I want to send a DCM signal with USRP N210

I want to send a DCM signal with USRP N210.

DCM signal has been modulated, MATLAB N210 hardware support package can also be used.

I completed the example of QPSK with N210 sending and B210 receiving.

this is my procedure . I don't know what's wrong.

function Untitled(data)
persistent radio 
if isempty(radio)
radio= comm.SDRuTransmitter( 'Platform', 'N200/N210/USRP2','IPAddress','192.168.10.2','ChannelMapping',1,...
                'CenterFrequency',0.603e06,'LocalOscillatorOffset', 0,'Gain',0,'PPSSource', 'Internal',...
                 'ClockSource', 'Internal', 'MasterClockRate',100e6,'InterpolationFactor',512,...
                'TransportDataType', 'int16','EnableBurstMode',false );
     
    
currentTime = 0;
while currentTime < 100
          radio(data);
          currentTime=currentTime+1;
end 
release(radio);
end