Data Frame Lengths
You can set the frame length of all SDR blocks available in the Communications Toolbox™ Support Package for USRP™ Embedded Series Radio to any integer value. This flexibility enables more straightforward multirate operation and easier modeling of standards-based packet communications.
Frame Length in Receiver Block
In the block mask of the receiver block, set Samples per frame to the desired frame length.
Frame Length in Receiver System Object
Create a receiver System object™. For example:
rx = sdrrx('E3xx');
Set the samples per frame in the System object.
rx.SamplesPerFrame = 1024;