AD9371 Sample rate problem

Dear Sir:

           Now, In my projects,the communciation transmition data rate is 65.625Mbps,  I have to do rasied cosine filter with 4 times  interploation , so the data rate become 65.625 x 4 = 262.5mbps。on transimtion side , there is no problem: 


but on the receiver side, I found that the receive ADC sample rate not succeed 200Msps, our device clock is 122.88Mhz, so the max data rate is 153.6MSPS.

in receiver side ,I want to get  262.5msps data and do the 4 times decimation with match filter  in order to get the optimal sample time.  how to get 262.5msps data rate in receiver?