Minimizing bandwidth in down-conversion of multiple RF channels

Patent metadata

Field	Value
Publication number	US-9130645-B2
Application number	US-201314022155-A
Country	US
Kind code	B2
Filing date	Sep 9, 2013
Priority date	Sep 12, 2012
Publication date	Sep 8, 2015
Grant date	Sep 8, 2015

Abstract

A method and system is disclosed for simultaneously down-converting multiple selected signals, such as RF signals, into adjacent ranges in an intermediate frequency band so that the total resulting bandwidth, and thus the sampling rate required to digitize the signal, is minimized. A first signal is down-converted into a range starting at a lowest selected frequency in the IF band. The next signal is down-converted, into a range higher than, but near or adjacent to, the down-converted range of the first signal, and so on. A guard band may be left between the signals if desired. In this way, the selected signals occupy the minimum bandwidth required. When the selection of signals to be down-converted is changed, the frequency ranges are dynamically adjusted so that the signals being down-converted always occupy the lowest ranges of the IF band.

First claim

What is claimed is:

1. A computer implemented method of concurrently down-converting channels of information from an input signal in a first frequency band to a second frequency band, comprising:
receiving in a processor a selection of a plurality of channels in the input signal to be down-converted;
determining by the processor a plurality of frequency ranges nearby to one another and starting at a lowest frequency of the second frequency band, each frequency range having a ban…

Assignees

• Ess Technology Inc

Inventors

• Blair Robert Lynn
• Mallinson A Martin

Classifications

• H04B1/0007 Primary

  Electricity · mapped topic

• H04B1/26 Primary

  Electricity · mapped topic