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HW/SW Codesign QPSK Transmitter and and Receiver Example runing problems

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yang li
yang li on 9 May 2019
Answered: Neil MacEwen on 2 Sep 2019
HW/SW Codesign QPSK Transmitter and and Receiver Example runing problems
Im using matlab 2017b I have finish the hw sw co dedign demo successfully However, i find that this demo require transmitter keep working during the entire experiment, that is, continuous transmitting. if i stop the transmitter (for example,disable the adi rf som transmitter block for a period of time),the RECIEVER will NOT accept any data even after tx start working again, how can i deal with this problem ps hardware is picozed sdr vivado is 2016.4

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Accepted Answer

Neil MacEwen
Neil MacEwen on 9 May 2019
Hi Yang,
This example has been designed as a streaming system, and the receiver has not been designed to cope with interruptions to the data stream. I'm afraid if you would like to make this suitable for a bursty system, you will need to investigate changes to the receiver yourself.
Regards,
Neil

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yang li
yang li on 11 May 2019
thank you for telling me this.
Would you please tell me if this problem is solved in matlab2018b or 2019a (bursty system can be accepted)
if not, would you please tell me how to modify the demo for bursty transmittion and reception
Regards
Neil MacEwen
Neil MacEwen on 13 May 2019
Hi Yang,
I'm afraid the example is the same in R2018b and R2019a. To modify this to a burst-capable example you will need to investigate the changes yourself.
We'll note your requirement and think about future changes.
Kind regards,
Neil
yang li
yang li on 28 Aug 2019
thank you for your answer
ln addition, i find that in demo hw sw co design implementation of ads_b(similiar with qpsk demo), the system runs well at 1090mhz and real plane signals are recieved. that is, the model works well in burst mode (because real plane broadcast ads_b signals in bursty mode)
my question is why this model can run on bursty mode while the qpsk demo can not.
regards

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More Answers (1)

Neil MacEwen
Neil MacEwen on 2 Sep 2019
Hi Yang,
The ADS-B model has been designed to work with bursty signals. The QPSK model has been designed to work with streaming signals. To modify this to a burst-capable example you will need to investigate the changes yourself.
Thanks,
Neil

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