I took some screenshots of the data from Matlab attached. Each noise bin represents a range of frequencies which is bounded by the upper and lower frequency. These values are found in the Matlab vector UpperFrequency and LowerFrequency. This range of frequencies has an associated power found in the Power vector. Two rows for the two different polarizations x and y. Finally you can also get the phase offset of each frequency, in my example they were all zero.
To find the bandwidth, you just need to find the difference in the upper and lower frequency for that noise bin. They do not always have the same bandwidth!