Multi-component power spectra estimation method for multi-detector observations of the cosmic microwave background

We present a new method for multi-component power spectra estimation in multi-frequency observations of the CMB. Our method is based on matching the cross- and auto-power spectra of observation maps to their expected values. All the component power spectra are estimated, as well as their mixing matrix. Noise power spectra are also estimated. The method has been applied to full-sky Planck simulations containing five components and white noise. The beam smoothing effect is taken into account. [Copyright &y& Elsevier]