Method and apparatus for data communication
AssigneeHer Majesty the Queen in right of Canada, as represented by the Minister of Industry through the Communications Research Centre
InventorJohn T. Sydor
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Abstract
The Highly Structured Rosette Antenna Array Data Communications System is a high capacity wireless network in which data is communicated from and to remotely located subscribers. The system uses cells that are comprised of a multiplicity of oblong microcells arranged in a circle, giving the cell a rosette-like pattern like frequency channels are assigned to every N′″ microcell, where N is the number of distinctly different frequency channels. The sum of the distinctly different channels is the total bandwidth assigned to the rosette. Typically, if M is equal to the total number of microcells in the rosette, then M/N is equal to the number of like-frequency microcells in the rosette.
Claims24
A wireless communication hub comprising:
- a plurality of radiators each associated with an oblong microcell and for radiating a narrow beam outward from the hub within the oblong microcell, different radiators for radiating within different oblong microcells, radiators associated with adjacent oblong microcells for radiating within different frequency ranges such that adjacent oblong microcells are frequency isolated and at least two spatially isolated oblong microcells within a same half of a rosette are associated with radiators for radiating within a same frequency range and are for radiating beams having sufficiently low side lobe levels for providing the spatial isolation;
- a plurality of modulators each for modulating a signal based on data received and for providing the modulated signal to a radiator from the plurality of radiators;
- and
- a processor for providing the data to the modulator.
A communication architecture comprising:
- a plurality of similar overlapping rosettes each rosette defined by radiation from an antenna hub comprising at least 16 directional radiators for radiating power at frequencies associated with a microcell forming a portion less than the whole of the rosette, the rosette comprising:
- a number of microcells greater than 15, adjacent microcells within a same rosette associated with different radiated frequencies, some microcells within the rosette associated with same frequencies and spatially isolated from microcells associated with a same frequency, wherein the at least 16 radiators are for radiating signals having sufficiently low sidelobes to provide said spatial isolation, radiators associated with adjacent microcells for radiating at different frequencies such that the adjacent microcells are frequency isolated;
- and,
- means for changing the orientation of the microcells within the rosette for limiting inter-rosette interference.
A method of arranging a plurality of overlapping rosettes, each rosette defined by radiation from an antenna hub comprising a plurality of directional radiators for radiating power at frequencies associated with a microcell forming a portion of the rosette less than the whole, the rosette comprising:
- a number of microcells, adjacent microcells within a same rosette associated with different radiated frequencies, some microcells within the rosette associated with same frequencies;
- the method comprising the step of:
- (a) orienting microcells of adjacent rosettes such that all microcells of different adjacent rosettes and associated with a same frequency are offset by an angle other than a multiple of 180 degrees relative one to another.
Dependencies are inferred from the claim text.