Bit error rate of a channel

[bns2804]

Hello.

My question is I have a channel and I want to measure the data transmission performance for data rate upto 100Mbps. How do I send a signal via the channel amd retrieve back at the end of the channel and calculate Bit Error Rate. I wanted to do it using NI mydaq..

Please Help..

[Dennis_Knutson]

First, you'll need hardware that can generate that high of a rate. As you can see from the specs, the MyDAQ cannot come close. For reference, see:

http://www.ni.com/white-paper/7964/en/

http://www.ni.com/white-paper/7938/en/

[bns2804]

Thank you..But is there a way of calculating BER for low data rate such as in Kbps using the mydaq??

[Dennis_Knutson]

Not if you want to generate/read a signal with the digital I/O. You might be able to achieve 1Kbps but since the digital is software timed, you'll have quite a bit of jitter. What sort of channel are you trying to test?

[bns2804]

I have designed a coupling circuit to be tested over power line.. I want to calculate the BER of the data transmission between transmitting coupling circuit and receiving coupling circuit placed at different nodes in a building.

[Dennis_Knutson]

And what sort of physical signal do you wish to send? As I said, using the digital lines would probably not work.

[bns2804]

For a first time, i would prefer to send baseband signals as a sequence of pulses: 101010111 etc and check for BER..Later I am planning to use modulation and line coding and transmit the same data.