Noise figure of DW3000


I plan to put a LNA to our DW3000 receiver to improve the sensitivity. To estimate the improvement on sensitivity, I need to have the noise figure of DW3000. However, the NF is not mentioned in the datasheet. I have only found the NF of DW1000 is 5dB in an application note.

Could anyone please share the NF of DW3000? I found the sensitivity of DW3000 is similar to DW1000. Is it ok to assume the NF of DW3000 is around 5dB?