topic Re: QPSK decoding (constant output bit stream) in LabVIEW Communications System Design Suite

QPSK decoding (constant output bit stream)

johnmarry — Tue, 08 Dec 2015 15:56:38 GMT

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!

Re: QPSK decoding (constant output bit stream)

TYtanic — Wed, 09 Dec 2015 21:45:28 GMT

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!

Re: QPSK decoding (constant output bit stream)

johnmarry — Thu, 10 Dec 2015 15:28:06 GMT

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. 🙂

Re: QPSK decoding (constant output bit stream)

TYtanic — Fri, 11 Dec 2015 15:44:28 GMT

Haha. Sounds good.

Thanks John!

Re: QPSK decoding (constant output bit stream)

happyxin92 — Fri, 27 May 2016 10:57:15 GMT

i have the same question, would you help me?