FULL-DUPLEX WIRELESS TRANSCEIVER WITH HYBRID CIRCUIT AND RECONFIGURABLE RADIATION PATTERN ANTENNA
First Claim
1. A dual-antenna hybrid transmitter-receiver cancellation circuit, comprising:
- a hybrid component coupled to a first antenna port and to a second antenna port isolating transmitted signals at a transmitter port from received signals at a receiver port;
a configurable radiation pattern antenna coupled to one of the first antenna port and the second antenna port; and
a control circuit controlling the configurable antenna based on a received radiation pattern so as to avoid signal cancellation at the receiver port by varying at least one of amplitude and phase of signal at the one of the first antenna port and the second antenna port.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and circuit are provided that solve the problem of prolonged signal fading in transceivers utilizing dual antenna match in a hybrid transmitter-receiver cancellation circuit, thereby enabling practically implementable full-duplex single channel, or duplexerless frequency division duplex (FDD), wireless communication systems. The method includes controlling dynamic change in signal'"'"'s amplitude and phase at the receiver port of a hybrid Tx-Rx circuit by continuously varying radiation pattern parameters of at least one antenna, while maintaining nearly constant impedance at the hybrid'"'"'s antenna interface ports and equalizing propagation delays between the hybrid circuit and both antennas, using a novel circuit design.
27 Citations
25 Claims
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1. A dual-antenna hybrid transmitter-receiver cancellation circuit, comprising:
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a hybrid component coupled to a first antenna port and to a second antenna port isolating transmitted signals at a transmitter port from received signals at a receiver port; a configurable radiation pattern antenna coupled to one of the first antenna port and the second antenna port; and a control circuit controlling the configurable antenna based on a received radiation pattern so as to avoid signal cancellation at the receiver port by varying at least one of amplitude and phase of signal at the one of the first antenna port and the second antenna port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating a dual-antenna hybrid transmitter-receiver cancellation circuit, the method comprising:
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varying at least one radiation pattern parameter of at least one configurable antenna of dual antennas in a hybrid transmitter-receiver cancellation circuit, so as to cause a corresponding change in at least one of amplitude and phase of a signal received at a receiver port of the circuit; maintaining nearly constant impedance at the hybrid circuit'"'"'s antenna interface ports; and equalizing propagation delays between the hybrid circuit and both of the dual antennas. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A full-duplex transceiver comprising:
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means for varying at least one radiation pattern parameter of at least one configurable antenna of dual antennas in a hybrid transmitter-receiver cancellation circuit, so as to cause a corresponding change in at least one of amplitude and phase of a signal received at a receiver port of the circuit; means for maintaining nearly constant impedance at the hybrid circuit'"'"'s antenna interface ports; and means for equalizing propagation delays between the hybrid circuit and both of the dual antennas.
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18. A full-duplex transceiver comprising:
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at least one processor configured for; varying at least one radiation pattern parameter of at least one configurable antenna of dual antennas in a hybrid transmitter-receiver cancellation circuit, so as to cause a corresponding change in at least one of amplitude and phase of a signal received at a receiver port of the circuit; maintaining nearly constant impedance at the hybrid circuit'"'"'s antenna interface ports; and equalizing propagation delays between the hybrid circuit and both of the dual antennas; and a memory coupled to the at least one processor for storing data. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A computer program product, comprising:
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a computer-readable medium comprising code for causing a transceiver to; vary at least one radiation pattern parameter of at least one configurable antenna of dual antennas in a hybrid transmitter-receiver cancellation circuit, so as to cause a corresponding change in at least one of amplitude and phase of a signal received at a receiver port of the circuit; maintain nearly constant impedance at the hybrid circuit'"'"'s antenna interface ports; and equalize propagation delays between the hybrid circuit and both of the dual antennas.
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Specification