Transmit and receive radio frequency (rf) signals without the use of baseband generators and local oscillators for up conversion and down conversion

A system for transmitting and receiving radio frequency (RF) signals, the system comprising:

• a storage medium, the storage medium being coupled to a processor;
• the processor configured to:
• generate, via a digital analog converter (DAC), a frequency signal;
• filter the frequency signal to produce a first filtered signal and a second filtered signal;
• transmit the second filtered signal to a device under test;
• filter the second filtered signal into a sub-signal having one or more components;
• mix the first filtered signal with the sub-signal to produce a first mixed signal;
• subsequently mix the first mixed signal with an output signal received from the device under test to produce a second mixed signal;
• and
• convert the second mixed signal for analysis.

A computer program product for transmitting and receiving radio frequency (RF) signals, the computer program product comprising:

• a computer readable storage medium having stored thereon program instructions executable by a processor to cause the processor to:
• generate, via Field Programmable Gate Array (FPGA) digital signals which can be fed to a digital analog converter (DAC), a frequency signal;
• filter the frequency signal to produce a first filtered signal and a second filtered signal;
• transmit the second filtered signal to a device under test;
• filter the second filtered signal into a sub-signal having one or more components;
• mix the first filtered signal with the sub-signal to produce a first mixed signal;
• subsequently mix the first mixed signal with an output signal received from the device under test to produce a second mixed signal;
• and
• convert the second mixed signal for analysis.

A device for transmitting and receiving RF signals, the device comprising:

• a Field Programmable Gate Array (FPGA) that feeds digital signals to a digital analog converter (DAC), wherein the DAC generates a frequency signal;
• one or more first filters to produce a first filtered signal and a second filtered signal;
• an interface to transmit the second filtered signal to a device under test;
• one or more second filters to filter the second filtered signal into a sub-signal having one or more components;
• a first mixer configured to mix the first filtered signal with the sub-signal to produce a first mixed signal;
• a second mixer to mix the first mixed signal with an output signal received from the device under test to produce a second mixed signal;
• and
• an analog-to-digital converter (ADC) to convert the second mixed signal for analysis.

A system for transmitting and receiving radio frequency (RF) signals, the system comprising:

• a transmit path comprising:
• a Field Programmable Gate Array (FPGA) that feeds digital signals to a digital analog converter (DAC), wherein the DAC generates a frequency signal;
• one or more filters to produce a first filtered signal and a second filtered signal;
• an interface to transmit the second filtered signal to a device under test;
• one or more secondary filters to filter the second filtered signal into a sub-signal having one or more components;
• and
• a mixer configured to mix the first filtered signal with the sub-signal to produce a first mixed signal;
• a receive path comprising:
• one or more filters to filter an output signal received from the device under test;
• a second mixer configured to mix the first mixed signal with an output signal of the one or more filters to filter the output signal received from the device under test to produce a second mixed signal;
• and
• an analog-to-digital converter (ADC) to convert the second mixed signal for analysis.