If cyclic prefix insertion is used, more samples are unloaded from the core than are loaded. Therefore, the core cannot continuously stream frames, but must insert a gap of cyclic prefix length clock cycles in between each frame of input data to accommodate the additional clock cycles required to unload the cyclic prefix (see the following figure). This is indicated by the TREADY signal on the Data Input channel. This goes Low to allow the core time to unload the cyclic prefix.
Figure 1. Transform Timing for Entire Frames in Pipelined Streaming I/O with Cyclic Prefix
Insertion
