Near-field MIMO wireless transmit power measurement test systems, structures, and processes
First Claim
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1. A process, comprising the steps of:
- positioning a multiple input-multiple output (MIMO) device with respect to at least one test antenna, wherein the MIMO device comprises a plurality of transmission (Tx) paths, wherein each of the plurality of Tx paths has a corresponding MIMO antenna associated therewith, and wherein the MIMO device is positioned such that the MIMO antennas are located proximate the at least one test antenna for near field testing;
powering the MIMO device;
providing a pulse train signal to the MIMO device, wherein the pulse train signal comprises a corresponding pulse for each of the Tx paths; and
for each of the plurality of Tx paths, sending an uplink signal associated with the corresponding pulse from the MIMO antenna that corresponds to the currently tested Tx path, receiving the uplink signal from the corresponding MIMO antenna through the at least one test antenna, measuring the power of the received uplink signal, andproviding an output based on the measured power for the currently tested Tx path.
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Abstract
Systems, processes, and structures provide near-field transmit power measurement for MIMO wireless devices (DUT), such as for any of product development, product verification, and/or production testing. A test signal, such as comprising a pulse train signal, is provided to a MIMO device under test (DUT), wherein portions of the test signal controllably steered and sequentially transmitted from each of the device antennas, to one or more test antennas that are positioned in close proximity to the MIMO DUT. The near-field power of the received test signals is measured, to quickly and efficiently determine if one or more data streams of the MIMO DUT has a problem.
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Citations
24 Claims
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1. A process, comprising the steps of:
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positioning a multiple input-multiple output (MIMO) device with respect to at least one test antenna, wherein the MIMO device comprises a plurality of transmission (Tx) paths, wherein each of the plurality of Tx paths has a corresponding MIMO antenna associated therewith, and wherein the MIMO device is positioned such that the MIMO antennas are located proximate the at least one test antenna for near field testing; powering the MIMO device; providing a pulse train signal to the MIMO device, wherein the pulse train signal comprises a corresponding pulse for each of the Tx paths; and for each of the plurality of Tx paths, sending an uplink signal associated with the corresponding pulse from the MIMO antenna that corresponds to the currently tested Tx path, receiving the uplink signal from the corresponding MIMO antenna through the at least one test antenna, measuring the power of the received uplink signal, and providing an output based on the measured power for the currently tested Tx path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18, 19, 20)
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11. A system, comprising:
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a test antenna matrix comprising at least one test antenna; a MIMO test chamber configured for receiving a MIMO device in close proximity to the test antenna matrix for near field testing, wherein the MIMO device comprises a plurality of transmission (Tx) paths, wherein each of the plurality of Tx paths has a corresponding MIMO antenna associated therewith; a mechanism for powering the MIMO device; a mechanism for providing a series of pulses to be sequentially transmitted from individual antennas of the MIMO device; a mechanism for receiving uplink signals through the test antenna matrix; and at least one processor, wherein the at least one processor is configured to measure the power of the received uplink signal, and provide an output based on the measured power for a currently tested Tx path. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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21. An apparatus, comprising:
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a test antenna matrix comprising at least one test antenna; a mechanism for receiving a MIMO device in close proximity to the at test antenna matrix for near field testing, wherein the MIMO device comprises a plurality of transmission (Tx) paths, wherein each of the plurality of Tx paths has a corresponding MIMO antenna associated therewith; a mechanism for communicating a test signal to the MIMO device; a mechanism for individually steering a portion for the test signal to an individual Tx path of the MIMO device, wherein the steered portion is separately transmitted from the individual Tx path through the corresponding MIMO antenna; a mechanism for receiving the transmitted portion of the steered test signal through the test antenna matrix; and at least one processor, wherein the at least one processor is configured to measure the power of the received transmitted portion of the steered test signal, and provide an output based on the measured power for the received transmitted portion of the steered test signal. - View Dependent Claims (22, 23, 24)
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Specification