Intelligent backhaul radio with co-band zero division duplexing
First Claim
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1. An intelligent backhaul radio comprising:
- a plurality of transmit radio frequency (RF) chains to convert from a plurality of transmit chain input signals to a plurality of respective RF transmit chain signals;
a plurality of receive RF chains to convert a plurality of receive RF signals to respective baseband sampled signals, wherein the receive RF signals comprise one or more transmitter related signals, each respectively derived from one of the RF transmit chain signals;
a plurality of receive baseband cancellation combiners to combine a plurality of baseband filtered signals to provide a plurality of receive symbol streams;
a plurality of adaptable baseband filter sets, each set of the plurality of adaptable baseband filter sets to filter respective ones of the plurality of baseband sampled signals and each set to provide a plurality of baseband filtered signals respectively to each of the plurality of respective receive baseband cancellation combiners, wherein each of said plurality of adaptable baseband filter sets comprise a plurality of adaptable baseband filters; and
a cancellation controller to adapt each of said plurality of adaptable baseband filters to reduce an interfering signal component within one or more of said receive symbol streams, wherein the controller utilizes a metric that accounts for the level of said interfering signal component within one or more of said receive symbol streams and is derived from one or more of said receive RF signals or said receive symbol streams, and wherein said interfering signal component is derived from one or more of said RF transmit chain signals.
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Abstract
A intelligent backhaul radio is disclosed, which can operate by zero division duplexing for use in PTP or PMP topologies, providing for significant spectrum usage benefits among other benefits. Specific system architectures and structures to enable active cancellation of multiple transmit signals at multiple receivers within a MIMO radio are disclosed. Further disclosed aspects include the adaptive optimization of cancellation parameters or coefficients.
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Citations
30 Claims
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1. An intelligent backhaul radio comprising:
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a plurality of transmit radio frequency (RF) chains to convert from a plurality of transmit chain input signals to a plurality of respective RF transmit chain signals; a plurality of receive RF chains to convert a plurality of receive RF signals to respective baseband sampled signals, wherein the receive RF signals comprise one or more transmitter related signals, each respectively derived from one of the RF transmit chain signals; a plurality of receive baseband cancellation combiners to combine a plurality of baseband filtered signals to provide a plurality of receive symbol streams; a plurality of adaptable baseband filter sets, each set of the plurality of adaptable baseband filter sets to filter respective ones of the plurality of baseband sampled signals and each set to provide a plurality of baseband filtered signals respectively to each of the plurality of respective receive baseband cancellation combiners, wherein each of said plurality of adaptable baseband filter sets comprise a plurality of adaptable baseband filters; and a cancellation controller to adapt each of said plurality of adaptable baseband filters to reduce an interfering signal component within one or more of said receive symbol streams, wherein the controller utilizes a metric that accounts for the level of said interfering signal component within one or more of said receive symbol streams and is derived from one or more of said receive RF signals or said receive symbol streams, and wherein said interfering signal component is derived from one or more of said RF transmit chain signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An intelligent backhaul radio comprising:
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a plurality of transmit radio frequency (RF) chains to convert from a plurality of transmit chain input signals to a plurality of respective RF transmit chain signals; a plurality of receive RF chains to convert a plurality of receive RF signals to respective baseband sampled signals, wherein the receive RF signals comprise one or more transmitter related signals, each respectively derived from one of the RF transmit chain signals; a plurality of receive baseband cancellation combiners to combine a plurality of baseband filtered signals to provide a plurality of receive symbol streams; a plurality of adaptable baseband filter sets, each set of the plurality of adaptable baseband filter sets to filter respective ones of the plurality of baseband sampled signals and each set to provide a plurality of baseband filtered signals respectively to each of the plurality of respective receive baseband cancellation combiners, wherein each of said plurality of adaptable baseband filter sets comprise a plurality of adaptable baseband filters; an antenna array comprising; a plurality of directive gain antenna elements; and one or more selectable RF connections that selectively couple certain of the plurality of directive gain antenna elements to certain of the plurality of receive RF chains, wherein a number of directive gain antenna elements that can be selectively coupled to receive RF chains exceeds a number of receive RF chains that can accept receive RF signals from the one or more selectable RF connections; a frequency selective receive path channel multiplexer comprising said adaptable baseband filter sets and said cancellation combiners, and wherein said frequency selective receive path channel multiplexer is configured to reduce an interfering signal component within one or more of said receive symbol streams, and wherein said interfering signal component is derived from one or more of said RF transmit chain signals. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification