Patent Document ID: 20110243192
Application ID: 12753936
Patent Flag: 0

Claim One:
1. A method for receiving a frequency hopping signal and estimating its parameters comprising: extracting discrete-time samples from the signal; creating a state-space vector that captures relevant information to describe the dynamics of the signal; selecting a parameter to represent the probability of hopping associated with the signal; generating particle filters to estimate unknown parameters in the state-space vector based upon the discrete-time extracted signal samples by generating random particles that approximate the filtering distribution having importance weights; specifying an importance function in closed-form in a convenient mixture representation, which enables drawing particles and updating the importance weights for a new posterior density estimate; constructing an estimator to generate hop particles based upon observing at least one sample hop and then evaluating the estimator using a conditional expected value; generating particles using a spectrogram in conjunction with the importance function, and estimating the hop frequency, hop time, and amplitude parameters.