IMPROVED PROCESSES INVOLVING NON-COHERENT INTEGRATION IN A RECEIVER

摘要

A non-coherent integration period is divided into a plurality of epochs and a frequency space is divided into a plurality of sub-spaces. A result of a first non-coherent integration in a first frequency sub-space over a first epoch is combined with a result of a second non-coherent integration in a second frequency sub-space over a second epoch. A method of non-coherent integration in an environment subject to drift of a time reference, the method comprising: creating a first putative non-coherent integration value by assuming no-drift of the time reference; creating a second putative non-coherent integration value by assuming drift of a first rate of the time reference; and determining a non-coherent integration value using the first putative non-coherent integration value and the second putative non-coherent integration value. A method comprising: storing first data associated with non-coherent integration, over only a first epoch, of a signal occupying only a first frequency space; and storing second data associated with non-coherent integration, over only a second epoch, of a signal occupying only a second frequency space, wherein the first epoch precedes the second epoch and the first frequency space is smaller than the second frequency space.