Reconfigurable antennas and configuration selection methods for AD-HOC networks
First Claim
1. An ad-hoc network system, comprising:
- at least one multi-element reconfigurable transmitter and/or at least one multi-element reconfigurable receiver where each said multi-element reconfigurable transmitter and receiver comprises multiple antennas where each antenna is capable of changing a radiation pattern and/or a polarization of a radiated field; and
a processor that processes software implementing a configuration selection method for selecting an antenna configuration for said at least one multi-element reconfigurable transmitter and/or receiver, where the antenna configuration is selected based on changes in interference in a transmission over a transmission link including the antenna being configured, a transmission rate of at least one transmitter, a received signal strength of at least one receiver, an error vector magnitude of at least one receiver, a channel matrix of at least one receiver, and/or a packet error rate of at least one of the receivers or transmitters of the transmission link,wherein the software processed by the processor implements a centralized configuration selection process that has knowledge of part or all communication and interference channels in the ad-hoc network and selects the antenna configuration that optimizes the sum capacity of the ad-hoc network, the sum throughput of the ad-hoc network, and/or the error rate of the ad-hoc network, and wherein optimizing the sum capacity of the ad-hoc network, the sum throughput of the ad-hoc network, and/or the error rate of the ad-hoc network comprises solving the following optimization problem;
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Accused Products
Abstract
Reconfigurable antennas in an ad-hoc network are provided where all nodes employ MIMO/SIMO/MISO communication techniques. Three types of reconfigurable antennas: Reconfigurable Printed Dipole Array (RPDA), Reconfigurable Circular Patch Antenna (RCPA) and Two-Port Reconfigurable CRLH Leaky Wave Antennas are used. The RPDA, RCPA and the CRLH Leaky Wave antennas have a different number of configurations as well as different degrees of pattern diversity between possible configurations. To effectively use these antennas in a network, the performance of centralized and decentralized antenna configuration selection schemes are quantified for reconfiguration at one or both link ends. The sum capacity of the network is used as a metric to quantify the performance of these antennas in measured and simulated network channels.
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Citations
16 Claims
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1. An ad-hoc network system, comprising:
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at least one multi-element reconfigurable transmitter and/or at least one multi-element reconfigurable receiver where each said multi-element reconfigurable transmitter and receiver comprises multiple antennas where each antenna is capable of changing a radiation pattern and/or a polarization of a radiated field; and a processor that processes software implementing a configuration selection method for selecting an antenna configuration for said at least one multi-element reconfigurable transmitter and/or receiver, where the antenna configuration is selected based on changes in interference in a transmission over a transmission link including the antenna being configured, a transmission rate of at least one transmitter, a received signal strength of at least one receiver, an error vector magnitude of at least one receiver, a channel matrix of at least one receiver, and/or a packet error rate of at least one of the receivers or transmitters of the transmission link, wherein the software processed by the processor implements a centralized configuration selection process that has knowledge of part or all communication and interference channels in the ad-hoc network and selects the antenna configuration that optimizes the sum capacity of the ad-hoc network, the sum throughput of the ad-hoc network, and/or the error rate of the ad-hoc network, and wherein optimizing the sum capacity of the ad-hoc network, the sum throughput of the ad-hoc network, and/or the error rate of the ad-hoc network comprises solving the following optimization problem; - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An ad-hoc network system, comprising:
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at least one multi-element reconfigurable transmitter and/or at least one multi-element reconfigurable receiver where each said multi-element reconfigurable transmitter and receiver comprises multiple antennas where each antenna is capable of changing a radiation pattern and/or a polarization of a radiated field; and a processor that processes software implementing a configuration selection method for selecting an antenna configuration for said at least one multi-element reconfigurable transmitter and/or receiver, where the antenna configuration is selected based on changes in interference in a transmission over a transmission link including the antenna being configured, a transmission rate of at least one transmitter, a received signal strength of at least one receiver, an error vector magnitude of at least one receiver, a channel matrix of at least one receiver, and/or a packet error rate of at least one of the receivers or transmitters of the transmission link, wherein the software processed by the processor implements a distributed configuration selection process that selects the antenna configuration using link channel and interference noise plus a noise covariance matrix, a transmission rate, a received signal strength, an error vector magnitude, a channel matrix, and/or a packet error rate for the transmission link including the antenna being configured by optimizing the link capacity, link throughput, or the link packet error rate of said transmission link, and wherein optimizing the link capacity, link throughput, or the link packet error rate of said transmission link comprises solving the following optimization problem;
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9. A method for selecting the configuration of at least one multi-element reconfigurable transmitter and/or receiver in an ad-hoc network, comprising:
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a processor selecting an antenna configuration for at least one multi-element reconfigurable transmitter and/or at least one multi-element reconfigurable receiver of a transmission link in said ad-hoc network where each said multi-element reconfigurable transmitter and receiver comprises multiple antennas where each antenna is capable of changing a radiation pattern and/or a polarization of a radiated field; measuring or estimating interference, a channel matrix, a transmission rate, a received signal strength, an error vector magnitude, and/or an error packet rate of said transmission link; and selecting an antenna configuration for another transmission link in said ad-hoc network based on said measured or estimated interference, channel matrix, transmission rate, received signal strength, error vector magnitude, and/or error packet rate of said transmission link, wherein selecting the antenna configuration comprises implementing a centralized configuration selection process that has knowledge of part or all communication and interference channels in the ad-hoc network and selecting the antenna configuration that optimizes the sum capacity of the ad-hoc network, the sum throughput of the ad-hoc network, and/or the error rate of the ad-hoc network, and wherein optimizing the sum capacity of the ad-hoc network, the sum throughput of the ad-hoc network, and/or the error rate of the ad-hoc network comprises solving the following optimization problem; - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for selecting the configuration of at least one multi-element reconfigurable transmitter and/or receiver in an ad-hoc network, comprising:
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a processor selecting an antenna configuration for at least one multi-element reconfigurable transmitter and/or at least one multi-element reconfigurable receiver of a transmission link in said ad-hoc network where each said multi-element reconfigurable transmitter and receiver comprises multiple antennas where each antenna is capable of changing a radiation pattern and/or a polarization of a radiated field; measuring or estimating interference, a channel matrix, a transmission rate, a received signal strength, an error vector magnitude, and/or an error packet rate of said transmission link; and selecting an antenna configuration for another transmission link in said ad-hoc network based on said measured or estimated interference, channel matrix, transmission rate, received signal strength, error vector magnitude, and/or error packet rate of said transmission link, wherein selecting the antenna configuration comprises implementing a distributed configuration selection process that selects the antenna configuration using link channel and interference noise plus a noise covariance matrix, a transmission rate, a received signal strength, an error vector magnitude, a channel matrix, and/or a packet error rate for the transmission link including the antenna being configured by optimizing the link capacity, link throughput, or the link packet error rate of said transmission link, wherein optimizing the link capacity, link throughput, or the link packet error rate of said transmission link comprises solving the following optimization problem;
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Specification