Digital front-end channelization device

摘要

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.

主权项

1. A digital front end channelization device for one or more carrier signals, the device comprising:
a per carrier section configured to process the one or more carrier signals and to output a frequency domain composite carrier signal; a composite section coupled to the per carrier section and comprising a series arrangement of frequency domain signal processing units, wherein
the series arrangement comprises a first unit, a last unit, and optionally one or more intermediate units, each unit comprisesan inverse Fourier transform unit configured to transform the frequency domain composite carrier signal into a time domain composite carrier signal,a sample detection and selection unit configured to dynamically detect and select a peak of the time domain composite carrier signal when an amplitude of the time domain composite carrier signal has exceeded a predetermined threshold,a clipping unit configured to clip the time domain composite carrier signal based on the amplitude of the selected peak so as to produce an error signal,a Fourier transform unit configured to transform the error signal into a frequency domain error signal,a frequency shaping unit configured to frequency shape the frequency domain error signal, anda summation unit configured to subtract a frequency shaped error signal from the composite carrier signal so as to produce an intermediate signal, andthe first unit and any intermediate unit further comprisesa phase selection unit configured to phase adjust the intermediate signal, andthe last unit comprises an inverse Fourier transform unit configured to produce a time domain output signal, and to upsample the intermediate signal.