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

Abstract

Embodiments include techniques for transmitting and receiving radio frequency (RF) signals, where the techniques for generating, via a digital analog converter (DAC), a frequency signal, and filtering the frequency signal to produce a first filtered signal and a second filtered signal. The techniques also include transmitting the second filtered signal to a device under test and filtering the second filtered signal into a sub-signal having one or more components. The techniques include mixing the first filtered signal with the sub-signal to produce a first mixed signal, subsequently mixing the first mixed signal with an output signal received from the device under test to produce a second mixed signal and converting the second mixed signal for analysis.

What is claimed is: 
     
         1 . A method comprising:
 generating, via a digital analog converter (DAC), a frequency signal;   filtering the frequency signal to produce a first filtered signal and a second filtered signal;   transmitting the second filtered signal to a device; and   mixing the first signal with an output signal received from the device to produce a mixed signal.   
     
     
         2 . The method of  claim 1 , wherein the second filtered signal is filtered into a plurality of sub-signals, wherein one or more bandpass filters are used to obtain each of the plurality of sub-signals. 
     
     
         3 . The method of  claim 1 , wherein the one or more components include a center frequency component and a frequency band component, wherein the frequency band component is associated with the center frequency component. 
     
     
         4 . The method of  claim 2 , wherein each of the plurality of sub-signals is independently mixed with the first filtered signal to produce a plurality of first mixed sub-signals. 
     
     
         5 . The method of  claim 4 , wherein the plurality of first mixed sub-signals are independently mixed with the output signal received from the device under test to produce a plurality of second mixed sub-signals. 
     
     
         6 . The method of  claim 1 , wherein the first filtered signal is filtered by a low pass filter, and the second filtered signal is filtered by a high pass filter. 
     
     
         7 . The method of  claim 2 , wherein the mixing adds the first filtered signal to each of the plurality of sub-signals, wherein each of the plurality of sub-signals include one or more components, wherein the one or more components include a center frequency component and a frequency band component, and wherein the subsequent mixing subtracts the center frequency component from the output signal received from the device under test. 
     
     
         8 . The method of  claim 1 , wherein the output signal received from the device under test is filtered by one or more bandpass filters prior to performing the subsequent mixing. 
     
     
         9 . The method of  claim 1 , wherein the first filtered signal is in a Mega-Hertz frequency range and the second filtered signal is in a Giga-Hertz frequency range. 
     
     
         10 . 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 generating, via a digital analog converter (DAC), a frequency signal;   the system filtering the frequency signal to produce a first filtered signal and a second filtered signal;   the system transmits the second filtered signal to a device; and   the system mixing the first mixed signal with an output signal received from the device under test to produce a second mixed signal.   
     
     
         11 . The system of  claim 10 , wherein the second filtered signal is filtered into a plurality of sub-signals, wherein one or more bandpass filters are used to obtain each of the plurality of sub-signals. 
     
     
         12 . The system of  claim 10 , wherein the one or more components include a center frequency component and a frequency band component, wherein the frequency band component is associated with the center frequency component. 
     
     
         13 . The system of  claim 11 , wherein each of the plurality of sub-signals is independently mixed with the first filtered signal to produce a plurality of first mixed sub-signals. 
     
     
         14 . The system of  claim 13 , wherein the plurality of first mixed sub-signals are independently mixed with the output signal received from the device under test to produce a plurality of second mixed sub-signals. 
     
     
         15 . The system of  claim 10 , wherein the first filtered signal is filtered by a low pass filter, and the second filtered signal is filtered by a high pass filter. 
     
     
         16 . The system of  claim 11 , wherein the mixing adds the first filtered signal to each of the plurality of sub-signals, wherein each of the plurality of sub-signals include one or more components, wherein the one or more components include a center frequency component and a frequency band component, and wherein the subsequent mixing subtracts the center frequency component from the output signal received from the device under test. 
     
     
         17 . The system of  claim 10 , wherein the frequency signal is a complex waveform that is provided to the device under test, wherein the device under test is at least one of a phase encoded communication system, RF test equipment, cryogenic electronic device, or semiconductor device. 
     
     
         18 . 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; and   a mixer to mix the first signal with an output signal received from the device to produce a mixed signal.