, and material supply, logistics and maintenance Sservices. With Asteelflash, USI has 28 sales, production and service sites on four continents Asia, EuropeAmericas and Africa, and provides customers with diversified products in wireless communication, computing and storage, consumer electronics, industrial, medical and automotive industries worldwide. USI is a subsidiary of ASE Technology Holding Co., Ltd. (TWSE: 3711, NYSE: ASX). To learn more, visit and connect with us on LinkedIn and YouTube.