The antenna is one of the most important components of mobile stations, since antenna design has a significant effect on mobile station performance and the end user's experience. The industry therefore needs effective test methods to evaluate the mobile station's overall radiated end-to-end performance. Traditional receiver testing used cabled signals which bypass the antennas, but over the air (OTA) testing evaluates the device's overall radiated performance, including the impact of the antennas. Conformance tests for single antenna devices have been in existence since 2001. These tests measure the total radiated sensitivity (TRS) of the receiver and the total radiated power (TRP) of the transmitter. TRS is also known as total isotropic sensitivity (TIS).
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