Wireless network apparatus and adaptive digital beamforming method thereof
First Claim
1. A wireless network apparatus, comprising:
- an antenna array, having a plurality of antennae;
a transceiver for receiving a plurality of analog input signals from a client via the antennae;
a D/A converter for converting the analog input signals into digital input signals;
a weighting device for receiving and multiplying the digital input signals by a weight vector to output an digital weighted signal, comprising;
a weight generator, for generating the weight vector, which includes a plurality of weights corresponding to the digital input signals from the antenna array, wherein the weight generator further comprises;
a searching unit for determining a main central angle in response to the digital input signals;
a radio pattern unit for determining the weight vector in response to the main central angle by looking up a predetermined table; and
a track unit for fine-tuning the main central angle;
p and an algorithmic unit, multiplying the digital input signals by the weight vector to generate a digital weighted signal; and
a MAC device connected to the weighting device for processing the digital weighted signal.
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Abstract
A wireless network apparatus, comprising a weighting device. The weighting device, includes a weight generator, and an algorithmic unit, and is for receiving and multiplying digital input signals from an antenna by a weight vector to output a digital weighted signal. The invention searches for the location of the client by detecting its signal strength and moving the main beam generated by the antenna array towards the client using an adaptive digital beamforming method according to proposed algorithms. The method searches for a client by: first, searching a main central angle C; then, determining a weight vector in response to the main central angle C; fine-tuning the main central angle C; and forming a main beam according to the fine-tuned main central angle and the weight vector.
6 Citations
17 Claims
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1. A wireless network apparatus, comprising:
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an antenna array, having a plurality of antennae;
a transceiver for receiving a plurality of analog input signals from a client via the antennae;
a D/A converter for converting the analog input signals into digital input signals;
a weighting device for receiving and multiplying the digital input signals by a weight vector to output an digital weighted signal, comprising;
a weight generator, for generating the weight vector, which includes a plurality of weights corresponding to the digital input signals from the antenna array, wherein the weight generator further comprises;
a searching unit for determining a main central angle in response to the digital input signals;
a radio pattern unit for determining the weight vector in response to the main central angle by looking up a predetermined table; and
a track unit for fine-tuning the main central angle;
p andan algorithmic unit, multiplying the digital input signals by the weight vector to generate a digital weighted signal; and
a MAC device connected to the weighting device for processing the digital weighted signal. - View Dependent Claims (3, 5)
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2. (canceled)
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4. (canceled)
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6. An adaptive digital beamforming method, for adjusting an antenna array, the method comprising:
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searching a main central angle C by respectively forming a plurality of beams with different central angles, calculating a signal strength of incoming signals at each beam, and choosing the central angle C of the beam which has the largest signal strength as the main central angle;
determining a weight vector in response to the main central angle C by looking up a predetermined table;
fine-tuning the main central angle C by detecting a signal strength of incoming signals; and
forming a main beam according to the fine-tuned main central angle and the weight vector. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification