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From: | samuel verdon |
Subject: | [Discuss-gnuradio] QPSK Synchro |
Date: | Wed, 6 Jun 2018 16:53:27 +0200 |
Hello, I am blocked with a QPSK problem that I would like to share, and maybe you will find my mistake. I have build a QPSK transciever based the gnuradio tutorial for a project. The Tx part is not done by myself modulation is already made, I just have to emit the signal. Here is the spec : Bitrate : 2Mbps Sym rate : 1 Mbps Symbol Oversampling ratio: 9 Hardware: USRP b200mini The data send are two symbol, exactly 0x22 or 00 10 00 10 repeatly The reception use a LimeSDR. This part receive de signal but I can clearly see the the lock on is not working. I post some image of my flograph: Flowgraph: https://ibb.co/fJQxSo Data sent: https://ibb.co/mLJvDT Data received: https://ibb.co/dLNcSo My questions are:
Thanks in advance and it needs more explaination, let me know I will post it. Cheers
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