5G network will need to increase capacity and flexibility while reducing system operating costs (OPEX). To increase capacity, the easiest way is to increase the number of base stations in the network. However, since this method brings high real estate and energy cost, it is limited. More efficient ways is to use a large number of transceiver antenna elements with amplitude and phase control. These components are referred to as a large-scale MIMO system. You can use a variety of ways to operate such system. For such systems, multiple precoded data streams can be supported by space multiplexing, and / or increase gain through beamforming.
In a mature SUB-6 GHz spectrum, the base station typically provides services to multiple users using a large number of internet data. This is called multi-user MIMO (MU-MIMO). In contrast, high-path loss attenuate in centimeter wave and millimeter wave requires a higher antenna gain, which can be implemented by applying dynamic beamforming. For each user equipment, the power consumption can be significantly reduced for its distribution signal. MU-MIMO and beamforming can increase the cell capacity without additional increase in the base station.
5G test challenge
When designing a large-scale MIMO active antenna system, development engineers face new challenges, including phase shifter tolerance, thermal amplifier (PA) thermal effect, and frequency drift between modules, which affect the desired beam pattern. In an active antenna system, the front end of the transceiver is integrated with an antenna array, so the traditional RF output port is no longer available. In addition, the fiber optic interface replaces the traditional RF input port for digital I / Q data. Therefore, wireless (OTA) tests become the default cases of a large-scale MIMO system, and can also be used to simulate the spatial properties of the propagation channel. Due to the size of the large-scale MIMO system, there is a need for a variety of shielding environments when tested under far field conditions.
Rhodes and Schwarz provide a comprehensive one-stop test solution combination that performs OTA for traditional SUB-6 GHz cellular frequencies and centimeters and millimeter wavefring 5G modules, devices, and large-scale MIMO active antenna systems. Measurement:
The turnkey test solution includes all required tests and measuring instruments, antennas and accessories
Class wave and millimeter wave user equipment Test: Scalable portable R & S®ATS1000 shielded dark room, including integrated high-precision cone cutting positioner and laser option, suitable for correct path loss calibration and accurate test equipment correction
Available Silver solution for R & S®ATS1000, a mobile device can be tested under extreme temperature conditions, and the thermal effects of -20 ° C to + 85 ° C temperature range are studied by using external heat flow.
Accurate and fast SUB-6 GHz large-scale MIMO base station test: extremely compact innovation R & S®PWC200 flat wave converter can generate a 3D spherical static zone having a diameter 1 m at a distance of 1.5 m, real-time radiation power and transceiver measurement
Work closely with Albatross Projects to provide a variety of standardized wireless performance laboratory (WPTC) to meet customers' live requirements
Combined with the R & S®zva four-port network analyzer and R & S®AMS32 measurement and control software, 2D / 3D mode characteristic analysis can be performed, including near field (NF) to far field (FF) conversion
Combined with the R & S®SMW200A vector signal generator and the R & S®FSW spectrum and signal analyzer, comprehensive radio frequency transceiver characteristics can be performed, such as key performance indicators such as EVM using modulated signals.
R & S®OSP open exchange and control platform options simplify system interior interconnection
Additional R & S®NRPM OTA Power Probes can perform power measurements in a dedicated location, such as beam control testing
Our other product:
