Patent ID: 8165539

Claim:
An apparatus for reducing peak power in a transmitter for use in telecommunications systems, the apparatus comprising: a number (n) of subsequent interconnected stages, where n is greater than or equal to two and where each stage of the n stages includes: an input node that receives an input main signal, an output node that receives an output main signal, wherein the input main signal of one of the interconnected states is received from the output main signal of a previous one of the interconnected stages, an extractor that extracts peaks of the input main signal based on a predetermined clipping level, a filter that includes an amplitude response and generates a filtered peak signal, where the amplitude response on at least one reserved frequency of at least one of the n stages is smaller than the amplitude response on the at least one reserved frequency of a previous one of the n stages, and a combiner that generates the output main signal by subtracting the filtered peak signal from a delayed version of the input main signal.