OVER-THE-AIR (OTA) TESTING
PCTEST’s OTA performance and certification testing ensure accurate, repeatable, and comprehensive performance characterization testing of wireless devices to include, but not limited to, handsets, laptops, tablets, wrist-worn devices, modules, access points, and IoT devices.
Certification testing is performed to meet industry, operator and/or CTIA/PTCRB/GCF standards to ensure devices achieve effective radiated spatial performance. Depending on test device type, measurements are made in various configurations using standards-compliant phantoms: Free-Space, Head & Hand for Talk Mode, and Hand-Only for Data Mode. Wrist-worn devices are evaluated with an industry-accepted Forearm Phantom. Testing Services available include:
- CTIA Test Plan for Wireless Device Over-the-Air Performance
- CTIA Test Plan for 2×2 Downlink MIMO and Transmit Diversity Over-the-Air Performance
- CTIA/Wi-Fi Alliance Test Plan for RF Performance Evaluation of Wi-Fi Mobile Converged Devices
- Operator Specific Test Plans
- Engineering Evaluation
Total Radiated Power (TRP)
OTA radiated transmitter measurements are performed by measuring the device radiated power in two orthogonal polarizations at defined measurement locations surrounding the device while transmitting at maximum output power. Results are averaged by analyzing the spatially distributed data points to characterize the transmit performance of the device. TRP measurements can be evaluated for single and multiple transmitter devices.
Total Isotropic Sensitivity (TIS)
OTA receiver sensitivity measurements are performed by determining the minimum forward-link power to maintain the specified error rate (FER, BER, BLER, PER, etc., depending on the air interface) in two orthogonal polarizations at defined measurement locations surrounding the device. The device’s measured data values are spatially-averaged to determine TIS. TIS can be evaluated for single and multiple receiver devices.
Downlink Carrier Aggregation (2CA, 3CA)
Testing is performed for TRP & TIS with the device configured for downlink carrier aggregation combinations. Performance is evaluated for the Primary Component Carrier (PCC) and the Secondary Component Carrier(s) (SCC) in the appropriate antenna tuning states utilized in carrier aggregation operation for full characterization.
A-GNSS Receiver Sensitivity
TIS testing is performed to determine the wireless device’s ability to obtain GPS and GLONASS satellite vehicle signals in challenging signal conditions to determine the accuracy performance of the wireless device using network-provided assistance data. A-GNSS testing applies to both UE-based and UE-assisted A-GNSS devices.
Using a multi-probe anechoic chamber with channel emulators simulating realistic spatial propagation environments, devices with multiple antennas are tested over-the-air by evaluating the downlink signal-to-interference ratio (SIR) required to achieve various throughput metrics. Results are averaged over multiple azimuthal orientations to evaluate the device’s spatial multiplexing performance in multiple user positions.
Wi-Fi Converged Devices
RF radiated and conducted Wi-Fi performance evaluation for Wi-Fi converged devices to include client devices and access points for TRP, TIS, and Defense (Wi-Fi Radiated Receive Sensitivity with cellular radioactive and Cellular Radiated Receive Sensitivity with Wi-Fi active).