[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] Video Streaming Issue (most probably at receiving

From: Syed Aqeel Raza
Subject: Re: [Discuss-gnuradio] Video Streaming Issue (most probably at receiving end)
Date: Tue, 4 Feb 2014 15:15:33 +0800

Hi Ron,

Thanks for your suggestion. It works for me :)

Syed Aqeel Raza

On Mon, Feb 3, 2014 at 11:54 PM, Syed Aqeel Raza <address@hidden> wrote:

Again, I did some more work and the details are as under.

1. I have created a single flowgraph without USRP hardware. For your reference the file is enclosed with the name of gmsk_file_transceiver.grc. This work fine and we can see the stream video output without any difficulty.

2. To continue further I splitted the above mentioned file into transmitter and receiver side along with the inclusion of USRP source and sink blocks, respectively. Their flowgraphs are enclosed with the name of gmsk_tx.grc and gmsk_rx.grc, respectively. The FFT plot shows that (vdo transmission.png enclosed) transmitter and receiver handshakes with each other but the signal difference between the transmitter and the receiver side is 80 dB. I further noticed that whenever I stopped the transmission the received signal at the receiver further drops to -120 dB.

I really get stuck in this issue for the last two days. I need your assistant to resolve this problem as I am a newbie in gnuradio using USRP platform.

Thanks in advance.

Syed Aqeel Raza 


On Sat, Feb 1, 2014 at 11:36 AM, Syed Aqeel Raza <address@hidden> wrote:
Hi Martin,

Thanks for your reply. 

I have made some changes in the flowgraphs due to which the transmitter and receiver sides handshakes with each other. Despite of this handshaking, the receiver side is not produced the required baseband signal. Furthermore, I have designed a single flowgraph that comprises on transmitter and receiver without the inclusion of USRP source and sink block. That single flowgraph works fine and perfectly streaming the video. 

I will send the updated flowgraphs to you by tomorrow.

Syed Aqeel Raza

On Sat, Feb 1, 2014 at 8:05 PM, Martin Braun <address@hidden> wrote:
On 30.01.2014 18:17, Syed Aqeel Raza wrote:
I have checked the transmission part, which is working perfectly by

transmitting a video stream over the wireless. Whereas, no video

reception is displayed on receiver end.

How did you test the transmitter?

For further reference, I have attached the flow charts used for

transmission and reception of video streaming. An earliest reply is

highly appreciated.

There's many things that can go wrong here. Does your rx spectrum look good?


reply via email to

[Prev in Thread] Current Thread [Next in Thread]