Advertisment: Broadband via satellite
Advertisment: Planet Earth rotating animation

Satellite Internet Forum.

Welcome, Guest.        Forum rules.
      Home            Login            Register          
Pages: 1

Nyquist filter bandwidth

(Read 3032 times)

Posts: 9
Jan 10th, 2011 at 8:07am  
I have a data rate of 2.048 Mbps data rate. I need to modulate at 70 MHz by using QPSK modulation.
I selected a filter bandwidth of 1.3312 MHz which is 1.3 times of symbol rate. My question is incase if i have a nyquist bandwidth filter(datarate/2=1.024MHz) is available at 70 MHz can i use that kind of filter ? In this case 1 time of the symbol rate. Please clarify.
Back to top
IP Logged
Eric Johnston
Senior Member

Posts: 2109
Reply #1 - Jan 10th, 2011 at 4:09pm  
An important consideration for you should be the specification that you are trying to meet in terms of the spectrum of your transmiied signal to avoid unacceptable interference to adjacent carriers.

These links may help you:

If your information rate is 2048 kbit/s don't forget to add the FEC overhead, if applicable, to get the higher transmission rate.

Best regards, Eric.
Back to top
IP Logged
Pages: 1