Dear all,
I am currently doing an experiment with UWB signals at RF freq, and I use an DSO81304A Infiniium Oscilloscope to capture the waveform into a .csv format.
After some processing to obtain the entire burst, the file is converted into a .tim to be read in using a TimedDataRead module.
I have a few questions:
- I understand that Ptolemy works on baseband signals. Is there a need to do any downconversion?
- Alternatively, should I do a demodulation to obtain the I and Q components, before applying the signals to the EVM block to measure the performance?
- I understand that the UWB signal is a complex signal with Real and Imaginary components, as evident if the UWB source is written to a .ascsig output file. If I capture the waveform using the oscilloscope, would I only capture the Real components and in the process, lose the Imaginary components?
Thanks
KH
I am currently doing an experiment with UWB signals at RF freq, and I use an DSO81304A Infiniium Oscilloscope to capture the waveform into a .csv format.
After some processing to obtain the entire burst, the file is converted into a .tim to be read in using a TimedDataRead module.
I have a few questions:
- I understand that Ptolemy works on baseband signals. Is there a need to do any downconversion?
- Alternatively, should I do a demodulation to obtain the I and Q components, before applying the signals to the EVM block to measure the performance?
- I understand that the UWB signal is a complex signal with Real and Imaginary components, as evident if the UWB source is written to a .ascsig output file. If I capture the waveform using the oscilloscope, would I only capture the Real components and in the process, lose the Imaginary components?
Thanks
KH
No, UWB receiver has downconversion component.
should I do a demodulation to obtain the I and Q components, before applying the signals to the EVM block to measure the performance?
No. It si not necessary.
- I understand that the UWB signal is a complex signal with Real and Imaginary components, as evident if the UWB source is written to a .ascsig output file. If I capture the waveform using the oscilloscope, would I only capture the Real components and in the process, lose the Imaginary components?
No. You should record both I and Q signal.