Method and system for steering antenna beam
First Claim
1. A hybrid wireless network system for steering antenna beams, comprising:
- an antenna array, receiving at least two RF signals;
an analog subsystem comprising;
a step leveling device coupling to the antenna array;
a magic-Tee coupler connected to the step leveling device for calculating a difference signal and a sum signal based on the two RF signals; and
a phase-sensing comparator for calculating a polarity data based on the comparison of the difference signal and the sum signal; and
a digital subsystem comprising a transceiver and a receiver, estimating a direction-of-arrival (DOA) based on the difference signal and the polarity data, and generating weights based on the DOA; and
wherein the step-leveling device receive the weights from the digital subsystem, in form of a feedback control, to apply the weights on the two RF signals respectively;
wherein the digital subsystem repetitively calculates new weights to update a beam pattern of the antenna array until the DOA approaches null.
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Abstract
A hybrid wireless network system is disclosed. The hybrid wireless network system includes an antenna array, an analog subsystem, and a digital subsystem. The antenna array at least includes two antenna elements. In the case of using multiple antenna elements to extend link range and coverage, a coarse-fine method is included for antenna elements selection. The analog subsystem calculates a difference signal and a sum signal based on the two RF signals. The analog subsystem includes step leveling devices. The digital subsystem estimates a direction-of-arrival (DOA) based on the sum signal and the difference signal. The step-leveling devices receive weights from the digital subsystem, in form of a feedback control, to apply the weights on the two RF signals respectively. The digital subsystem repetitively calculates new weights to update a beam pattern formed by the two RF signals until the DOA approaches null.
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Citations
16 Claims
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1. A hybrid wireless network system for steering antenna beams, comprising:
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an antenna array, receiving at least two RF signals;
an analog subsystem comprising;
a step leveling device coupling to the antenna array;
a magic-Tee coupler connected to the step leveling device for calculating a difference signal and a sum signal based on the two RF signals; and
a phase-sensing comparator for calculating a polarity data based on the comparison of the difference signal and the sum signal; and
a digital subsystem comprising a transceiver and a receiver, estimating a direction-of-arrival (DOA) based on the difference signal and the polarity data, and generating weights based on the DOA; and
wherein the step-leveling device receive the weights from the digital subsystem, in form of a feedback control, to apply the weights on the two RF signals respectively;
wherein the digital subsystem repetitively calculates new weights to update a beam pattern of the antenna array until the DOA approaches null. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for steering antenna beams of a network system, the method comprising:
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receiving at least two RF signals based on initial weights via an antenna array;
calculating a difference signal and a sum signal based on amplitudes of the two RF signals;
calculating a polarity data based on the difference signal and the sum signal; and
estimating direction-of-arrival (DOA) of the RF signals based on the polarity data and the difference signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification