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when i want to receive dvb-t signal in rx-dvbt Error :resart aquisition

Open stackprogramer opened this issue 9 years ago • 10 comments

hi, when i used grc dvb-t receiver with rtl-sdr and hackrf one:

resart aquisition od_freq_offset:-7 how can i solved my problem??????

stackprogramer avatar Feb 14 '17 08:02 stackprogramer

Hi,stackprogramer Did you solve your problem? I have the same question. Could you tell me how did you solve problems? I'm looking forward to your reply! liuhaiping

liuhp avatar Jul 18 '17 02:07 liuhp

@liuhp Hi we worked on solving this problem hackrf one but we couldn't solve it yet..... but we can TX/RX with USRP................. so we concluded that hackrf one is weak in receiving.........we examine more and we think 8bit ADC HackRF One causes random errors....... for more info please see my post blog.

http://blog.stackprogramer.xyz/en/2017/07/06/observing-random-jitter-in-hackrf-one-in-high-bandwidth-with-high-carrier-modulation/

best regards stackprogramer

stackprogramer avatar Jul 18 '17 03:07 stackprogramer

@stackprogramer Hi, Thanks for your reply! I read your blog carefully, it's help me a lot. And I want to know whether you can search TV channel to watch. I cann't receive anything. best regards liuhaiping

liuhp avatar Jul 18 '17 06:07 liuhp

@liuhp we can receive DVB-T signal with hardware based local station(Program TV our country) like RTL-SDR or setup Box DVB-T. but we even can send DVB-T with hackrf one and receive with a hardware DVB-T player like RTl-SDR...... in receive with gnuradio we had error offset frequency error........

stackprogramer avatar Jul 18 '17 07:07 stackprogramer

@stackprogramer
Hi, I used USRP B200 to receive DVB-T signal and I am from China .Do you think the problem is antenna or distance ? Did you change other parameters except center frequency? Could I know where you come from?

liuhp avatar Jul 18 '17 08:07 liuhp

@liuhp hi i think china has not local TV DVB-T station. please see countries that has DVB-T https://en.wikipedia.org/wiki/DVB-T#Countries_and_territories_using_DVB-T

So you should with another USRP transmit DVB-T and try it receive, only use osmocom source and center frequency and sps.

stackprogramer avatar Jul 18 '17 10:07 stackprogramer

@stackprogramer Hi, I have already completed transmit and receive with .ts file. I used USRP to receive DVB-T signal of European countries ,but I received nothing. I don't know why.What should I do?

liuhp avatar Jul 18 '17 12:07 liuhp

please first test with a hardware DVB-T player like RTL-SDR is a dongle dvb-t, and after you sure that signal DVB-T is on air, you should detect what's version DVB-T is on air..... DVB-T or DVB-T2 or DVB-T 2000 carriers or DVB-T8000 carriers......

I had a question how you can recevie DVB-T signal Europe from china???????? If you are in Europe ok, if you are in china..........???? china doesn't has any DVB-T signal. I guess Channel satellite Europe you mean.. these channel has DVB-S protocol......you should installed gnuradio DVB-S module.

stackprogramer avatar Jul 18 '17 13:07 stackprogramer

@stackprogramer That you mean if I am in China I cann't receive Europe signal? But I receive European channels with USB Dongle whitout Gnuradio ,only in the gnuradio cann't receive channel, so I want to try to receive European in gnuradio. No matter it can achieve ,I want to try it.

liuhp avatar Jul 19 '17 00:07 liuhp

It works perfectly for me with Federico Larroca's symbol acquisition block

Three important details can be the gain of the amplifier, the offset and the bits of the SDR, 12 better than 8

xugmu avatar Oct 26 '21 22:10 xugmu