System and method for aligning signals having different phases
First Claim
1. A method for aligning input signals of a composite signal where the input signals each comprise a vector having a particular phase, the method comprising the steps ofdetermining a phase rotation of a first one of said vectors such that the composite signal is determined to be at its minimum value for such phase rotation;
- rotating the phase from the determined phase rotation of said first one of said vectors a specific amount; and
repeating said determining and rotation steps for at least some of the other vectors.
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Accused Products
Abstract
A system and method for changing the phase relationship of input signals so as to generate a composite signal having the strongest possible signal. One related input vector signal is phase rotated and a phase is selected which yields the smallest value of the output composite signal. The selected phase is rotated 180 degrees. This procedure for that input signal is repeated for each input vector signal. When all inputs have thus been adjusted, the procedure can be repeated until the output composite signal is essentially free of errors.
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Citations
16 Claims
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1. A method for aligning input signals of a composite signal where the input signals each comprise a vector having a particular phase, the method comprising the steps of
determining a phase rotation of a first one of said vectors such that the composite signal is determined to be at its minimum value for such phase rotation; -
rotating the phase from the determined phase rotation of said first one of said vectors a specific amount; and
repeating said determining and rotation steps for at least some of the other vectors. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for aligning input signals of a composite signal where the input signals comprise vectors, the system comprising:
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a null detector for determining a phase rotation of each phase vector of said signal vectors, one at a time, such that the composite signal is determined to be at its minimum value for each such vector phase rotation; and
a phase reversal circuit for reversing the determined phase rotation of each of said phase vectors. - View Dependent Claims (9, 10)
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11. A system for aligning input signals of a composite signal where the input signals each comprise a vector having an adjustable phase, the system comprising
means for determining a phase rotation of each of said vectors, one at a time, such that the composite signal is determined to be at its minimum value for each such vector phase rotation; - and
means for reversing the determined phase rotation of each of said vectors.
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12. A system for providing signals to a combiner for communication of a composite signal to an antenna wherein said provided signals must have a relatively small phase differential thereinbetween and wherein said provided signals are communicated to said antenna array from a remote location over communication paths which introduce varying amounts of phase change to the respective signals, said system comprising:
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a phase adjuster for adjusting the phase of one of said provided signals such that the composite signal has a minimum value; and
a phase rotation for changing the adjusted phase, said one provided signal by 180 degrees. - View Dependent Claims (13)
a phase adjuster for adjusting the phase, in turn, of each of the other said provided signals such that the composite signal for each such adjustment has a minimum value; and
a phase rotator for changing the adjusted phase of each of said provided signals by 180 degrees.
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14. A phased array antenna system having a plurality of individual antennas arranged to simultaneously broadcast a signal such that a phase relationship of the signal as it appears at each such individual antenna determines a coverage area of the resultant signal, wherein said phased array is adapted to provide self-contained tuning of the phase of said signal as it appears at each individual antenna to maintain said phase relationship, said system comprising:
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means for communicating to each such individual antenna the signal, thereby providing a communicated signal to each such individual antenna having a desired phase;
means for monitoring a magnitude of the signal actually received at each such antenna;
means controlled by said monitoring means for adjusting the phase of a first one of said communicated signals until the magnitude is monitored as being minimum as actually received at each said antenna;
means controlled by said adjusting means for rotating said adjusted phase by 180 degrees;
means controlled by said monitoring means for adjusting the phase of other ones of said communicated signals, one at a time, until the magnitude is monitored as being minimum for each such adjustment; and
means controlled by said last-mentioned adjusting means for rotating, in turn, each of said adjusted phases by 180 degrees.
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15. A method for providing signals to a combiner for communication of a composite signal to an antenna wherein said provided signals must have a relatively small phase differential thereinbetween and wherein said provided signals are communicated to said antenna array from a remote location over communication paths which introduce varying amounts of phase change to the respective signals, said method comprising the steps of:
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adjusting the phase of one of said provided signal s such that said composite signal has a minimum value; and
changing the adjusted phase of said one provided signal by 180 degrees. - View Dependent Claims (16)
adjusting the phase, in turn, of each of the other said provided signals such that said composite signal for each such adjustment has a minimum value; and
changing the adjusted phase of each of said provided signals by 180 degrees.
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Specification