Satellite signal propagation delay test device
AssigneeViavi Solutions Inc.
InventorsJoseph GOMEZ, David ROYLE
Life of this patent
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Abstract
A test device determines a Global Navigation Satellite System (GNSS) signal propagation delay in a GNSS signal distribution system (GSDS) for a radio access network. The test device includes a GNSS receiver. The GNSS receiver is connected at different times to a reference GSDS with a known signal propagation delay and to a device under test (DUT), including a second GSDS having an unknown signal propagation delay. One pulse per second (1PPS) signals are generated by the GNSS receiver and are compared to determine the unknown
Claims20
A test device for determining Global Navigation Satellite System (GNSS) signal propagation delay in a GNSS signal distribution system (GSDS) for a radio access network, comprising:
- a GNSS receiver to:
- receive a first GNSS signal when connected to a reference GSDS, wherein the reference GSDS has a known signal propagation delay;
- generate a first one pulse per second (1PPS) signal from the first GNSS signal received from the reference GSDS;
- receive a second GNSS signal when connected to a device under test (DUT), including a second GSDS having an unknown signal propagation delay, instead of the reference GSDS;
- and
- generate a second 1PPS signal from the second GNSS signal received from the DUT;
- a processor to:
- compare the first 1PPS signal to the second 1PPS signal;
- and
- determine the unknown signal propagation delay of the DUT based on the comparison of the first 1PPS signal to the second 1PPS signal.
A method of determining Global Navigation Satellite System (GNSS) signal propagation delay in a GNSS signal distribution system (GSDS) for a radio access network, the method comprising:
- receiving, by a test device, a first GNSS signal from a first GSDS, wherein the first GSDS comprises one of a DUT with unknown propagation delay or a reference GSDS having a known propagation delay;
- generating a first one pulse per second (1PPS) signal from the first GNSS signal;
- receiving, by the test device, a second GNSS signal from a second GSDS, wherein the second GNSS comprises another one of the DUT with unknown propagation delay or the reference GSDS having a known propagation delay;
- generating a second 1PPS signal from the second GNSS signal;
- comparing the first 1PPS signal to the second 1PPS signal;
- and
- determining the unknown propagation delay of the DUT based on the comparison of the first 1PPS signal to the second 1PPS signal.
A portable field test device for determining Global Navigation Satellite System (GNSS) signal propagation delay in a GNSS signal distribution system (GSDS) for a radio access network, comprising:
- a battery module to supply power to the portable field test device;
- one or more memories;
- a processor;
- and
- a GNSS receiver to:
- receive a first GNSS signal when connected to a reference GSDS, wherein the reference GSDS has a known signal propagation delay;
- generate a first one pulse per second (1PPS) signal from the first GNSS signal received from the reference GSDS;
- receive a second GNSS signal when connected to a device under test (DUT), including a second GSDS having an unknown signal propagation delay, instead of the reference GSDS;
- and
- generate a second 1PPS signal from the second GNSS signal received from the DUT,
- wherein the processor is to:
- compare the first 1PPS signal to the second 1PPS signal;
- and
- determine the unknown signal propagation delay of the DUT based on the comparison of the first 1PPS signal to the second 1PPS signal.
Dependencies are inferred from the claim text.