Patent ID: 7570711

Claim:
A quadrature linear amplification using non-linear components (LINC) transmission system to process a baseband input signal for transmission as a linearly amplified RF output signal comprising: an in-phase LINC element for processing an in-phase baseband signal into an in-phase RF signal, comprising: a constant envelope decomposition block for decomposing the in-phase baseband signal into two in-phase baseband constant envelope components; two up-converters for up-converting the two in-phase baseband constant envelope components to two in-phase RF constant envelope components; two non-linear amplifiers for amplifying the two in-phase RF constant envelope components; and a combiner for combining the two amplified in-phase RF constant envelope components to provide the in-phase RF signal; a quadrature LINC element for processing a quadrature baseband signal into a quadrature RF signal, comprising: a constant envelope decomposition block for decomposing the quadrature baseband signal into two quadrature baseband constant envelope components; two up-converters for up-converting the two quadrature baseband constant envelope components into two quadrature RF constant envelope components; two non-linear amplifiers for amplifying the two quadrature RF constant envelope components; and a combiner for combining the two amplified quadrature RF constant envelope components to provide the quadrature RF signal; and an output combiner for combining the in-phase RF signal from the in-phase LINC element with the quadrature RF signal from the quadrature LINC element to provide the linearly amplified RF output signal wherein the linearly amplified RF output signal satisfies the spectral emissions requirements of VHF Digital Link (VDL) Modes 2 and 3.