Search found 7 matches

by AmatorRadioResearch
Mon Jan 16, 2017 6:07 pm
Forum: Signal Identification Help
Topic: DMR, APCO, NXDN, MOBITEX-2000,
Replies: 6
Views: 12458

Re: DMR, APCO, NXDN, MOBITEX-2000,

Sorry to add that , I have forgotten my password to AmateurRadio,
Thereby, both of amatorradioresearch and AmateurRadio usernames
are for me :D :D :D :D
by AmatorRadioResearch
Mon Jan 16, 2017 6:04 pm
Forum: Signal Identification Help
Topic: DMR, APCO, NXDN, MOBITEX-2000,
Replies: 6
Views: 12458

Re: DMR, APCO, NXDN, MOBITEX-2000,

Most of the DMR signals on sigidwiki are corrupted versions. They recorded the signal, but in the wrong way. Technically they have not maintained the Nyquist rate and so on. Many thanks to you. I found a way to record my signals. I used one the radios with DMR protocol, and recorded the signal with ...
by AmatorRadioResearch
Sun Jan 15, 2017 10:56 am
Forum: RTL-SDR Discussion
Topic: Synchronization of DMR Signal (before demodulation)
Replies: 3
Views: 4233

Re: Synchronization of DMR Signal (before demodulation)

Again I found the answer myself!
what forum is this ?
no one helps us!
any one has any inquiry regarding the synchronization of DMR
can reach me at [email protected]
by AmatorRadioResearch
Wed Dec 21, 2016 5:09 pm
Forum: RTL-SDR Discussion
Topic: Synchronization of DMR Signal (before demodulation)
Replies: 3
Views: 4233

Synchronization of DMR Signal (before demodulation)

Hi everyone I am focusing on the demodulation of c4fm modulation which is actually a Continuous Phase 4 Frequency Shift Keying (CP4FSK). The demodulation method of mine works perfectly if time synchronization is done beforehand. By the way I have no Idea how the synchronization is carried out in DMR...
by AmatorRadioResearch
Wed Aug 31, 2016 11:42 am
Forum: User Projects
Topic: Acars Decoding
Replies: 3
Views: 9848

Re: Acars Decoding

I Found the answer

I may share my experience by email request at [email protected]
by AmatorRadioResearch
Tue Aug 23, 2016 4:59 pm
Forum: User Projects
Topic: Acars Decoding
Replies: 3
Views: 9848

Re: Acars Decoding

Acars Decoding Problem


Please guys Share your experience on this problem.
by AmatorRadioResearch
Tue Aug 09, 2016 10:34 am
Forum: User Projects
Topic: Acars Decoding
Replies: 3
Views: 9848

Acars Decoding

Dear all, I am trying to extract bit stream of ACARS signals. What I have found after MSK demodulation is that the output bitstream is something like this: "1111111111111111111111000000000000011010001110100001100111111" The above bit stream is exactly the same in all ACARS signals that are demodulat...