1. A method of determining a maximum power reduction of a wireless terminal, the method comprising: determining whether a frequency span of the n-th order convolution of the power spectral density of the uplink signal overlaps with the spurious region; if it is determined that a frequency span of the n-th order convolution of the power spectral density of the uplink signal overlaps with the spurious region, determining a maximum power reduction using a first map; and if it is determined that a frequency span of the n-th order convolution of the power spectral density of the uplink signal does not overlap with the spurious region, determining a maximum power reduction using a second map.