Before revision:  We split the entire angular or frequency band into equal-size binsand set the bin size such that the received spectra at two frequencies or angles, whose distance is equal to or larger than the size of a bin, are uncorrelated.
After revision:  We split the entire angular or frequency band into uniform bins. The bin size is set such that the received spectra at two frequencies or angles, whose distance is equal to or larger than the size of a bin, are uncorrelated.