CR interference-to-noise ratio (dB) Average -40 -20 0 20 Interference at primary user (dBm) Full Projection Pre-coding 21.5 21.45 20.5 19.2 Sensing Projection Pre-coding 20 19.9 19 17.8 Partial Projection Pre-coding 21.5 21.5 20.55 19. 4

Table 3: Average throughput in different pre-coding scheme with respect to CR interference to noise ratio.