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LabVIEW Communications System Design Suite

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QPSK decoding (constant output bit stream)

I have a problem, I'm using the Tx and Rx example in Labview Communications between 2 URSPs with QPSK modulation, and applying coding (LDPC + BCH), the problem is when I demodulate the output bitstream from the QPSK demodulator is always changing (always receiving) and it changes too quickly I can't properly decode and compare to the original PN sequence sent. Is there a way to obtain a fixed output bit stream? I would really appreciate help in this matter!

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Message 1 of 5
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Hey John,

 

Thanks for the question. Would it be possible for you to give me a little more detail about the code you're using? Some screenshots might be helpful.

 

Also, can you give me a little bit more detail about exactly what you're looking for in the output?

 

Thanks!

Ty Prather
Technical Marketing Specialist
National Instruments
Message 2 of 5
(5,668 Views)

Hello!

 

Thanks for your reply, I actually have a bigger problem regarding the BER, I'll start another thread since it's not related to this one. 🙂

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Message 3 of 5
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Haha. Sounds good.

 

Thanks John!

Ty Prather
Technical Marketing Specialist
National Instruments
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Message 4 of 5
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i have the same question, would you help me?

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