1. A method for estimating multi-resolution based power spectral density (PSD), the method comprising: receiving, from a communication device, a set of wireless signals from a plurality of wireless devices; sampling, at a base station control module, the received set of wireless signals; computing, at the base station controller, a first PSD of a signal from the sampled set of wireless signals to determine a first resolution and a first error variance (EV) value associated with the first PSD; computing, at the base station controller, a second PSD of the signal to determine a second resolution and a second EV value associated with the second PSD; determining, at the base station controller, missing frequency variables of the second PSD using the first resolution and the second EV through an expectation maximization technique; and facilitating, at the base station controller, wireless communications between the plurality of wireless devices based on the determined missing frequency variables.