The corner turner is a 4Kx32K matrix transpose that bridges the PFB and the FFT. By buffering each PFB frequency slice in DRAM, the transpose converts frequency-domain data back into time-domain data for use in the FFT. No data processing is done except for reordering, so it takes 36-bit data from the PFB, and feeds 36-bit data to the FFT. 32K samples of each of the PFB's 4K channels is buffered for use in the 32K FFT.