Patent ID: 6898235
Filing Date: 2005-05-24
Classification: H04B,H04L

Abstract:
1. A system for detecting a signal, comprising: a receiver for receiving a wideband signal to be processed; a sub-band conversion module for converting the wideband signal into a plurality of sub-band signals to be processed; a channelizing module for Fast Fourier Transform channelizing said plurality of sub-band signals into a respective plurality of complex spectral components; a processing module for signal processing said plurality of complex spectral components, including a means for determining the presence of at least one signal of interest based on multiple time averaging analysis of said plurality of complex spectral components; and a high speed data router coupling each module to one another for digitally routing respective data between said modules; wherein said processing module includes a plurality of channel processors operatively connected to said data router so as to receive corresponding ones of said plurality of complex spectral components, each of said channel processors being formed so as to determine the presence of signal activity and perform demodulation of said at least one signal of interest within the corresponding complex spectral component thereof; wherein said means for determining the presence of at least one signal of interest includes, within each of said plurality of channel processors: a First-In-Tap-Out (FITO) delay memory operatively connected to receive and store said corresponding complex spectral component from said data router; a detection processor for conducting spectral filtering by convolution of said corresponding complex spectral components stored in said FITO delay memory, and for generating spectral activity parameter data on said corresponding complex spectral components based on multiple spectral magnitude running averages on said corresponding complex spectral components; at least one signal demodulation and recognition processor for filtering and demodulating said corresponding complex spectral components stored in said FITO delay memory based on the spectral activity parameter data generated by said detection processor and further refines and measures signal parameter data; and a real time controller for controlling the creation and operation of said at least one signal demodulation and recognition processor based on the spectral activity parameter data generated by said detection processor.