Test system and method for determining a response of a transmission channel
AssigneeRohde & Schwarz GmbH & Co. KG
InventorMichael Feilen
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Abstract
A test system for determining a response function of a transmission channel is disclosed. The transmission channel comprises an input, a mixer, a device under test and a coupling unit. The test system comprises a local oscillator, a delay unit, a combiner and an analysis module. The analysis module is configured to determine the response function of the transmission channel based on a superposed signal, wherein the superposed signal comprises an output signal of a device under test and a delayed oscillator signal. Further, a method for determining a response function of a transmission channel is disclosed.
Claims18
A test system for determining a response function of a transmission channel, the test system comprising:
- a transmission channel comprising an input, a mixer, a device under test and a coupling unit;
- a local oscillator;
- a delay unit;
- a combiner;
- and
- an analysis module,
- said local oscillator being configured to generate an oscillator signal having a predetermined frequency, said local oscillator further being configured to forward the oscillator signal to the mixer and to the delay unit,
- said mixer being configured to mix said oscillator signal with an input signal received via said input, thereby generating an intermediate frequency signal,
- said device under test being configured to process the intermediate frequency signal, thereby generating an output signal,
- said coupling unit being configured to forward at least a portion of said output signal to the combiner,
- said delay unit being configured to forward the oscillator signal to the combiner with a predetermined time delay, thereby generating a delayed oscillator signal,
- said combiner being configured to combine the delayed oscillator signal and said portion of the output signal, thereby generating a superposed signal, and
- said analysis module being configured to determine the response function of the transmission channel based on the superposed signal.
A method for determining a response function of a transmission channel comprising a device under test, comprising the following steps:
- receiving an input signal;
- generating an oscillator signal having a predetermined frequency;
- mixing said oscillator signal with said input signal, thereby generating an intermediate frequency signal;
- processing said intermediate frequency signal via a device under test, thereby generating an output signal;
- delaying said oscillator signal by a predetermined time delay via a delay unit, thereby generating a delayed oscillator signal;
- superposing at least a portion of said output signal with said delayed oscillator signal, thereby generating a superposed signal;
- and
- determining the response function of the transmission channel based on the superposed signal.
Dependencies are inferred from the claim text.