Radio frequency digital receiver system and method

摘要

A radio frequency digital receiver system and method is described in which the radio frequency digital receiver system uses a discrete Fourier transform where detection decisions are made based on a spectral estimate. The spectral estimate is formed from an output of the, in which the spectral estimate is improved by enabling spatially variant apodization (SVA) such that the detection ability of the RF digital receiver is improved. In a further embodiment, the SVA is optimized for use with Digital Signal Processing.

主权项

1. A radio frequency (RF) digital receiver system for detecting RF signals, comprising: an RF digital receiver including:
discrete Fourier transform (DFT) for making detection decisions on an RF signal received by an antenna based on a spectral estimate formed from an output of the DFT means; and the RF digital receiver being configured to: enable spatially variant apodization (SVA) to form the spectral estimate by selecting a function for producing a spectral estimate which is representative of the RF signal received by the antenna, and enhance a detection ability of the RF digital receiver, wherein the spectral estimate for digital signal processing is formed by: calculating parameters at each frequency bin; and applying the calculated parameters to each frequency bin according to a set of equations and determining whether further processing of a respective frequency bin is necessary based on a dividend of at least one equation in the set of equations.