LTE Device Validation – Two-Stage Method of Testing MIMO OTA

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Cost-effectively validating performance continues to be a key concern for engineers involved with LTE device development. One way to accurately predict the real-world performance of a mobile device is through the use of over-the air (OTA) testing, or in the case of LTE, Multiple-Input Multiple-Output (MIMO) OTA testing. The move to OTA testing for LTE devices with MIMO is being driven by cellular operators, who observed differences between the field performance and conducted test performance of their Single-Input Single-Output (SISO) cellular devices. This led to a desire to do more field-like test in a lab environment to ensure field performance would be satisfactory to end users. OTA test is a good fit because it evaluates handset connectivity and allows device manufacturers and operators to evaluate simulated field performance. As a result, MIMO OTA test will soon be mandatory for LTE devices as part of 3GPP conformance test requirements in order to evaluate handset radiation performance. CTIA is also working to develop its own set of requirements around MIMO OTA for LTE devices. The goal in creating these standards is to be able to distinguish a good LTE MIMO device from a bad one.

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