DIRECTIONAL MIMO ANTENNA
First Claim
Patent Images
1. A multiplexing method for operating a Multiple Input Multiple Output (MIMO) system in a multipath environment, the MIMO system comprising a transmit subsystem comprising two or more transmit antennas and a receive subsystem comprising two or more receive antennas, the multiplexing method comprising:
- in a training mode,activating a first transmit antenna to transmit a predetermined pilot signal, determining a first angle of arrival (AOA) and a first time of arrival (TOA) from one or more signals received at the receive subsystem;
activating a second transmit antenna to transmit a predetermined pilot signal, and determining a second angle of arrival (AOA) and a second time of arrival (TOA) from one or more signals received at the receive subsystem;
deriving a spatial frequency and temporal frequency transfer function from the signals received at the receive subsystem;
in an operating mode,using the spatial and temporal transfer function to discriminate signals received at the receive subsystem.
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Abstract
A Multiple Input Multiple Output (MIMO) antenna system and operating method that provides spatial- and temporal multiplexing with polarization independent operating modes.
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Citations
7 Claims
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1. A multiplexing method for operating a Multiple Input Multiple Output (MIMO) system in a multipath environment, the MIMO system comprising a transmit subsystem comprising two or more transmit antennas and a receive subsystem comprising two or more receive antennas, the multiplexing method comprising:
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in a training mode, activating a first transmit antenna to transmit a predetermined pilot signal, determining a first angle of arrival (AOA) and a first time of arrival (TOA) from one or more signals received at the receive subsystem; activating a second transmit antenna to transmit a predetermined pilot signal, and determining a second angle of arrival (AOA) and a second time of arrival (TOA) from one or more signals received at the receive subsystem; deriving a spatial frequency and temporal frequency transfer function from the signals received at the receive subsystem; in an operating mode, using the spatial and temporal transfer function to discriminate signals received at the receive subsystem. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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a plurality of directional receiving antennas, arranged to receive multiple signals from an array of transmitting antennas; a plurality of combining circuits, with each combining circuit connected to a respective one of the directional receiving antennas, to produce a first angle signal indicative of a first angle of arrival (AOA) for one or more signals received when a first transmit antenna is active; to produce a second angle signal indicative of a second angle of arrival (AOA) when a second transmit antenna is active; a signal processor, for deriving a spatial frequency and temporal frequency transfer function from the signals received at the receive subsystem; and in an operating mode, for using the spatial and temporal transfer function to discriminate signals received at the receive subsystem.
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Specification