Patent ID: 8817860

Claim:
An Analog to Digital Converter (ADC) based tuner comprising: a low noise amplifier that amplifies a received analog signal; an ADC that receives the received analog signal and converts the received analog signal to a received digital signal; a Phase Locked Loop (PLL) that provides a clock signal to the ADC; a channelizer that receives the received digital signal from the high-speed ADC and performs mixing and filtering operations on the received digital signals in the digital domain; a digital signal mixer that receives the received digital signal from the channelizer and mixes the received digital signals with a phase adjustment estimation signal to provide an output digital signal; a digital phase lock loop that receives the output digital signal from the digital signal mixer and provides the phase adjustment estimation signal to the digital signal mixer based upon the output digital signal; and an amplitude modulation compensator that receives the output digital signal from the digital signal mixer and modulates the amplitude of the output digital signal to compensate for amplitude modulation from phase noise, including phase noise due to the PLL, based upon the received output digital signal wherein the amplitude modulation compensator comprises: an amplifier that receives the output digital signal from the digital signal mixer and amplifies the output digital signal based upon a gain adjustment signal, a phase error detector that receives the output digital signal from the amplifier and outputs an amplitude detection error signal, and a gain adjustment loop that receives the amplitude detection error signal from the phase error detector and generates the gain adjustment signal based upon the amplitude detection error signal.