Patent Document ID: 9057772
Application ID: 12891609
Patent Status: 1

Claim One:
1. An apparatus for estimating the features of a radio frequency signal comprising: a processor; and memory connected to the processor, the memory embodying computer executable code configured to instruct the processor to instantiate and execute: a reference signal generator routine configured for generating a reference signal from a complex signal comprising a baseband signal having one or more observations of at least one signal of interest; one or more feature estimation routines configured to generate one or more feature estimates from the reference signal and the complex signal; a fine synchronization routine configured to generate a synchronized complex baseband signal by correlating the baseband signal and reference signal by estimating a timing, a carrier phase and a carrier frequency offset of the baseband signal and the reference signal; and a specific emitter identification module configured for identifying a specific type of emitter associated with at least one signal of interest, wherein the reference signal generator routine comprises: a scrambling code estimation routine configured to estimate a scrambling code used in the complex baseband signal; a synchronization and demodulation routine configured to demodulate the complex baseband signal using the estimated scrambling code; and a reference signal re-modulation routine configured to re-modulate the demodulated complex baseband signal using the estimated scrambling code, whereby the reference signal is created.