  In a typical multi-standard military communication receiver, fast and
reliable spectrum sensing unit is required to extract the information of
multiple channels (frequency bands) present in a wideband input signal. In this
paper, an energy detector based on our reconfigurable filter bank, in [5], for
detecting the edge frequencies of the channels is proposed. Simulation results
are presented to show the trade-off between the time required to calculate edge
frequencies of all the channels and the maximum normalized error in estimating
the edge frequencies. The proposed method is compared with existing energy
detector methods for complexity and performance. It is shown that, for a fixed
number of input samples, error decreases with time in the proposed algorithm as
compared to other methods where error is constant. Design examples and
simulations show that the complexity of the proposed method is lower than the
other methods for a given error in estimating the edge frequencies
