AnsweredAssumed Answered

Clock Generation for WiMAX and LTE on an FMComms1-EBZ (AD9532-1 config)

Question asked by AustinA on Oct 1, 2013
Latest reply on Nov 11, 2013 by DragosB

I'm trying to use the FMComms1-EBZ for a WiMAX\LTE OFDMA as an SDR.  However, I'm can not find a way to get the clock rates required for the ADC sampling rate.

 

The table list the fundamental sampling rates in the first column and the desired sampling rates I'm trying to generate.  The one that really matters is the 89.6 MHz as it corresponds to a 10 MHz bandwidth OFDMA WiMAX transmission.  This is the most commonly used bandwidth in the US, so it is pretty important to a proof of concept system.

Fundamental Sampling Rate
Desired Sampling Rate

4 MHz

64 MHz
5.6 MHz89.6 MHz
8 MHz64 MHz
8.96 MHz71.68 MHz
10 MHz80 MHz
11.2 MHz89.6 MHz

 

Any help would be greatly appreciated.

 

I've been looking at the datasheet for the AD9532-1 and could never find a formula for calculating the output frequency.  Is there anything to help me determine the values I need to get my desired frequency from the AD9532-1.

 

Thanks,

Austin

Outcomes