Point to point communication system with parallel links
AssigneeMicrowave Networks Incorporated
InventorsShmuel Levy, Noam Livneh, Ori Stern, Ami Saguy
Life of this patent
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Abstract
Methods and systems for increasing the potential capacity of point to point communication between two sites within line of sight of each other are disclosed. Two antennas at each of the two sites are configured geometrically to approximately provide a desired value for a function of signal electrical phase differences so as to allow differentiation of transmitted signal. Capacity is thereby increased compared to a system with one antenna at each site.
Claims39
A method for performing beam forming on signals which include symbols encoded by quadrature amplitude modulation, comprising:
- providing a first statistical value derived from a constellation which includes all possible symbols;
- providing at least two other statistical values derived from at least two subsets of said constellation;
- for a first plurality of iterations, updating filter coefficients using said first statistical value;
- and
- for a second plurality of iterations, following said first plurality of iterations, updating said filter coefficients using said at least two other statistical values, wherein said updating using said at least two other statistical values includes for each iteration, deciding which of said at least two other statistical values to use.
A beam forming system for performing beam forming on signals which include symbols encoded by quadrature amplitude modulation, comprising:
- a first statistical unit for providing a first statistical value derived from a constellation which includes all possible symbols;
- at least two other statistical units for providing at least two other statistical values derived from at least two subsets of said constellation;
- a first plurality of iterators for providing a first plurality of iterations, updating filter coefficients using said first statistical value;
- and
- a second plurality of iterators connected to said first plurality of iterators for providing a second plurality of iterations following said first plurality of iterations, updating said filter coefficients using said at least two other statistical values, wherein said updating using said at least two other statistical values includes for each iteration deciding which of said at least two other statistical values to use.
A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform beam forming on signals which include symbols encoded by quadrature amplitude modulation, comprising:
- providing a first statistical value derived from a constellation which includes all possible symbols;
- providing at least two other statistical values derived from at least two subsets of said constellation;
- for a first plurality of iterations, updating filter coefficients using said first statistical value;
- and
- for a second plurality of iterations following said first plurality of iterations, updating said filter coefficients using said at least two other statistical values, wherein said updating using said at least two other statistical values includes for each iteration deciding which of said at least two other statistical values to use.
A computer program product comprising a computer useable medium having computer readable program code embodied therein for performing beam forming on signals which include symbols encoded by quadrature amplitude modulation, the computer program product comprising:
- computer readable program code for causing the computer to provide a first statistical value derived from a constellation which includes all possible symbols;
- computer readable program code for causing the computer to provide at least two other statistical values derived from at least two subsets of said constellation;
- computer readable program code for causing the computer for a first plurality of iterations, to update filter coefficients using said first statistical value;
- and
- computer readable program code for causing the computer, for a second plurality of iterations following said first plurality of iterations, to update said filter coefficients using said at least two other statistical values, wherein said updating using said at least two other statistical values includes for each iteration deciding which of said at least two other statistical values to use.
Dependencies are inferred from the claim text.