The Boeing Company

Hughes Electronics Corporation

Peter John Turley

Shih-Chang Wu

Victor S Reinhardt

Ronald E Sorace

A method and apparatus for switching signals through a switch matrix are disclosed. The apparatus comprises an input module and an output module. The input module has a plurality of inputs typically equal to a number of cells in a reuse pattern, and the inputs receiving at least one uplink beam. The input module also has a plurality of outputs, the plurality of outputs is typically equal to the number of subbands in the uplink beam. The output module is coupled to the input module and selectively couples the outputs from the input module to an output of the output module. The method comprises the steps of grouping the uplink signals into a plurality of groups, the number of groups typically equal to a number of cells in the cell-based transmission matrix, where each group comprises a signal from each frequency used in the frequency reuse pattern. Each group of uplink signals is then separated into subband signals, which are then grouped together into groups of similar subband signals. The groups of similar subband signals are then forwarded to demodulators for processing within the satellite system.

Switch matrix for satellite payloads with multiple uplink beams and on-board signal processing

A switch matrix is provided comprising a plurality of input modules X and a plurality of output modules P. Each input module has a plurality of first input interconnections a plurality of first interconnected switches and a plurality of first output interconnections Each output module has a plurality of second input interconnections a plurality of second interconnected switches and a plurality of second output interconnections The plurality of input modules X is electrically coupled to the plurality of output modules P, forming a plurality of signal paths having a plurality of interconnected switches K per signal path A method is also provided minimizing the total number of interconnected switches Z within the switch matrix for a particular application. The method comprises determining switch matrix design requirements, calculating the values of X and P, and performing an integer partitioning process.

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Redondo Beach, CA, United States of America

Peter John Turley