Multichannel radio receiver with overlapping channel filters

摘要

A radio may define a channel plan to include one or more channels, and each channel may include a plurality of overlapping filters. Each filter may overlap at least one other filter, such as by an expected bandwidth of an incoming signal. The overlapping filters may extend over a frequency range based in part on an expected frequency error of the incoming signal. Due in part to the overlapping nature of the filters, the incoming signal will be within at least one of the filters. Since only one of the filters must receive the incoming signal, the filters may be narrower than might otherwise be the case, particularly in an application that includes frequency error. Accordingly, the filters may be narrower than their respective channels, and therefore receive less noise and interference. This improves signal-to-noise and improves the quality of the link and range.

主权项

1. A radio receiver, comprising:
a radio frequency (RF) subsystem; a digital subsystem to receive input from the RF subsystem; a channel plan defined by the digital subsystem to include at least one channel, each of the at least one channel comprising a plurality of overlapping filters, wherein the plurality of overlapping filters is distributed to span a frequency spectrum based at least in part on frequency misalignments of incoming signals; and a correlator to receive and interpret data from each of the plurality of overlapping filters and to recognize a preamble of a packet at a frequency associated with a filter from among the plurality of overlapping filters.