Modular channelizer
AssigneeMacdonald, Dettwiler and Associates Inc.
InventorsOliver Labrèche, Michel Thériault, Pierre Talbot
Life of this patent
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Abstract
An example of a channelizer includes a plurality of receiver circuits, an individual receiver circuit including a frequency demultiplexer that is configured to demultiplex a plurality of subchannels and a time-division demultiplexer coupled to the frequency demultiplexer, the time-division demultiplexer configured to time-division demultiplex the plurality of subchannels to provide a plurality of time-division outputs, an individual time-division output including portions of data from each of the plurality of subchannels; and a plurality of switch circuits, each configured to receive a different time-division output of the plurality of time-division outputs from the individual receiver.
Claims19
An apparatus comprising:
- a switching stage for use in a channelizer, the switching stage comprising a plurality of switch circuits that are individually assigned to a plurality of sample periods such that an individual switch circuit applies a matrix operator on a plurality of time-division dempultiplexed input subchannels for an individual sample period, wherein the switching stage is configured to:
- receive the plurality of time-division demultiplexed input subchannels, input subchannels of the plurality of time-division demultiplexed input subchannels having been frequency demultiplexed from an input prior to time-division demultiplexing;
- at each respective one of the plurality of switch circuits, apply the matrix operator to received time-division demultiplexed input subchannel data for the individual sample period to obtain a plurality of switched time-division outputs for the individual sample period;
- and
- output the plurality of switch time-division outputs for the plurality of sample periods.
A system comprising:
- a gateway;
- a plurality of subscriber terminals;
- and
- a satellite configured for communication with the gateway via an uplink and configured for communication with the plurality of subscriber terminals via a downlink, the satellite including a plurality of switch circuits coupled to a plurality of receive circuits and a plurality of transmit circuits, each switch circuit configured to receive a plurality of time-division outputs that have been time-division demultiplexed according to sample period and apply a matrix operator on a different sample period.
The system of 33, wherein the plurality of receiver elements are phased array elements and wherein the satellite further comprises switching and beamforming tables configured to implement a beamforming scheme.
Dependencies are inferred from the claim text.