Method and system for guard band detection and frequency offset detection

摘要

A signal processing circuit, which is within a satellite reception assembly, may be operable to analyze actual frequency information corresponding to a plurality of downconverted signals. Each of the downconverted signals may be downconverted using one or more corresponding local oscillators (LOs). Based on the analyzing, one or more of the following may be determined: one or more frequency offsets associated with the one or more corresponding LOs and one or more actual guard bands. The signal processing circuit may generate information on the determined frequency offsets and the determined actual guard bands. The signal processing circuit may perform, based on the generated information, one or both of a band stacking operation and a channel stacking operation so as to prevent channels/bands being stacked on each other or being overlapped. The signal processing circuit may perform, based on the generated information, frequency corrections for channel tuning in a gateway.

主权项

1. A method, comprising:
in a signal processing circuit that is within a satellite reception assembly:
analyzing actual frequency information corresponding to a plurality of downconverted signals; wherein each of the plurality of downconverted signals is downconverted using one or more corresponding local oscillators (LOs) in the signal processing circuit;determining, for each of the downconverted signals and based on the analyzing, one or more of at least the following:
one or more frequency offsets, which are associated with the one or more corresponding local oscillators (LOs), in relation to corresponding standard LO frequencies; andone or more actual guard bands between adjacent frequency bands;generating, for the plurality of downconverted signals, information on one or more of at least the following: the determined frequency offsets and the determined actual guard bands; andperforming, based on the generated information, one or both of a band stacking operation and a channel stacking operation so that:
during the band stacking operation, frequency bands are not stacked on each other or stacked frequency bands do not overlap; andduring the channel stacking operation, channels are not stacked on each other or stacked channels do not overlap during the channel stacking operation.