SYSTEM FOR TESTING MULTI-ANTENNA DEVICES USING BIDIRECTIONAL FADED CHANNELS
First Claim
1. A wireless test system with a test chamber in which at least one device under test is tested, comprising:
- a first plurality of test antennas;
a second plurality of test antennas;
a plurality of base stations;
downlink circuitry coupled between the first plurality of test antennas and a portion of the base stations; and
uplink circuitry coupled between the second plurality of test antennas and the portion of the base stations, wherein the uplink circuitry is configured to provide predetermined uplink path loss.
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Accused Products
Abstract
A test system for testing multiple-input and multiple-output (MIMO) systems is provided. The test system may convey radio-frequency (RF) signals bidirectionally between a device under test (DUT) and at least one base station. The DUT may be placed within a test chamber during testing. An antenna mounting structure may surround the DUT. Multiple antennas may be mounted on the antenna mounting structure to transmit and receive RF signals to and from the DUT. A first group of dual-polarized antennas may be coupled to the base station through downlink circuitry. A second group of dual-polarized antennas may be coupled to the base station through uplink circuitry. The uplink and downlink circuitry may each include a splitter/combiner, channel emulators, amplifier circuits, and switch circuitry. The channel emulators and amplifier circuits may be configured to provide desired path loss, spatial interference, and channel characteristics to model real-world wireless network transmission.
99 Citations
25 Claims
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1. A wireless test system with a test chamber in which at least one device under test is tested, comprising:
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a first plurality of test antennas; a second plurality of test antennas; a plurality of base stations; downlink circuitry coupled between the first plurality of test antennas and a portion of the base stations; and uplink circuitry coupled between the second plurality of test antennas and the portion of the base stations, wherein the uplink circuitry is configured to provide predetermined uplink path loss. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless test system with a test chamber in which a device under test is tested, comprising:
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a plurality of antennas in the test chamber; downlink circuitry coupled to a first portion of the antennas; and uplink circuitry coupled to a second portion of the antennas, wherein the uplink circuitry is configured to provide a predetermined signal to interference-plus-noise ratio. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A wireless test system for testing a plurality of devices under test, comprising:
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a test chamber in which the plurality of devices under test is tested; and a ring of test antennas within the test chamber that surrounds the device under test, wherein the test antennas in the ring comprise a first group of dual-polarized antennas configured to transmit radio-frequency signals and a second group of dual-polarized antennas configured to receive radio-frequency signals. - View Dependent Claims (22, 23, 24, 25)
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Specification