Motorola Mobility LLC

Xin-Xing Yang

Xin Liang

An apparatus for generating a multicarrier communication signal having a reduced crest factor enables efficient power amplifier operation. The apparatus includes a plurality of shaping filters (-) for outputting a plurality of shaped baseband transmission signals. A plurality of mixers (-) then multiplies each signal by one of a plurality of complex carrier signals. A window function generator () generates a clipping window signal based on power levels of the unshaped baseband transmission signals. A plurality of window output units (-) outputs a plurality of subtraction-based clipping window signals. At least one summing unit () then generates the multicarrier communication signal having the reduced crest factor from the plurality of subtraction-based clipping window signals and the plurality of shaped baseband transmission signals.

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Beijing, China

Xin-Xing Yang