Freescale Semiconductor,inc.

Nxp Usa, Inc.

Frederic Fernez

Peter Zahariev Rashev

Vincent Pierre Martinez

Roi Menahem Shor

Avraham Dov Gal

Embodiments include methods and devices for processing a digital composite signal generated at a first sampling rate. The signal includes at least first and second carrier-bands arranged to define a first inner gap between the carrier-bands. The first inner gap includes at least a first gap between the highest frequency of the first carrier-band and the lowest frequency of the second carrier-band. The digital composite signal has a predetermined instantaneous bandwidth that is lower than a sampling bandwidth. An outer gap located outside the instantaneous bandwidth and within the sampling bandwidth is determined. The first inner gap is reduced to define a second inner gap, where a width of the second inner gap is related to a width of the outer gap. The resulting folded digital composite signal is decimated to a second sampling rate lower than the first sampling rate thereby creating a decimated folded digital composite signal.

Methods and apparatus for processing digital composite signals

A digital front end channelization device for one or more carrier signals comprises a per carrier section and a composite section. The composite section may include signal processing units, each of which may include an inverse Fourier transform unit for transforming a composite carrier signal into a time domain signal, a sample detection and selection unit for detecting and selecting a peak of the time domain signal, a clipping unit for clipping the time domain composite carrier signal to produce an error signal, a Fourier transform unit, for transforming the error signal into a frequency domain error signal, a frequency shaping unit for frequency shaping the frequency domain error signal, a summation unit for subtracting the frequency shaped frequency domain error signal from the composite carrier signal, and a phase selection unit for phase adjustment of the resulting signal.

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Fontenilles, France

Frederic Fernez