Re: [Discuss-gnuradio] Data loss in transmission over the air

[Harold Daniel Moreno Urbina]

Hello, 

Have you tried with just raw data?. I mean, use a file with data you already know, for example in a file, make the proper modulation, send it over the air, receive the data, put it into a file, compare both files. 

I can guess that the problem is in the decoder in the receiver part. Study about how to handle errors in digital communications. 

I found this project on the web, they explain how the receiver send packets to the transmitter to inform about the integrity of the info in the packets received.

Saludos.

2015-11-09 12:24 GMT-06:00 Israel . <address@hidden>:

Hi,

I’m working on my degree final project and I would like to implement a wireless communications system between two USRPs (N200). One of the main goals is to be able to transmit a file (image, doc, video, …) and to receive it correctly (or, at least, to receive the complete file). My question is if I can do this with GNU Radio. I have tried it for a long time (with File Source, File Sink blocks) and I always lose data in the process. I’ve read quite solutions in the mailing list about other people who had the same problem, but none have worked for me.

I attached a picture of my flowgraph. It is made in a virtualization environment, however, when I work in the real environment (using the USPRs), I keep losing data.

On the other hand, if there is another way to transmit and to receive a file (for example, without using File Source and File Sink), I would also like to know.

I really appreciate any help

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