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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] Pay You $$$ to Mentor Me - Tx OFDM 64 QAM and Rx Measure Error Vector Magnitude |
Date: | Sun, 24 Sep 2017 13:54:55 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 |
HI IFly88, I don't fully understand your requirements – on one hand, you
just say "I just want OFDM with 15 kHz subcarrier spacing and
QAM/QPSK inside", on the other hand you mention LTE: an arbitrary
OFDM signal with the right subcarrier spacing and constellation
mapping does not constitute a validly measurable LTE signal. Your
LTE receiver needs a lot of specific structure in the frames to be
able to synchronize, and equalize, to an LTE transmission. So, what exactly are you using to measure EVM? What is the higher
level goal of this? Your transmit hardware will always also play a
part in the signal quality you receive, so it's usually better to
first sit down and contemplate what you want to measure, then
design a system. Best regards, On 09/23/2017 10:30 PM, Ifly88 wrote:
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