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From: | Ron Economos |
Subject: | Re: [Discuss-gnuradio] Problems with dvbt 8k 64QAM |
Date: | Fri, 16 Mar 2018 14:22:23 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 |
It depends on how impaired your captured signal is. Here's a list. 1) Signal to noise ratio. For 64QAM, you'll need about 20 dB of S/N, preferably more. 2) DC offset. If you have a large DC offset (big spike in the
middle of the received spectrum), that can cause problems. Unlike
LTE, DVB-T uses the center carrier, and a large DC offset will
destroy that carrier. 3) Multipath. You can determine how much multipath you have from the flatness of the signal. Here's what my test setup looks like. There's a little multipath since the signal slopes up to the right. If you have large peaks and valleys, then you have significant multipath. Ron On 03/16/2018 04:26 AM, Juan Antonio
wrote:
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