Patent ID: 8477248
Filing Date: 2013-07-02
Classification: H04N

Abstract:
1. A method comprising: receiving a modulated signal at an input of a demodulator; determining a first noise estimate of the modulated signal via a tunable noise mixer; generating a first output indicating a first carrier noise estimate of the modulated signal at a primary carrier frequency; generating a second output indicating a second carrier noise estimate of the modulated signal at a secondary carrier frequency; determining a first magnitude of the modulated signal at the primary carrier frequency; determining a second magnitude of the modulated signal at the secondary carrier frequency; determining the first carrier noise estimate based on the first magnitude and the first noise estimate; determining the second carrier noise estimate based on the second magnitude and the first noise estimate; and modifying an output of the modulated signal based on the first noise estimate, the first carrier noise estimate, and the second carrier noise estimate.