DCA1000EVM: some error in IWR1642 ADC data sampled by DCA1000EVM software C

I set IWR1642 in IWR1642 like the following picture

I clicked DCA1000ARM ,Traigger Frame and PostProc ,finally I get the file named adc_data.bin.

after got adc_data,I use the function named readDCA1000 in matlab ,and set numADCSamples = 100,numADCBits = 16,numRX = 1,isReal = 0

but when I debug the function in line 15,I find that the size of adcData is 384*1 double,and there are 0 in every even line.the length of line is 384 ,It is strange,I think it should be numADCSamples*numRX *2(because of real and imaginary part into complex data)=200. if get rid of all 0 in even line ,there are 192 only.